Knut Stavem

• Øvrebotten, Tarjei; Mecinaj, Albulena; Stavem, Knut; Ghanima, Waleed; Brønstad, Eivind & Durheim, Michael Thomas [Show all 14 contributors for this article] (2024). Trajectory of cardiac troponin T following moderate-to-severe COVID-19 and the association with cardiac abnormalities. BMC Cardiovascular Disorders. ISSN 1471-2261. 24(1). doi: 10.1186/s12872-024-03854-7.
• Cestelli, Lucia; Gulsvik, Amund; Johannessen, Ane; Stavem, Knut & Nielsen, Rune (2023). Reduced lung function and cause-specific mortality: A population-based study of Norwegian men followed for 26 years. Respiratory Medicine. ISSN 0954-6111. 219. doi: 10.1016/j.rmed.2023.107421. Full text in Research Archive
• Solberg, Ole Geir; Aaberge, Lars; Bosse, Gerhard; Ueland, Thor; Gullestad, Lars & Aukrust, Pål [Show all 7 contributors for this article] (2023). Microvascular function and inflammatory activation in Takotsubo cardiomyopathy. ESC Heart Failure. ISSN 2055-5822. 10(5), p. 3216–3222. doi: 10.1002/ehf2.14461. Full text in Research Archive
• Jervan, Øyvind; Haukeland-Parker, Stacey Marie; Gleditsch, Jostein; Tavoly, Mazdak; Klok, Frederikus A. & Steine, Kjetil [Show all 14 contributors for this article] (2023). The Effects of Exercise Training in Patients With Persistent Dyspnea Following Pulmonary Embolism: A Randomized Controlled Trial. Chest. ISSN 0012-3692. 164(4), p. 981–991. doi: 10.1016/j.chest.2023.04.042. Full text in Research Archive
• Tholin, Birgitte; Ghanima, Waleed; Selle, Maria & Stavem, Knut (2023). Incidence and determinants of venous thromboembolism over 90 days in hospitalized and nonhospitalized patients with COVID-19. Journal of Internal Medicine. ISSN 0954-6820. 294(6), p. 721–729. doi: 10.1111/joim.13706. Full text in Research Archive
• Øvrebotten, Tarjei; Heck, Siri Lagethon; Skjørten, Ingunn; Einvik, Gunnar; Stavem, Knut & Ingul, Charlotte Ingeborg Björk [Show all 8 contributors for this article] (2023). Minor Myocardial Scars in Association with Cardiopulmonary Function after COVID-19. Cardiology. ISSN 0008-6312. 148(4), p. 300–306. doi: 10.1159/000530942. Full text in Research Archive
• Jervan, Øyvind; Dhayyat, Adam; Gleditsch, Jostein; Haukeland-Parker, Stacey Marie; Tavoly, Mazdak & Klok, Frederikus A. [Show all 10 contributors for this article] (2023). Demographic, clinical, and echocardiographic factors associated with residual perfusion defects beyond six months after pulmonary embolism. Thrombosis Research. ISSN 0049-3848. 229, p. 7–14. doi: 10.1016/j.thromres.2023.06.004. Full text in Research Archive
• Lerum, Tøri Vigeland; Meltzer, Carin; Rivero, Jezabel Rodriguez; Aaløkken, Trond Mogens; Brønstad, Eivind & Aarli, Bernt Bøgvald [Show all 12 contributors for this article] (2023). A prospective study of pulmonary outcomes and chest computed tomography in the first year after COVID-19. European Respiratory Journal Open Research (ERJ Open Research). ISSN 2312-0541. 9(2). doi: 10.1183/23120541.00575-2022. Full text in Research Archive
• Stavem, Knut; Einvik, Gunnar & Lundqvist, Christofer (2022). Cognitive Impairment 13 Months After Hospitalization for COVID-19. Open Forum Infectious Diseases. ISSN 2328-8957. 9(7). doi: 10.1093/ofid/ofac355. Full text in Research Archive
• Cestelli, Lucia; Johannessen, Ane; Stavem, Knut; Gulsvik, Amund & Nielsen, Rune (2022). Period and cohort effects: consequences on spirometric lung function in Norway during the 20th century. European Respiratory Journal Open Research (ERJ Open Research). ISSN 2312-0541. 8(4), p. 1–11. doi: 10.1183/23120541.00302-2022. Full text in Research Archive
• Ruud, Espen Asak; Heck, Sigurd; Stavem, Knut; Søyseth, Vidar; Geitung, Jonn Terje & Ashraf, Haseem (2022). Low diffusion capacity of the lung predicts pneumothorax and chest drainage after CT-guided lung biopsy. BMC Research Notes. ISSN 1756-0500. 15(1). doi: 10.1186/s13104-022-06234-6. Full text in Research Archive
• Ingul, Charlotte Bjørk; Edvardsen, Anne; Follestad, Turid; Trebinjac, Divna; Ankerstjerne, Odd Andre Wathne & Brønstad, Eivind [Show all 14 contributors for this article] (2022). Changes in cardiopulmonary exercise capacity and limitations 3-12 months after COVID-19. European Respiratory Journal. ISSN 0903-1936. 61(2). doi: 10.1183/13993003.00745-2022. Full text in Research Archive
• Stavem, Knut; Schirmer, Henrik & Gulsvik, Amund (2022). Respiratory symptoms and cardiovascular causes of deaths: A population-based study with 45 years of follow-up. PLOS ONE. ISSN 1932-6203. 17(10). doi: 10.1371/journal.pone.0276560. Full text in Research Archive
• Stavem, Knut; Einvik, Gunnar; Tholin, Birgitte; Ghanima, Waleed; Hessen, Erik & Lundqvist, Christofer (2022). Cognitive function in non-hospitalized patients 8–13 months after acute COVID-19 infection: A cohort study in Norway. PLOS ONE. ISSN 1932-6203. 17(8). doi: 10.1371/journal.pone.0273352. Full text in Research Archive
• Tran, Thien Trung; Kristiansen, Cathrine Helgestad; Thomas, Owen Matthew Truscott; Roy, Sumit K; Haidl, Frans Felxi & Ashraf, Haseem [Show all 9 contributors for this article] (2022). Indirect CT venography of the lower extremities: impact of scan delay and patient factors on contrast enhancement and examination quality. European Radiology. ISSN 0938-7994. 32(11), p. 7946–7955. doi: 10.1007/s00330-022-08841-0. Full text in Research Archive
• Hansen, Tonya Moen; Stavem, Knut & Rand, Kim (2022). Completing the time trade-off with respondents who are older, in poorer health or with an immigrant background in an EQ-5D-5L valuation study. European Journal of Health Economics. ISSN 1618-7598. 24(6), p. 877–884. doi: 10.1007/s10198-022-01517-y. Full text in Research Archive
• Garratt, Andrew; Nerheim, Ellen Margrethe; Einvik, Gunnar; Stavem, Knut & Edvardsen, Anne (2022). Evaluation of the Norwegian version of the Dyspnoea-12 questionnaire in patients with COPD. BMJ Open Respiratory Research. ISSN 2052-4439. 9(1). doi: 10.1136/bmjresp-2022-001262. Full text in Research Archive
• Øvrebotten, Tarjei; Myhre, Peder Langeland; Grimsmo, Jostein; Mecinaj, Albulena; Trebinjac, Divna & Nossen, Magnus Berger [Show all 12 contributors for this article] (2022). Changes in cardiac structure and function from 3 to 12 months after hospitalization for COVID-19. Clinical Cardiology. ISSN 0160-9289. 45(10), p. 1044–1052. doi: 10.1002/clc.23891. Full text in Research Archive
• Stavem, Knut; Heir, Trond; Dammen, Toril; Brønstad, Eivind; Lerum, Tøri Vigeland & Durheim, Michael Thomas [Show all 9 contributors for this article] (2022). The course and determinants of post-traumatic stress over 12 months after hospitalization for COVID-19. Frontiers in Psychiatry. ISSN 1664-0640. 13. doi: 10.3389/fpsyt.2022.931349. Full text in Research Archive Show summary

