Frede Jon Frihagen

Image of Frede Jon Frihagen
Norwegian version of this page
Username
Visiting address Kirkeveien 166 OUS Ullevål 0450 Oslo
Postal address Postboks 4956 Nydalen OUS, Ullevål 0424 Oslo

Publications

  • Amundsen, Asgeir; Rizzo, Marco; Berger, Richard A.; Houdek, Matthew T.; Frihagen, Frede & Moran, Steven L. (2022). Twenty-Year Experience With Primary Distal Radioulnar Joint Arthroplasty From a Single Institution. Journal of Hand Surgery-American Volume. ISSN 0363-5023. doi: 10.1016/j.jhsa.2022.02.014.
  • Laszlo, Sofia; Nilsson, Martin; Pihl, Elsa; Mattila, Ville M.; Schilcher, Jörg & Sköldenberg, Olof [Show all 8 contributors for this article] (2022). Proximal Hamstring Tendon Avulsions: A Survey of Orthopaedic Surgeons’ Current Practices in the Nordic Countries. Sports Medicine - Open. ISSN 2198-9761. 8(49), p. 1–10. doi: 10.1186/s40798-022-00439-6.
  • Frihagen, Frede (2022). How to navigate the landscape of trochanteric hip fracture implants. Acta Orthopaedica. ISSN 1745-3674. 93, p. 358–359. doi: 10.2340/17453674.2022.2255.
  • Henjum, Kristi; Godang, Kristin; Quist-Paulsen, Else; Idland, Ane-Victoria; Neerland, Bjørn Erik & Sandvig, Heidi Vihovde [Show all 12 contributors for this article] (2021). Cerebrospinal fluid catecholamines in delirium and dementia. Brain Communications. ISSN 2632-1297. 3(3), p. 1–11. doi: 10.1093/braincomms/fcab121. Full text in Research Archive
  • Hassellund, Sondre Stafsnes; Zolic-Karlsson, Zinajda; Williksen, John Håkon; Husby, Torstein; Madsen, Jan Erik & Frihagen, Frede (2021). Surgical treatment is not cost-effective compared to nonoperative treatment for displaced distal radius fractures in patients 65 years and over. Bone & Joint Open (BJO). ISSN 2633-1462. 2(12), p. 1027–1034. doi: 10.1302/2633-1462.212.BJO-2021-0108.R1. Full text in Research Archive
  • Hassellund, Sondre Stafsnes; Williksen, John Håkon; Mjelde, Marit; Pripp, Are Hugo; Rosales, Carina & Karlsen, Øystein Espeland [Show all 8 contributors for this article] (2021). Infographic: Cast immobilization is non-inferior to volar locking plates in relation to QuickDASH after one year in patients aged 65 years and older: a randomized controlled trial of displaced distal radius fractures. . The Bone & Joint Journal. ISSN 2049-4394. 103-B(2), p. 245–246. doi: 10.1302/0301-620X.103B2.BJJ-2020-2562.
  • Midtgaard, Kaare Sourin; Frihagen, Frede ; Dornan, Grant J.; Coucheron, Marius; Fossåen, Carina Lavransdatter & Grundel, Dag [Show all 12 contributors for this article] (2021). Predicting secondary surgery after operative fixation of olecranon fractures: a model using data from 800 patients. JSES International. 5(5), p. 948–953. doi: 10.1016/j.jseint.2021.04.014. Full text in Research Archive
  • Comeau-Gauthier, Marianne; Zura, Robert D.; Bzovsky, Sofia; Schemitsch, Emil H.; Axelrod, Daniel & Avram, Victoria [Show all 12 contributors for this article] (2021). Heterotopic Ossification Following Arthroplasty for Femoral Neck Fracture. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 103(14), p. 1328–1334. doi: 10.2106/JBJS.20.01586. Full text in Research Archive
  • Ræder, Lise Benedikte Wendt; Andersen, Mette Renate; Madsen, Jan Erik; Jacobsen, Silje Berild; Frihagen, Frede & Figved, Wender (2021). Prognostic value of the Haraguchi classification in posterior malleolar fractures in A0 44-C type ankle fractures. Injury. ISSN 0020-1383. 52(10), p. 3150–3155. doi: 10.1016/j.injury.2021.07.038.