  Objective: To assess the trajectory of symptoms and symptom-defined post-traumatic stress disorder (PTSD) from 1.5 to 12 months after hospitalization for COVID-19 and determine risk factors for persistent symptoms and PTSD. Methods: This was a prospective cohort study of consecutive patients discharged after hospitalization for COVID-19 before 1 June 2020 in six hospitals in Southern Norway. Symptom-defined PTSD was assessed by the post-traumatic stress disorder (PTSD) checklist for DSM-5 (PCL-5) at 1.5, 3 and/or 12 months after hospitalization, using DSM-5 criteria. Changes in PCL-5 symptom score and the prevalence of PTSD were analyzed with multivariable mixed models. Results: In total, 388 patients were discharged alive, and 251 (65%) participated. Respondents had a mean (SD) age of 58.4 (14.2) years, and 142 (57%) were males. The prevalence of symptom-defined PTSD was 14, 8, and 9% at 1.5, 3, and 12 months, respectively. WHO disease severity for COVID-19 was not associated with PCL-5 scores. Female sex, lower age and non-Norwegian origin were associated with higher PCL-5 scores. The odds ratio (OR) (95%CI) for PTSD was 0.32 (0.12 to 0.83, p = 0.019) at 3 months and 0.38 (0.15 to 0.95, p = 0.039) at 12 months compared to 1.5 months. There was no association between PTSD and WHO severity rating. Conclusions: The level of PTSD symptoms decreased from 1.5 to 3 months after hospitalization, but did not decrease further to 12 months, and there was no association between PTSD symptoms and COVID-19 disease severity.

• Garratt, Andrew & Stavem, Knut (2022). Comparison of EQ-5D-3L and 5L versions following operative fixation of closed ankle fractures. Quality of Life Research. ISSN 0962-9343. 31(7), p. 2071–2082. doi: 10.1007/s11136-022-03105-2. Full text in Research Archive
• Tholin, Birgitte; Fiskvik, Hilde; Tveita, Anders Aune; Tsykunova, Galina; Opperud, Helene & Busterud, Kari [Show all 11 contributors for this article] (2022). Thromboembolic complications during and after hospitalization for COVID-19: Incidence, risk factors and thromboprophylaxis. Thrombosis Update. 6, p. 1–6. doi: 10.1016/j.tru.2021.100096. Full text in Research Archive Show summary

  Introduction The incidence of thromboembolism during COVID-19 and the use of thromboprophylaxis vary greatly between studies. Only a few studies have investigated the rate of thromboembolism post-discharge. This study determined the 90-day incidence of venous and arterial thromboembolic complications, risk factors for venous thromboembolic events and characterized the use of thromboprophylaxis during and after hospitalization. Materials and methods We retrospectively reviewed medical records for adult patients hospitalized for >24 h for COVID-19 before May 15, 2020, in ten Norwegian hospitals. We extracted data on demographics, thromboembolic complications, thromboembolic risk factors, and the use of thromboprophylaxis. Cox proportional hazards regression was used to determine risk factors for VTE. Results 550 patients were included. The 90-day incidence of arterial and venous thromboembolism in hospitalized patients was 6.9% (95% CI: 5.1–9.3) overall and 13.8% in the ICU. Male sex (hazard ratio (HR) 7.44, 95% CI 1.73–32.02, p = 0.007) and previous VTE (HR 6.11, 95% CI: 1.74–21.39, p = 0.005) were associated with risk of VTE in multivariable analysis. Thromboprophylaxis was started in 334 patients (61%) with a median duration of 7 days (25th–75th percentile 3–13); in the VTE population 10/23 (43%) started thromboprophylaxis prior to diagnosis. After discharge 20/223 patients received extended thromboprophylaxis and 2/223 (0.7%, 95% CI: 0.3–1.9) had a thromboembolism. Conclusions The 90-day incidence of thromboembolism in COVID-19 patients was 7%, but <1% after discharge. Risk factors were male sex and previous VTE. Most patients received thromboprophylaxis during hospitalization, but only <10% after discharge.