  • Alm, Carl Erik; Gjertsen, Jan-Erik; Basso, Trude; Matre, Kjell; Röhrl, Stephan Maximillian & Madsen, Jan Erik [Show all 7 contributors for this article] (2021). Trochanteric stabilizing plate in the treatment of trochanteric fractures: a scoping review. Acta Orthopaedica. ISSN 1745-3674. 92, p. 1–6. doi: 10.1080/17453674.2021.1954305. Full text in Research Archive
  • Ernst, Gernot Walter; Watne, Leiv Otto; Frihagen, Frede ; Wyller, Torgeir Bruun; Dominik, Andreas & Rostrup, Morten (2021). Low Heart Rate Variability Predicts Stroke and Other Complications in the First Six Postoperative Months After a Hip Fracture Operation. Frontiers in Cardiovascular Medicine. ISSN 2297-055X. 8, p. 1–8. doi: 10.3389/fcvm.2021.640970.
  • Dakhil, Shams; Thingstad, Pernille; Frihagen, Frede ; Johnsen, Lars Gunnar; Lydersen, Stian & Skovlund, Eva [Show all 10 contributors for this article] (2021). Orthogeriatrics prevents functional decline in hip fracture patients: report from two randomized controlled trials. BMC Geriatrics. ISSN 1471-2318. 21(208). doi: 10.1186/s12877-021-02152-7. Full text in Research Archive
  • Alm, Carl Erik; Frihagen, Frede ; Dybvik, Eva Hansen; Matre, Kjell; Madsen, Jan Erik & Gjertsen, Jan-Erik (2021). Implants for trochanteric fractures in Norway: the role of the trochanteric stabilizing plate—a study on 20,902 fractures from the Norwegian hip fracture register 2011–2017. Journal of Orthopaedic Surgery and Research. ISSN 1749-799X. 16, p. 1–8. doi: 10.1186/s13018-020-02163-x. Full text in Research Archive
  • Hassellund, Sondre Stafsnes; Williksen, John Håkon; Mjelde Laane, Marit; Pripp, Are Hugo; Rosales, Carina & Karlsen, Øyvind [Show all 8 contributors for this article] (2021). Cast immobilization is non-inferior to volar locking plates in relation to QuickDASH after one year in patients aged 65 years and older: a randomized controlled trial of displaced distal radius fractures. The Bone & Joint Journal. ISSN 2049-4394. 103-B(2), p. 247–255. doi: 10.1302/0301-620X.103B2.BJJ-2020-0192.R2.
  • Blankstein, Michael; Schemitsch, Emil H.; Bzovsky, Sofia; Poolman, Rudolf W.; Frihagen, Frede & Axelrod, Daniel [Show all 10 contributors for this article] (2020). What factors increase revision surgery risk when treating displaced femoral neck fractures with arthroplasty: A secondary analysis of the HEALTH Trial. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S49–S54. doi: 10.1097/BOT.0000000000001936.
  • Sivaratnam, Surabhi; Comeau-Gauthier, Marianne; Sprague, Sheila; Schemitsch, Emil H.; Poolman, Rudolf W. & Frihagen, Frede [Show all 9 contributors for this article] (2020). Predictors of loss to follow-up in hip fracture trials: A secondary analysis of the FAITH and HEALTH Trials. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S22–S28. doi: 10.1097/BOT.0000000000001928.
  • Afaq, Shaikh; OʼHara, Nathan N.; Schemitsch, Emil H.; Bzovsky, Sofia; Sprague, Sheila & Poolman, Rudolf W. [Show all 11 contributors for this article] (2020). Arthroplasty versus internal fixation for the treatment of undisplaced femoral neck fractures: A retrospective cohort study. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S9–S14. doi: 10.1097/BOT.0000000000001940.
  • Neilly, David; MacDonald, David R W; Sprague, Sheila; Bzovsky, Sofia; Axelrod, Daniel & Poolman, Rudolf W. [Show all 11 contributors for this article] (2020). Predictors of medical serious adverse events in hip fracture patients treated with arthroplasty. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S42–S48. doi: 10.1097/BOT.0000000000001935.
  • Axelrod, Daniel; Comeau-Gauthier, Marianne; Bzovsky, Sofia; Schemitsch, Emil H.; Poolman, Rudolf W. & Frihagen, Frede [Show all 10 contributors for this article] (2020). What predicts health-related quality of life for patients with displaced femoral neck fractures managed with arthroplasty? A secondary analysis of the HEALTH Trial. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S29–S36. doi: 10.1097/BOT.0000000000001933.