• Ingul, Charlotte Ingeborg Björk; Grimsmo, Jostein; Mecinaj, Albulena; Trebinjac, Divna; Nossen, Magnus Berger & Andrup, Simon [Show all 14 contributors for this article] (2022). Cardiac Dysfunction and Arrhythmias 3 Months After Hospitalization for COVID-19. Journal of the American Heart Association (JAHA). ISSN 2047-9980. 11(3). doi: 10.1161/JAHA.121.023473. Full text in Research Archive
• Hansen, Tonya Moen; Stavem, Knut & Rand, Kim (2022). Sample Size and Model Prediction Accuracy in EQ-5D-5L Valuations Studies: Expected Out-of-Sample Accuracy Based on Resampling with Different Sample Sizes and Alternative Model Specifications. Medical Decision Making Policy & Practice. ISSN 2381-4683. 7(1). doi: 10.1177/23814683221083839. Full text in Research Archive
• Tran, Thien Trung; Bjarnason, Haraldur; Mcdonald, Jennifer Rebecca; Skaga, Nils Oddvar; Houghton, Damon E & Kim, Brian [Show all 8 contributors for this article] (2021). Prophylactic placement of inferior vena cava filters and the risk of death or venous thromboembolism in severe trauma patients: a retrospective study comparing two hospitals with different approaches. Acta Radiologica Open. ISSN 2058-4601. 10(3), p. 1–8. doi: 10.1177/2058460121999345.
• Aalberg, Karoline; Stavem, Knut; Norheim, Frode Amador; Russell, Michael Bjørn & Chaibi, Aleksander (2021). Effect of oral and transdermal oestrogen therapy on bone mineral density in functional hypothalamic amenorrhoea: A systematic review and meta-analysis. BMJ Open sport & exercise medicine. ISSN 2055-7647. 7(3). doi: 10.1136/bmjsem-2021-001112. Full text in Research Archive
• Ruud, Espen Asak; Stavem, Knut; Geitung, Jonn Terje; Borthne, Arne Sigmund; Søyseth, Vidar & Ashraf, Haseem (2021). Predictors of pneumothorax and chest drainage after percutaneous CT-guided lung biopsy: A prospective study. European Radiology. ISSN 0938-7994. doi: 10.1007/s00330-020-07449-6.
• Stavem, Knut (2021). Switching from one reference biological to another in stable patients for non-medical reasons: a literature search and brief review. Journal of Market Access & Health Policy. ISSN 2001-6689. 9(1). doi: 10.1080/20016689.2021.1964792. Full text in Research Archive
• Stavem, Knut; Johannessen, Ane; Nielsen, Rune & Gulsvik, Amund (2021). Respiratory symptoms and respiratory deaths: A multi-cohort study with 45 years observation time. PLOS ONE. ISSN 1932-6203. 16(11), p. 1–14. doi: 10.1371/journal.pone.0260416. Full text in Research Archive
• Hansen, Tonya Moen; Stavem, Knut & Rand, Kim (2021). Time trade-off with someone to live for: impact of having significant others on time trade-off valuations of hypothetical health states. Quality of Life Research. ISSN 0962-9343. doi: 10.1007/s11136-021-03026-6. Full text in Research Archive
• Chaibi, Aleksander; Stavem, Knut & Russell, Michael Bjørn (2021). Spinal manipulative therapy for acute neck pain: A systematic review and meta-analysis of randomised controlled trials. Journal of Clinical Medicine. ISSN 2077-0383. 10(21). doi: 10.3390/jcm10215011. Full text in Research Archive
• Falk, Ragnhild Sørum; Mariampillai, Julian Eek; Prestgaard, Erik Edvard; Heir, Trond; Bodegard, Johan & Robsahm, Trude Eid [Show all 18 contributors for this article] (2021). The Oslo Ischaemia Study: cohort profile. BMJ Open. ISSN 2044-6055. 11(10). doi: 10.1136/bmjopen-2021-049111. Full text in Research Archive Show summary

  Abstract Purpose The Oslo Ischaemia Study was designed to investigate the prevalence and predictors of silent coronary disease in Norwegian middle-aged men, specifically validating exercise electrocardiography (ECG) findings compared with angiography. The study has been important in investigating long-term predictors of cardiovascular morbidity and mortality, as well as investigating a broad spectrum of epidemiological and public health perspectives. Participants In 1972–1975, 2014 healthy men, 40–59 years old, were enrolled in the study. Comprehensive clinical examination included an ECG-monitored exercise test at baseline and follow-ups. The cohort has been re-examined four times during 20 years. Linkage to health records and national health registries has ensured complete endpoint registration of morbidity until the end of 2006, and cancer and mortality until the end of 2017. Findings to date The early study results provided new evidence, as many participants with a positive exercise ECG, but no chest pain (‘silent ischaemia’), did not have significant coronary artery stenosis after all. Still, they were over-represented with coronary disease after years of follow-up. Furthermore, participants with the highest physical fitness had lower risk of cardiovascular disease, and the magnitude of blood pressure responses to moderate exercise was shown to influence the risk of cardiovascular disease and mortality. With time, follow-up data allowed the scope of research to expand into other fields of medicine, with the aim of investigating predictors and the importance of lifestyle and risk factors. Future plans Recently, the Oslo Ischaemia Study has been found worthy, as the first scientific study, to be preserved by The National Archives of Norway. All the study material will be digitised, free to use and accessible for all. In 2030, the Oslo Ischaemia Study will be linked to the Norwegian Cause of Death Registry to obtain complete follow-up to death. Thus, a broad spectrum of additional opportunities opens.

• Skjørten, Ingunn; Ankerstjerne, Odd Andre Wathne; Trebinjac, Divna; Brønstad, Eivind; Rasch-Halvorsen, Øystein & Einvik, Gunnar [Show all 10 contributors for this article] (2021). Cardiopulmonary exercise capacity and limitations 3 months after COVID-19 hospitalisation. European Respiratory Journal. ISSN 0903-1936. 58(2). doi: 10.1183/13993003.00996-2021. Show summary

  Background This study aimed to describe cardiopulmonary function during exercise 3 months after hospital discharge for COVID-19 and compare groups according to dyspnoea and intensive care unit (ICU) stay. Methods Participants with COVID-19 discharged from five large Norwegian hospitals were consecutively invited to a multicentre, prospective cohort study. In total, 156 participants (mean age 56.2 years, 60 females) were examined with a cardiopulmonary exercise test (CPET) 3 months after discharge and compared with a reference population. Dyspnoea was assessed using the modified Medical Research Council (mMRC) dyspnoea scale. Results Peak oxygen uptake (V′O2 peak) <80% predicted was observed in 31% (n=49). Ventilatory efficiency was reduced in 15% (n=24), while breathing reserve <15% was observed in 16% (n=25). Oxygen pulse <80% predicted was found in 18% (n=28). Dyspnoea (mMRC ≥1) was reported by 47% (n=59). These participants had similar V′O2 peak (p=0.10) but lower mean±sd V′O2 peak·kg−1 % predicted compared with participants without dyspnoea (mMRC 0) (76±16% versus 89±18%; p=0.009) due to higher body mass index (p=0.03). For ICU- versus non-ICU-treated participants, mean±sd V′O2 peak % predicted was 82±15% and 90±17% (p=0.004), respectively. Ventilation, breathing reserve and ventilatory efficiency were similar between the ICU and non-ICU groups. Conclusions One-third of participants experienced V′O2 peak <80% predicted 3 months after hospital discharge for COVID-19. Dyspnoeic participants were characterised by lower exercise capacity due to obesity and lower ventilatory efficiency. Ventilation and ventilatory efficiency were similar between ICU- and non-ICU-treated participants.

• Garratt, Andrew; Hansen, Tonya Moen; Augestad, Liv Ariane; Rand, Kim & Stavem, Knut (2021). Norwegian population norms for the EQ-5D-5L: results from a general population survey. Quality of Life Research. ISSN 0962-9343. doi: 10.1007/s11136-021-02938-7. Full text in Research Archive
• Astrup, Guro Lindviksmoen; Rohde, Gudrun E.; Rimehaug, Stein Arne; Andersen, Marit Helen; Bernklev, Tomm & Bjordal, Kristin [Show all 11 contributors for this article] (2021). Comparing the use of patient-reported outcomes in clinical studies in Europe in 2008 and 2018: a literature review. Quality of Life Research. ISSN 0962-9343. doi: 10.1007/s11136-021-02946-7. Full text in Research Archive
• Tholin, Birgitte; Ghanima, Waleed Khalid; Einvik, Gunnar; Aarli, Bernt Bøgvald; Brønstad, Eivind & Skjønsberg, Ole Henning [Show all 7 contributors for this article] (2021). Incidence of thrombotic complications in hospitalised and non-hospitalised patients after COVID-19 diagnosis. British Journal of Haematology. ISSN 0007-1048. 194(3), p. 542–546. doi: 10.1111/bjh.17522. Full text in Research Archive
• Jervan, Øyvind; Gleditsch, Jostein; Tavoly, Mazdak; Klok, Frederikus A.; Rashid, Diyar Nori Mohamad & Holst, René [Show all 9 contributors for this article] (2021). Pulmonary and cardiac variables associated with persistent dyspnea after pulmonary embolism. Thrombosis Research. ISSN 0049-3848. 201, p. 90–99. doi: 10.1016/j.thromres.2021.02.014. Full text in Research Archive
• Wimmer, Rolf Henning; Lundqvist, Christofer; Saltyte Benth, Jurate; Stavem, Knut; Andersen, Geir Øystein & Henriksen, Julia [Show all 9 contributors for this article] (2021). Health-related quality of life after out-of-hospital cardiac arrest – a five-year follow-up study . Resuscitation. ISSN 0300-9572. 162, p. 372–380. doi: 10.1016/j.resuscitation.2021.01.036. Full text in Research Archive
• Einvik, Gunnar; Dammen, Toril; Ghanima, Waleed Khalid; Heir, Trond & Stavem, Knut (2021). Prevalence and risk factors for post-traumatic stress in hospitalized and non-hospitalized COVID-19 patients. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 18(4), p. 1–12. doi: 10.3390/ijerph18042079. Full text in Research Archive
• Stavem, Knut; Ghanima, Waleed Khalid; Olsen, Magnus Kringstad; Gilboe, Hanne M. & Einvik, Gunnar (2021). Prevalence and determinants of fatigue after covid-19 in non-hospitalized subjects: A population-based study. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 18(4), p. 1–11. doi: 10.3390/ijerph18042030. Full text in Research Archive
• Tran, Thien Trung; Bjarnason, Haraldur; McDonald, Jennifer; Gross, Brian; Kim, Brian & Houghton, Damon E. [Show all 8 contributors for this article] (2020). Does prophylactic inferior vena cava filter reduce the hazard of pulmonary embolism and mortality in severe trauma? A single center retrospective comparative study. European Journal of Radiology Open (EJR Open). ISSN 2352-0477. 8:100299, p. 1–6. doi: 10.1016/j.ejro.2020.100299. Full text in Research Archive
• Lerum, Tøri Vigeland; Aaløkken, Trond M; Brønstad, Eivind; Aarli, Bernt Bøgvald; Ikdahl, Eirik & Lund, Kristine Marie Aarberg [Show all 14 contributors for this article] (2020). Dyspnoea, lung function and CT findings three months after hospital admission for COVID-19. European Respiratory Journal. ISSN 0903-1936. doi: 10.1183/13993003.03448-2020. Full text in Research Archive
• Stavem, Knut; Ghanima, Waleed Khalid; Olsen, Magnus Kringstad; Gilboe, Hanne Margrethe & Einvik, Gunnar (2020). Persistent symptoms 1.5-6 months after COVID-19 in non-hospitalised subjects: A population-based cohort study. Thorax. ISSN 0040-6376. doi: 10.1136/thoraxjnl-2020-216377. Full text in Research Archive
• Noone, John Christopher; Stegger, Marc; Lilje, Berit; Stavem, Knut; Helmersen, Karin & Skråmm, Inge [Show all 7 contributors for this article] (2020). Molecular characteristics of Staphylococcus aureus associated prosthetic joint infections after hip fractures treated with hemiarthroplasty: a retrospective genome-wide association study. Scientific Reports. ISSN 2045-2322. 10:16553, p. 1–8. doi: 10.1038/s41598-020-73736-3. Full text in Research Archive
• Fredriksen, Mats; Golparian, Neshat; Beiske, Kornelia Katalin & Stavem, Knut (2020). Impact of methylphenidate on sleep problems in adults with ADHD: a pilot polysomnography study. Nordic Journal of Psychiatry. ISSN 0803-9488. 75(3), p. 234–238. doi: 10.1080/08039488.2020.1833984. Full text in Research Archive Show summary

  Background: Attention-deficit hyperactivity disorder (ADHD) is associated with disrupted sleep and circadian rhythm. Medication for ADHD may have side effects aggravating sleep-disturbances, however beneficial effects on ADHD may contribute to improve sleep. Aims: This pilot study aims to examine outcomes of first time stimulant treatment on objective and subjective sleep characteristics, and psychiatric symptoms, in adult ADHD patients with pretreatment sleep problems, but without any primary sleep disorder. Methods: In total, 9 previously unmedicated adult ADHD subjects who reported pretreatment sleep problems, completed polysomnography (PSG) and questionnaires on subjective sleep disturbances and psychiatric symptoms. Data was collected before and after 6 weeks on first time medication with immediate-release methylphenidate (MPH-IR), mean daily dose 43mg. Results: Subjects on-medication showed an increased percentage of Stage 2 sleep compared to their non-treated baseline (46.6% versus 55.2%, p¼.011). Otherwise, there were no significant changes in PSG variables. There were no firm changes in daytime sleepiness or symptoms of sleep disturbances. Conclusions: These findings should be interpreted cautiously given the open-label design and small sample size, and should be examined in larger studies with more rigorous study designs.