  • MacDonald, David R W; Neilly, David; Schneider, Prism S.; Bzovsky, Sofia; Sprague, Sheila & Axelrod, Daniel [Show all 12 contributors for this article] (2020). Venous thromboembolism in hip fracture patients: A subanalysis of the FAITH and HEALTH Trials. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S70–S75. doi: 10.1097/BOT.0000000000001939.
  • Bzovsky, Sofia; Comeau-Gauthier, Marianne; Schemitsch, Emil H.; Swiontkowski, Marc; Heels-Ansdell, Diane & Frihagen, Frede [Show all 8 contributors for this article] (2020). Factors associated with mortality after surgical management of femoral neck fractures. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S15–S21. doi: 10.1097/BOT.0000000000001937.
  • Noori, Atefeh; Sprague, Sheila; Bzovsky, Sofia; Schemitsch, Emil H.; Poolman, Rudolf W. & Frihagen, Frede [Show all 10 contributors for this article] (2020). Predictors of Long-Term Pain After Hip Arthroplasty in Patients With Femoral Neck Fractures: A Cohort Study. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S55–S63. doi: 10.1097/BOT.0000000000001929.
  • Blankstein, Michael; Schemitsch, Emil H.; Bzovsky, Sofia; Axelrod, Daniel; Poolman, Rudolf W. & Frihagen, Frede [Show all 10 contributors for this article] (2020). The FAITH and HEALTH Trials: Are We Studying Different Hip Fracture Patient Populations? Journal of Orthopaedic Trauma. ISSN 0890-5339. 34, p. S1–S8. doi: 10.1097/BOT.0000000000001930.
  • Svenøy, Stian; Watne, Leiv; Hestnes, Ingvild; WESTBERG, MARIANNE; Madsen, Jan Erik & Frihagen, Frede Jon (2020). Results after introduction of a hip fracture care pathway: comparison with usual care. Acta Orthopaedica. ISSN 1745-3674. 91(2), p. 139–145. doi: 10.1080/17453674.2019.1710804.
  • Ingstad, Frida; Solberg, Lene Bergendal; Nordsletten, Lars; Thorsby, Per Medbøe; Hestnes, Ingvild & Frihagen, Frede Jon (2020). Vitamin D status and complications, readmissions, and mortality after hip fracture. Osteoporosis International. ISSN 0937-941X. doi: 10.1007/s00198-020-05739-9. Full text in Research Archive
  • Ræder, Lise Benedikte Wendt; Stake, Ingrid Kvello; Madsen, Jan Erik; Frihagen, Frede Jon; Jacobsen, Silje Berild & Andersen, Mette Renate [Show all 7 contributors for this article] (2020). Randomized trial comparing suture button with single 3.5 mm syndesmotic screw for ankle syndesmosis injury: similar results at 2 years. Acta Orthopaedica. ISSN 1745-3674. 91. doi: 10.1080/17453674.2020.1818175. Full text in Research Archive
  • Frihagen, Frede Jon; Madsen, Jan Erik; Sundfeldt, Mikael; Flugsrud, Gunnar B; Andreassen, Joakim S. & Andersen, Mette Renate [Show all 7 contributors for this article] (2020). Taylor spatial frame or reamed intramedullary nailing for closed fractures of the tibial shaft: A randomized controlled trial. Journal of Orthopaedic Trauma. ISSN 0890-5339. 34(11), p. 612–619. doi: 10.1097/BOT.0000000000001802.
  • Ræder, Lise Benedikte Wendt; Figved, Wender; Madsen, Jan Erik; Frihagen, Frede Jon; Jacobsen, Silje Berild & Andersen, Mette Renate (2020). Better outcome for suture button compared with single syndesmotic screw for syndesmosis injury: Five-year results of a randomized controlled trial. The Bone & Joint Journal. ISSN 2049-4394. 102-B(2), p. 212–219. doi: 10.1302/0301-620X.102B2.BJJ-2019-0692.R2.
  • Bhandari, Mohit; Einhorn, Thomas A.; Guy-Att, Gordon; Schemitsch, Emil H.; Zura, Robert D. & Sprague, Sheila [Show all 16 contributors for this article] (2019). Total hip arthroplasty or hemiarthroplasty for hip fracture. New England Journal of Medicine. ISSN 0028-4793. 381(23), p. 2199–2208. doi: 10.1056/NEJMoa1906190.