• Cheng, Socheat; Siddiqui, Tahreem Ghazal; Gossop, Michael; Stavem, Knut; Kristoffersen, Espen Saxhaug & Lundqvist, Christofer (2020). Health-related quality of life in hospitalized older patients with versus without prolonged use of opioid analgesics, benzodiazepines, and z-hypnotics: a cross-sectional study. BMC Geriatrics. ISSN 1471-2318. 20(425), p. 1–9. doi: 10.1186/s12877-020-01838-8. Full text in Research Archive
• Gulsvik, Amund; Bakke, Per; Brøgger, Jan; Nielsen, Rune & Stavem, Knut (2020). Respiratory symptoms and mortality in four general population cohorts over 45 years. Respiratory Medicine. ISSN 0954-6111. 170. doi: 10.1016/j.rmed.2020.106060. Full text in Research Archive
• Hansen, Tonya Moen; Helland, Ylva; Augestad, Liv Ariane; Rand, Kim; Stavem, Knut & Garratt, Andrew Malcolm (2020). Elicitation of Norwegian EQ-5D-5L values for hypothetical and experience-based health states based on the EuroQol Valuation Technology (EQ-VT) protocol. BMJ Open. ISSN 2044-6055. 10(6). doi: 10.1136/bmjopen-2019-034683.
• Solberg, Ole Geir; Stavem, Knut; Ragnarsson, Asgrimur; Beitnes, Jan Otto; Skårdal, Rita & Seljeflot, Ingebjørg [Show all 10 contributors for this article] (2019). Index of microvascular resistance to assess the effect of rosuvastatin on microvascular function in women with chest pain and no obstructive coronary artery disease: A double-blind randomized study. Catheterization and cardiovascular interventions. ISSN 1522-1946. 94(5), p. 660–668. doi: 10.1002/ccd.28157. Full text in Research Archive
• Stavem, Knut; Skjaker, Stein Arve; Hoel, Henrik; Naumann, Markus George; Sigurdsen, Ulf & Ghanima, Waleed Khalid [Show all 7 contributors for this article] (2019). Risk factors for symptomatic venous thromboembolism following surgery for closed ankle fractures: A case-control study. Foot and Ankle Surgery. ISSN 1268-7731. doi: 10.1016/j.fas.2019.08.006. Full text in Research Archive
• Parker, Krystina; Bull-Engelstad, Ingrid; Saltyte Benth, Jurate; Lippe, Nanna von der; Reier-Nilsen, Morten & Os, Ingrid [Show all 7 contributors for this article] (2019). Effectiveness of using STOPP/START criteria to identify potentially inappropriate medication in people aged ≥ 65 years with chronic kidney disease: a randomized clinical trial. European Journal of Clinical Pharmacology. ISSN 0031-6970. doi: 10.1007/s00228-019-02727-9. Full text in Research Archive
• Utvåg, Stein-Erik; Naumann, Markus George; Sigurdsen, Ulf & Stavem, Knut (2019). Functional outcome 3–6 years after operative treatment of closed Weber B ankle fractures with or without syndesmotic fixation. Foot and Ankle Surgery. ISSN 1268-7731. doi: 10.1016/j.fas.2019.04.013. Full text in Research Archive
• Parker, Krystina; Bull-Engelstad, Ingrid; Aasebø, Willy; Lippe, Nanna von der; Reier-Nilsen, Morten & Os, Ingrid [Show all 7 contributors for this article] (2019). Medication regimen complexity and medication adherence in elderly patients with chronic kidney disease. Hemodialysis International. ISSN 1492-7535. doi: 10.1111/hdi.12739. Full text in Research Archive
• Kristoffersen, Espen Saxhaug; Stavem, Knut; LUNDQVIST, CHRISTOFER & Russell, Michael Bjørn (2019). The impact of chronic headache on workdays, unemployment and disutility in the general population. Journal of Epidemiology and Community Health. ISSN 0143-005X. doi: 10.1136/jech-2018-211127.
• Rønning, Pål Andre; Helseth, Eirik; Skaga, Nils Oddvar; Stavem, Knut & Langmoen, Iver Arne (2018). The effect of ICP monitoring in severe traumatic brain injury: a propensity score-weighted and adjusted regression approach. Journal of Neurosurgery. ISSN 0022-3085. 131(6), p. 1896–1904. doi: 10.3171/2018.7.JNS18270. Show summary

  OBJECTIVE The use of intracranial pressure (ICP) monitoring has been postulated to be beneficial in patients with severe traumatic brain injury (TBI), although studies investigating this hypothesis have reported conflicting results. The objective of this study was to evaluate the effect of inserting an ICP monitor on survival in patients with severe TBI. METHODS The Oslo University Hospital trauma registry was searched for the records of all patients admitted between January 1, 2002, and December 31, 2013, who fulfilled the Brain Trauma Foundation criteria for intracranial hypertension and who survived at least 24 hours after admission. The impact of ICP monitoring was investigated using both a logistic regression model and a multiple imputed, propensity score–weighted logistic regression analysis. RESULTS The study involved 1327 patients, in which 757 patients had an ICP monitor implanted. The use of ICP monitors significantly increased in the study period (p < 0.01). The 30-day overall mortality was 24.3% (322 patients), divided into 35.1% (200 patients, 95% confidence interval [CI] 31.3%–39.1%) in the group without an ICP monitor and 16.1% (122 patients, 95% CI 13.6%–18.9%) in the group with an ICP monitor. The impact of ICP monitors on 30-day mortality was found to be beneficial both in the complete case analysis logistic regression model (odds ratio [OR] 0.23, 95% CI 0.16–0.33) and in the adjusted, aggregated, propensity score–weighted imputed data sets (OR 0.22, 95% CI 0.15–0.35; both p < 0.001). The sensitivity analysis indicated that the findings are robust to unmeasured confounders. CONCLUSIONS The authors found that the use of an ICP monitor is significantly associated with improved survival in patients with severe head injury. https://thejns.org/doi/abs/10.3171/2018.7.JNS18270 KEYWORDS traumatic brain injury; Glasgow Coma Scale; ICP monitoring; intracranial pressure

• Stavem, Knut; Augestad, Liv Ariane; Kristiansen, Ivar Sønbø & Rand, Kim (2018). General population norms for the EQ-5D-3 L in Norway: comparison of postal and web surveys. Health and Quality of Life Outcomes. ISSN 1477-7525. 16(204), p. 1–10. doi: 10.1186/s12955-018-1029-1. Full text in Research Archive
• Farkhooy, Amir; Bodegard, Johan; Erikssen, Jan Emil; Janson, Christer; Hedenström, Hans & Stavem, Knut [Show all 7 contributors for this article] (2018). Cross-sectional and longitudinal analyses of the association between lung function and exercise capacity in healthy Norwegian men. BMC Pulmonary Medicine. ISSN 1471-2466. 18(118). doi: 10.1186/s12890-018-0655-z.
• Beiske, Kornelia Katalin & Stavem, Knut (2018). Health status in subjects with suspected obstructive sleep apnea and comparison with a general population. Scientific Reports. ISSN 2045-2322. 8(1). doi: 10.1038/s41598-018-23904-3.
• Garratt, Andrew; Naumann, Markus George; Sigurdsen, Ulf; Utvåg, Stein-Erik & Stavem, Knut (2018). Evaluation of three patient reported outcome measures following operative fixation of closed ankle fractures. BMC Musculoskeletal Disorders. ISSN 1471-2474. 19(1). doi: 10.1186/s12891-018-2051-5. Full text in Research Archive
• Meijer, Mathias; Thygesen, Lau Caspar; Green, Anders; Emneus, Martha; Brasso, Klaus & Iversen, Peter [Show all 10 contributors for this article] (2018). Finasteride treatment and male breast cancer: a register-based cohort study in four Nordic countries. Cancer Medicine. ISSN 2045-7634. 7(1), p. 254–260. doi: 10.1002/cam4.1273.
• Kristoffersen, Espen Saxhaug; Stavem, Knut; LUNDQVIST, CHRISTOFER & Russell, Michael Bjørn (2018). Excessive daytime sleepiness in chronic migraine and chronic tension-type headache from the general population. Cephalalgia. ISSN 0333-1024. 38(5), p. 993–997. doi: 10.1177/0333102417721133.
• Stavem, Knut; Naumann, Markus George; Sigurdsen, Ulf & Utvåg, Stein Erik (2017). Determinants of Health Status Three to Six Years After Surgical Treatment of Closed Ankle Fracture and Comparison with the General Population: A Historical Cohort Study. JBJS Open Access. ISSN 2472-7245. 2(3). doi: 10.2106/JBJS.OA.17.00019. Full text in Research Archive
• Kristoffersen, Espen Saxhaug; Stavem, Knut; LUNDQVIST, CHRISTOFER & Russell, Michael Bjørn (2017). Excessive daytime sleepiness in secondary chronic headache from the general population. The Journal of Headache and Pain. ISSN 1129-2369. 18:85, p. 1–6. doi: 10.1186/s10194-017-0794-2. Full text in Research Archive
• Skjaker, Stein Arve; Hoel, Henrik; Dahl, Vegard & Stavem, Knut (2017). Factors associated with life-sustaining treatment restriction in a general intensive care unit. PLOS ONE. ISSN 1932-6203. 12:e0181312(7), p. 1–11. doi: 10.1371/journal.pone.0181312.
• Stavem, Knut; Naumann, Markus George; Sigurdsen, Ulf & Utvåg, Stein-Erik (2017). The association of body mass index with complications and functional outcomes after surgery for closed ankle fractures. The Bone & Joint Journal. ISSN 2049-4394. 99B(10), p. 1389–1398. doi: 10.1302/0301-620X.99B10.BJJ-2016-1038.R1.
• Smeland, Tom Eirik; Müller, Fredrik; Blomfeldt, Anita; Stavem, Knut & Aamot, Hege Vangstein (2017). No associations established between single nucleotide polymorphisms in human Toll-like receptor 2 and Toll-interacting protein and Staphylococcus aureus bloodstream infections. APMIS - Journal of Pathologiy, Microbiology and Immunology. ISSN 0903-4641. 125(10), p. 927–932. doi: 10.1111/apm.12734.
• Naumann, Markus George; Sigurdsen, Ulf; Utvåg, Stein-Erik & Stavem, Knut (2017). Associations of timing of surgery with postoperative length of stay, complications, and functional outcomes 3-6 years after operative fixation of closed ankle fractures. Injury. ISSN 0020-1383. 48(7), p. 1662–1669. doi: 10.1016/j.injury.2017.03.039.
• Stavem, Knut; Hoel, Henrik; Skjaker, Stein Arve & Haagensen, Rolf E (2017). Charlson comorbidity index derived from chart review or administrative data: Agreement and prediction of mortality in intensive care patients. Clinical Epidemiology. ISSN 1179-1349. 9, p. 311–320. doi: 10.2147/CLEP.S133624. Show summary

  Purpose: This study compared the Charlson comorbidity index (CCI) information derived from chart review and administrative systems to assess the completeness and agreement between scores, evaluate the capacity to predict 30-day and 1-year mortality in intensive care unit (ICU) patients, and compare the predictive capacity with that of the Simplified Acute Physiology Score (SAPS) II model. Patients and methods: Using data from 959 patients admitted to a general ICU in a Norwegian university hospital from 2007 to 2009, we compared the CCI score derived from chart review and administrative systems. Agreement was assessed using % agreement, kappa, and weighted kappa. The capacity to predict 30-day and 1-year mortality was assessed using logistic regression, model discrimination with the c-statistic, and calibration with a goodness-of-fit statistic. Results: The CCI was complete (n=959) when calculated from chart than from administrative data (n=839). Agreement was good, with a weighted kappa of 0.667 (95% confidence interval: 0.596–0.714). The c-statistics for categorized CCI scores from charts and administrative data were similar in the model that included age, sex, and type of admission: 0.755 and 0.743 for 30-day mortality, respectively, and 0.783 and 0.775, respectively, for 1-year mortality. Goodness-of-fit statistics supported the model fit. Conclusion: The CCI scores from chart review and administrative data showed good agreement and predicted 30-day and 1-year mortality in ICU patients. CCI combined with age, sex, and type of admission predicts mortality almost as well as the physiology-based SAPS II.