  • Pihl, Elsa; Kristoffersen, Målfrid Holen; Rosenlund, Anne-Mari; Laszlo, Sofia; Berglöf, Mida & Ribom, Eva [Show all 16 contributors for this article] (2019). The proximal hamstring avulsion clinical trial (PHACT) - a randomised controlled non-inferiority trial of operative versus non-operative treatment of proximal hamstrings avulsions: Study protocol. BMJ Open. ISSN 2044-6055. 9:e031607(9), p. 1–5. doi: 10.1136/bmjopen-2019-031607.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine & Stenbro, May-Britt [Show all 18 contributors for this article] (2019). Determinants of trabecular bone score and prevalent vertebral fractures in women with fragility fractures: a cross-sectional sub-study of NoFRACT. Osteoporosis International. ISSN 0937-941X. 31, p. 505–514. doi: 10.1007/s00198-019-05215-z. Full text in Research Archive
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine & Stenbro, May-Britt [Show all 19 contributors for this article] (2019). Post-Fracture Risk Assessment: Target The Centrally Sited Fractures First! A Substudy of NoFRACT. Journal of Bone and Mineral Research. ISSN 0884-0431. 34(11), p. 2036–2044. doi: 10.1002/jbmr.3827. Full text in Research Archive
  • Andersen, Mette Renate; Diep, Lien My; Frihagen, Jon Frede; Hellund, Johan Castberg; Madsen, Jan Erik & Figved, Paul Wender (2019). Importance of Syndesmotic Reduction on Clinical Outcome After Syndesmosis Injuries. Journal of Orthopaedic Trauma. ISSN 0890-5339. 33(8), p. 397–403. doi: 10.1097/BOT.0000000000001485.
  • Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon; Rogmark, Cecilia & Utvåg, Stein-Erik (2019). Low bone density and high morbidity in patients between 55 and 70 years with displaced femoral neck fractures: A case-control study of 50 patients vs 150 normal controls. BMC Musculoskeletal Disorders. ISSN 1471-2474. 20, p. 1–8. doi: 10.1186/s12891-019-2732-8. Full text in Research Archive
  • Figved, Wender; Myrstad, Marius; Saltvedt, Ingvild; Finjarn, Merete; Odland, Liv Marie Flaten & Frihagen, Frede Jon (2019). Team approach: Multidisciplinary treatment of hip fractures in elderly patients: Orthogeriatric care. Journal of bone and joint surgery reviews (JBJS Reviews). ISSN 2329-9185. 7(6), p. 1–9. doi: 10.2106/JBJS.RVW.18.00136. Full text in Research Archive
  • Ranhoff, Anette Hylen; Saltvedt, Ingvild; Frihagen, Frede Jon; Ræder, Johan; Maini, Sameer & Sletvold, Olav (2019). Interdisciplinary care of hip fractures: Orthogeriatric models, alternative models, interdisciplinary teamwork. Baillière's Best Practice & Research : Clinical Rheumatology. ISSN 1521-6942. 33(2), p. 205–226. doi: 10.1016/j.berh.2019.03.015. Full text in Research Archive
  • Frisvoll, Cassandra; Clarke-Jenssen, John; Madsen, Jan Erik; Flugsrud, Gunnar B; Frihagen, Frede Jon & Andreassen, Geir [Show all 7 contributors for this article] (2019). Long-term outcomes after high-energy open tibial fractures: Is a salvaged limb superior to prosthesis in terms of physical function and quality of life? European Journal of Orthopaedic Surgery & Traumatology (EJOST). ISSN 1633-8065. 29(4), p. 899–906. doi: 10.1007/s00590-019-02382-x.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine & Stenbro, May-Britt [Show all 20 contributors for this article] (2019). High prevalence of vertebral fractures and low trabecular bone score in patients with fragility fractures: A cross-sectional sub-study of NoFRACT. Bone. ISSN 8756-3282. 122, p. 14–21. doi: 10.1016/j.bone.2019.02.008. Full text in Research Archive
  • Dolatowski, Filip Celestyn; Frihagen, Frede Jon; Bartels, Stefan; Opland, Vidar; Saltyte Benth, Jurate & Talsnes, Ove [Show all 8 contributors for this article] (2019). Screw Fixation Versus Hemiarthroplasty for Nondisplaced Femoral Neck Fractures in Elderly Patients - A Multicenter Randomized Controlled Trial. Journal of bone and joint surgery reviews (JBJS Reviews). ISSN 2329-9185. 101(2), p. 136–144. doi: 10.2106/JBJS.18.00316.