• Stavem, Knut; Kristiansen, Håvard; Kristoffersen, Espen Saxhaug; Kvaerner, Kari Jorunn & Russell, Michael Bjørn (2017). Association of excessive daytime sleepiness with migraine and headache frequency in the general population. The Journal of Headache and Pain. ISSN 1129-2369. 18(35). doi: 10.1186/s10194-017-0743-0. Full text in Research Archive
• Beiske, Kornelia Katalin; Sand, Trond; Rugland, Eyvind & Stavem, Knut (2017). Comparison of sleep latency and number of SOREMPs in the home and hospital with a modified multiple sleep latency test: A randomized crossover study. Journal of clinical neurophysiology. ISSN 0736-0258. 34(3), p. 261–267. doi: 10.1097/WNP.0000000000000359.
• Garratt, Andrew & Stavem, Knut (2017). Measurement properties and normative data for the Norwegian SF-36: results from a general population survey. Health and Quality of Life Outcomes. ISSN 1477-7525. 15. doi: 10.1186/s12955-017-0625-9. Full text in Research Archive
• Naumann, Markus George; Sigurdsen, Ulf; Utvåg, Stein-Erik & Stavem, Knut (2017). Functional outcomes following surgical-site infections after operative fixation of closed ankle fractures. Foot and Ankle Surgery. ISSN 1268-7731. 23(4), p. 311–316. doi: 10.1016/j.fas.2016.10.002.
• Stavem, Knut; Naumann, Markus George; Sigurdsen, Ulf & Utvåg, Stein-Erik (2017). Association of Body Mass Index With the Pattern of Surgically Treated Ankle Fractures Using Two Different Classification Systems. Journal of Foot and Ankle Surgery. ISSN 1067-2516. 56(2), p. 314–318. doi: 10.1053/j.jfas.2016.10.008.
• Naumann, Markus George; Sigurdsen, Ulf; Utvåg, Stein-Erik & Stavem, Knut (2016). Incidence and risk factors for removal of an internal fixation following surgery for ankle fracture: A retrospective cohort study of 997 patients. Injury. ISSN 0020-1383. 47(8), p. 1783–1788. doi: 10.1016/j.injury.2016.05.011.
• Solberg, Ole Geir; Stavem, Knut; Ragnarsson, Asgrimur; Ioanes, Dan; Arora, Satish & Endresen, Knut [Show all 11 contributors for this article] (2016). Index of microvascular resistance after early conversion from calcineurin inhibitor to everolimus in heart transplantation: A sub-study to a 1-year randomized trial. The Journal of Heart and Lung Transplantation. ISSN 1053-2498. 35(8), p. 1010–1017. doi: 10.1016/j.healun.2016.03.002.
• Kjærulff, Thora M.; Ersbøll, Annette Kjær; Green, Anders; Emneus, Martha; Pukkala, Eero & Bolin, Kristian [Show all 11 contributors for this article] (2016). Patterns of finasteride use in the male populations of four Nordic countries: A cross-national drug utilization study. Scandinavian Journal of Urology. ISSN 2168-1805. 50(3), p. 220–227. doi: 10.3109/21681805.2015.1136676.
• Augestad, Liv Ariane; Stavem, Knut; Kristiansen, Ivar Sønbø; Samuelsen, Carl Haakon & Rand-Hendriksen, Kim (2016). Influenced from the start: anchoring bias in time trade-off valuations. Quality of Life Research. ISSN 0962-9343. 25(9), p. 1–13. doi: 10.1007/s11136-016-1266-x.
• Parker, Krystina; Aasebø, Willy; Haslemo, Tore & Stavem, Knut (2016). Relationship between cytochrome P450 polymorphisms and prescribed medication in elderly haemodialysis patients. SpringerPlus. ISSN 2193-1801. 5(350). doi: 10.1186/s40064-016-1986-y. Full text in Research Archive
• Dolatowski, Filip Celestyn; Adampour, Mina; Frihagen, Frede Jon; Stavem, Knut; Utvåg, Stein-Erik & Hoelsbrekken, Sigurd Erik (2016). Preoperative posterior tilt of at least 20° increased the risk of fixation failure in Garden-I and -II femoral neck fractures: 322 patients followed for a mean of 3 years. Acta Orthopaedica. ISSN 1745-3674. 87(3), p. 252–256. doi: 10.3109/17453674.2016.1155253. Full text in Research Archive
• Lauritzen, Peter Mæhre; Stavem, Knut; Andersen, Jack Gunnar; Stokke, Mali Victoria; Tennstrand, Anne Lise & Bjerke, Gisle [Show all 10 contributors for this article] (2016). Double reading of current chest CT examinations: Clinical importance of changes to radiology reports. European Journal of Radiology. ISSN 0720-048X. 85(1), p. 199–204. doi: 10.1016/j.ejrad.2015.11.012. Show summary

  Objectives Misinterpretation of radiological examinations is an important contributing factor to diagnostic errors. Double reading reduces interpretation errors and increases sensitivity. Consultant radiologists in Norwegian hospitals submit 39% of computed tomography (CT) reports for quality assurance by double reading. Our objective was to estimate the proportion of radiology reports that were changed during double reading and to assess the potential clinical impact of these changes. Materials and methods In this retrospective cross-sectional study we acquired preliminary and final reports from 1023 consecutive double read chest CT examinations conducted at five public hospitals. The preliminary and final reports were compared for changes in content. Three experienced pulmonologists independently rated the clinical importance of these changes. The severity of the radiological findings in clinically important changes was classified as increased, unchanged, or decreased. Results Changes were classified as clinically important in 91 (9%) of 1023 reports. Of these: 3 were critical (demanding immediate action), 15 were major (implying a change in treatment) and 73 were intermediate (affecting subsequent investigations). More clinically important changes were made to urgent examinations and less to female first readers. Chest radiologist made more clinically important changes than other second readers. The severity of the radiological findings was increased in 73 (80%) of the clinically important changes. Conclusion A 9% rate of clinically important changes made during double reading may justify quality assurance of radiological interpretation. Using expert second readers and targeting a selection of urgent cases prospectively may increase the yield of discrepant cases and reduce harm to patients.

• Solberg, Ole Geir; Aaberge, Lars; Ragnarsson, Asgrimur; Aas, Marit; Endresen, Knut & Saltyte Benth, Jurate [Show all 8 contributors for this article] (2016). Comparison of simplified and comprehensive methods for assessing the index of microvascular resistance in heart transplant recipients. Catheterization and cardiovascular interventions. ISSN 1522-1946. 87(2), p. 283–290. doi: 10.1002/ccd.26283. Show summary

  OBJECTIVES: The objectives of the present study were to compare a simplified and a comprehensive method of estimating the index of microvascular resistance (IMR) and assess the changes from 7-11 weeks to 1 year after heart transplant (HTx). BACKGROUND: he IMR is specific to the microvasculature and reflects the status of the microcirculation in cardiac patients and can be estimated via a simplified method (IMRs ) or a comprehensive method (IMRc ). The calculation for the latter includes coronary wedge pressure and central venous pressure. METHODS: Consecutively transplanted patients (n = 48) underwent left and right heart catheterization including physiological evaluation at two time points post-HTx. The agreement between the values of IMR obtained using the IMRs and IMRc methods were assessed using Bland-Altman analysis. The agreements and differences were assessed using mixed model analysis. RESULTS: The mean bias between IMRs and IMRc was 1.3 mm Hg·s (95% limits of agreement: -1.2, 3.8 mm Hg). Between 7-11 weeks and 1 year post-HTx there was a significant decline in IMRs values (P = 0.03) but a smaller and statistically nonsignificant decline in IMRc values (P = 0.13). The significant difference (P = 0.04) between IMRc and IMRs 7-11 weeks post-HTx was no longer present at 1 year (P = 0.24). CONCLUSIONS: The IMRs method resulted in slightly higher IMR estimates and exhibited a somewhat larger change over the 10-month follow-up period than the IMRc method. However, the differences between the methods were small and unlikely to be of clinical importance. © 2015 Wiley Periodicals, Inc.

• RØNNING, PÅL ANDRE; Gunstad, Per Ole Flaten; Skaga, Nils Oddvar; Langmoen, Iver Arne; Stavem, Knut & Helseth, Eirik (2015). The impact of blood ethanol concentration on the classification of head injury severity in traumatic brain injury. Brain Injury. ISSN 0269-9052. 29(13-14), p. 1648–1653. doi: 10.3109/02699052.2015.1075154. Show summary

  BACKGROUND: Traumatic brain injury (TBI) is classified into mild, moderate and severe, based on the Glasgow Coma Score (GCS). However, TBI patients are often influenced by ethanol, which in itself can attenuate the level of consciousness. This study investigated the effect of ethanol on the GCS group classification in TBI patients. METHODS: The Oslo University Hospital trauma database was searched for all patients admitted with a head injury where the blood ethanol concentration (BEC) had been measured (n = 1004). The effect of BEC on GCS groups was analysed using multivariate ordinal logistic regression. RESULTS: This study identified 546, 142 and 316 patients in the mild, moderate and severe groups, respectively. Increasing BEC by 1 g kg(-1) and pre-hospital intubation had OR = 1.34 and 16.34 for being in a more severe GCS group, respectively. Increasing head abbreviated injury scale (head-AIS) was significantly associated with being in a more severe GCS group. The modelled probability of detecting a head-AIS of 4 or 5 in a patient with BEC of 2.0 g kg(-1) was 20%, 38% and 65% in the mild, moderate and severe groups, respectively. CONCLUSIONS: Increasing BEC was associated with increasing odds of being in a more severe GCS group. However, because the modelled probability of significant brain injury was high in patients with high levels of BEC, a reduced level of consciousness in intoxicated patients mandates further radiological investigations.