  • Halaas, Nathalie Bodd; Blennow, Kaj; Idland, Ane-Victoria; Wyller, Torgeir Bruun; Ræder, Johan & Frihagen, Frede Jon [Show all 9 contributors for this article] (2018). Neurofilament light in serum and cerebrospinal fluid of hip fracture patients with delirium. Dementia and Geriatric Cognitive Disorders. ISSN 1420-8008. 46(5-6), p. 346–357. doi: 10.1159/000494754. Full text in Research Archive
  • Figved, Wender; Svenøy, Stian; Röhrl, Stephan Maximillian; Dahl, Jon; Nordsletten, Lars & Frihagen, Frede Jon (2018). Higher cartilage wear in unipolar than bipolar hemiarthroplasties of the hip at 2 years: A randomized controlled radiostereometric study in 19 fit elderly patients with femoral neck fractures. Acta Orthopaedica. ISSN 1745-3674. 89(5), p. 503–508. doi: 10.1080/17453674.2018.1475899. Full text in Research Archive
  • Torbergsen, Anne Cathrine; Watne, Leiv; Frihagen, Frede Jon; Wyller, Torgeir Bruun & Mowe, Morten (2018). Effects of nutritional intervention upon bone turnover in elderly hip fracture patients. Randomized controlled trial. Clinical Nutrition ESPEN. ISSN 2405-4577. doi: 10.1016/j.clnesp.2017.11.012.
  • Andreasen, Camilla; Solberg, Lene Bergendal; Basso, Trude; Borgen, Tove Tveitan; Dahl, Cecilie & Wisløff, Torbjørn [Show all 20 contributors for this article] (2018). Effect of a Fracture Liaison Service on the Rate of Subsequent Fracture Among Patients With a Fragility Fracture in the Norwegian Capture the Fracture Initiative (NoFRACT): A Trial Protocol. JAMA Network Open. ISSN 2574-3805. 1(8). doi: 10.1001/jamanetworkopen.2018.5701. Full text in Research Archive
  • ANDERSEN, METTE RENATE; Frihagen, Frede Jon; Hellund, Johan Castberg; Madsen, Jan Erik & Figved, Wender (2018). Randomized trial comparing suture button with single syndesmotic screw for syndesmosis injury. Journal of Bone and Joint Surgery. American volume. ISSN 0021-9355. 100(1), p. 2–12. doi: 10.2106/JBJS.16.01011.
  • Hassel, Bjørnar; Mariussen, Espen; Idland, Ane-Victoria; Dahl, Gry Torsæter; Ræder, Johan & Frihagen, Frede Jon [Show all 9 contributors for this article] (2018). CSF sodium at toxic levels precedes delirium in hip fracture patients. Neurotoxicology. ISSN 0161-813X. 69(December), p. 11–16. doi: 10.1016/j.neuro.2018.08.010.
  • Malouf-Sierra, Jorge; Tarantino, Umberto; García-Hernández, Pedro A.; Corradini, Costantino; Overgaard, Søren & Stepan, Jan J. [Show all 14 contributors for this article] (2017). Effect of teriparatide or risedronate in elderly patients with a recent pertrochanteric hip fracture: final results of a 78-week randomized clinical trial. Journal of Bone and Mineral Research. ISSN 0884-0431. 32(5), p. 1040–1051. doi: 10.1002/jbmr.3067.
  • Hov, Karen Roksund; Bolstad, Nils; Idland, Ane-Victoria; Zetterberg, Henrik; Blennow, Kaj & Chaudhry, Farrukh Abbas [Show all 10 contributors for this article] (2017). Cerebrospinal Fluid S100B and Alzheimer's Disease Biomarkers in Hip Fracture Patients with Delirium. Dementia and Geriatric Cognitive Disorders Extra. ISSN 1664-5464. 7(3), p. 374–385. doi: 10.1159/000481853. Full text in Research Archive
  • Idland, Ane-Victoria; Wyller, Torgeir Bruun; Støen, Randi; Dahl, Gry Torsæter; Frihagen, Frede Jon & Brækhus, Anne [Show all 7 contributors for this article] (2017). Cerebrospinal Fluid Phosphate in Delirium after Hip Fracture. Dementia and Geriatric Cognitive Disorders Extra. ISSN 1664-5464. 7(3), p. 309–317. doi: 10.1159/000478723. Full text in Research Archive
  • Svenøy, Stian; WESTBERG, MARIANNE; Figved, Wender; Valland, Haldor; Brun, Ole-Christian Laahne & Wangen, Helge [Show all 8 contributors for this article] (2017). Posterior versus lateral approach for hemiarthroplasty after femoral neck fracture: Early complications in a prospective cohort of 583 patients. Injury. ISSN 0020-1383. 48(7), p. 1565–1569. doi: 10.1016/j.injury.2017.03.024.