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• Jervan, Øyvind; Haukeland-Parker, Stacey Marie; Gleditsch, Jostein; Tavoly, Mazdak; Klok, Frederikus A. & Steine, Kjetil [Show all 14 contributors for this article] (2023). Rehabilitation to improve exercise capacity and quality of life after pulmonary embolism.
• Torjusen, Marius Lamberg; Rand, Kim; Whitehurst, David GT.; Stavem, Knut & Barra, Mathias (2023). Alvorlighet eller helsegevinst - Hva prioriterer befolkningen?
• Moss, Thomas Totland; Stavem, Knut; Aandahl, Astrid; Gløersen, Anne Siri; Grønberg, Bjørn Henning & Neumann, Kirill [Show all 8 contributors for this article] (2023). Case Report: Limbic encephalitis following treatment with durvalumab for small-cell lung cancer. Frontiers in Immunology. ISSN 1664-3224. 14. doi: 10.3389/fimmu.2023.1278761. Full text in Research Archive
• Ho, Ai Phi Thuy; Tjønnfjord, Eirik; Schreiner, Christoffer; Sørensen, Ole Henrik Sellereite; Iqbal, Naveed & Stavem, Knut [Show all 7 contributors for this article] (2023). En kvinne i 50-årene med levercirrhose og stillingsavhengig dyspné. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 143(14). doi: 10.4045/tidsskr.22.0754.
• Torjusen, Marius Lamberg; Rand, Kim; Whitehurst, David GT.; Stavem, Knut & Barra, Mathias (2023). SEVQoL, Severity and EQ-5D-5L, An early look.
• Torjusen, Marius Lamberg; Rand, Kim; Stavem, Knut; Whitehurst, David G T & Barra, Mathias (2023). Alvorlighet og EQ-5D - Hvordan bruke livskvalitetsverktøy til å få nye innsikter om befolkningens intuisjoner rundt prioriteringer i helsevesenet .
• Hansen, Tonya Moen; Stavem, Knut & Rand, Kim (2022). Correction to: Time trade‑off with someone to live for: impact of having significant others on time trade‑off valuations of hypothetical health states (Quality of Life Research, (2022), 31, 4, (1199-1207), 10.1007/s11136-021-03026-6). Quality of Life Research. ISSN 0962-9343. 31(10). doi: 10.1007/s11136-022-03160-9.
• Chaibi, Aleksander; Stavem, Knut & Russell, Michael Bjørn (2022). Manipulasjonsbehandling mot akutte nakkesmerter? Tidsskrift for Den norske legeforening. ISSN 0029-2001. 142(1), p. 16–17. doi: 10.4045/tidsskr.21.0798.
• Verveen, Anouk; Müller, Fabiola; Lloyd, Andrew; Moss-Morris, Rona; Omland, Torbjørn & Penninx, Brenda [Show all 14 contributors for this article] (2022). A research agenda for post-COVID-19 fatigue. Journal of Psychosomatic Research. ISSN 0022-3999. 154. doi: 10.1016/j.jpsychores.2022.110726.
• Garratt, Andrew Malcolm; Ghanima, Waleed Khalid; Einvik, Gunnar & Stavem, Knut (2021). Quality of life after COVID-19 without hospitalisation: Good overall, but reduced in some dimensions. Journal of Infection. ISSN 0163-4453. 82(5), p. 186–188. doi: 10.1016/j.jinf.2021.01.002.
• Haukeland-Parker, Stacey Marie; Jervan, Øyvind; Johannessen, Hege Hølmo; Gleditsch, Jostein; Stavem, Knut & Steine, Kjetil [Show all 11 contributors for this article] (2021). Pulmonary rehabilitation to improve physical capacity, dyspnea, and quality of life following pulmonary embolism (the PeRehab study): study protocol for a two-center randomized controlled trial. Trials. ISSN 1745-6215. 22, p. 1–9. doi: 10.1186/s13063-020-04940-9. Full text in Research Archive
• Astrup, Guro Lindviksmoen; Rohde, Gudrun E.; Rimehaug, Stein Arne; Andersen, Marit Helen; Bernklev, Tomm & Bjordal, Kristin [Show all 10 contributors for this article] (2020). Comparing the use of patient-reported outcomes in clinical studies in Europe in 2008 and 2018; a literature review.
• Cheng, Socheat; Siddiqui, Tahreem Ghazal; Gossop, Michael; Stavem, Knut; Kristoffersen, Espen Saxhaug & Lundqvist, Christofer (2019). Overuse of opioids and benzidiazepines among elderly patients: Characteristics of at-risk patients and disparities in quality of life .
• Kristoffersen, Espen Saxhaug; Stavem, Knut; LUNDQVIST, CHRISTOFER & Russell, Michael Bjørn (2018). The impact of chronic headache on workdays, unemployment and disutility in the general population.
• Parker, Krystina; Lippe, Nanna von der; Reier-Nilsen, Morten; Os, Ingrid & Stavem, Knut (2018). A prevalence study of potentially inappropriate prescribing in elderly kidney patients.
• Kristoffersen, Espen Saxhaug; Stavem, Knut; LUNDQVIST, CHRISTOFER & Russell, Michael Bjørn (2018). Reply to the letter by Min et al. Cephalalgia. ISSN 0333-1024. 38(10), p. 1701–1702. doi: 10.1177/0333102417747213.
• Parker, Krystina; Sadiq, Ahmed; Os, Ingrid; Reier-Nilsen, Morten & Stavem, Knut (2017). Obstructive sleep apnoea in elderly patients with predialytic or end stage renal disease K.
• Parker, Krystina; Aasebø, Willy & Stavem, Knut (2016). Potentially Inappropriate Medications in Elderly Haemodialysis Patients Using the STOPP Criteria. Drugs - real world outcomes. ISSN 2199-1154. 2016(3). doi: 10.1007/s40801-016-0088-z. Full text in Research Archive
• Lauritzen, Peter Mæhre; Stavem, Knut; Andersen, Jack Gunnar; Tennstrand, Anne Lise; Stokke, Mali Victoria & Bjerke, Gisle [Show all 10 contributors for this article] (2015). Endringer av klinisk betydning ved dobbeltgransking av CT thorax.

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