  • Ernst, Gernot Walter; Watne, Leiv Otto; Frihagen, Frede Jon; Wyller, Torgeir Bruun; Dominik, Andreas & Rostrup, Morten (2017). Decreases in heart rate variability are associated with postoperative complications in hip fracture patients. PLOS ONE. ISSN 1932-6203. 12:e0180423(7), p. 1–14. doi: 10.1371/journal.pone.0180423. Full text in Research Archive
  • Guren, Ellen; Figved, Wender; Frihagen, Frede Jon; Watne, Leiv Otto & WESTBERG, MARIANNE (2017). Prosthetic joint infection?a devastating complication of hemiarthroplasty for hip fracture. Acta Orthopaedica. ISSN 1745-3674. 88(4), p. 383–389. doi: 10.1080/17453674.2017.1301009.
  • Bartels, Stefan; Gjertsen, Jan-Erik; Frihagen, Frede Jon; Rogmark, Cecilia & Utvåg, Stein-Erik (2017). High failure rate after internal fixation and beneficial outcome after arthroplasty in treatment of displaced femoral neck fractures in patients between 55 and 70 years. An observational study of 2,713 patients reported to the Norwegian Hip Fracture Register. Acta Orthopaedica. ISSN 1745-3674. 89(1), p. 53–58. doi: 10.1080/17453674.2017.1376514. Full text in Research Archive
  • Neerland, Bjørn Erik; Krogseth, Maria; Juliebø, Vibeke; Ranhoff, Anette Hylen; Engedal, Knut & Frihagen, Frede Jon [Show all 9 contributors for this article] (2017). Perioperative hemodynamics and risk for delirium and new onset dementia in hip fracture patients; A prospective follow-up study. PLOS ONE. ISSN 1932-6203. 12(7:e0180641), p. 1–18. doi: 10.1371/journal.pone.0180641. Full text in Research Archive
  • Tsukanaka, Masako; Støen, Ragnhild Øydna; Figved, Wender; Frihagen, Frede Jon; Nordsletten, Lars & Röhrl, Stephan Maximillian (2017). Steady state acetabular cartilage wear after bipolar hemiarthroplasty: a case series of 10 patients With radiostereometric analysis. HIP International. ISSN 1120-7000. 27(2), p. 193–197. doi: 10.5301/hipint.5000437.
  • Torbergsen, Anne Cathrine; Watne, Leiv Otto; Wyller, Torgeir Bruun; Frihagen, Frede Jon; Strømsøe, Knut & Bøhmer, Thomas [Show all 7 contributors for this article] (2017). Micronutrients and the risk of hip fracture: Case–control study. Clinical Nutrition. ISSN 0261-5614. 36(2), p. 438–443. doi: 10.1016/j.clnu.2015.12.014.
  • Idland, Ane-Victoria; Wyller, Torgeir Bruun; Støen, Randi; Eri, Lars Magne; Frihagen, Frede Jon & Ræder, Johan [Show all 13 contributors for this article] (2016). Preclinical amyloid-β and axonal degeneration pathology in delirium. Journal of Alzheimer's Disease. ISSN 1387-2877. 55(1), p. 371–379. doi: 10.3233/JAD-160461.
  • Hall, Roanna J.; Watne, Leiv Otto; Idland, Ane-Victoria; Ræder, Johan; Frihagen, Frede Jon & MacLullich, Alasdair M.J. [Show all 9 contributors for this article] (2016). Cerebrospinal fluid levels of neopterin are elevated in delirium after hip fracture. Journal of Neuroinflammation. ISSN 1742-2094. 13:170. doi: 10.1186/s12974-016-0636-1.
  • Neerland, Bjørn Erik; Hall, Roanna J.; Seljeflot, Ingebjørg; Frihagen, Frede Jon; MacLullich, Alasdair M.J. & Ræder, Johan [Show all 8 contributors for this article] (2016). Associations between delirium and preoperative cerebrospinal fluid C-reactive protein, interleukin-6, and interleukin-6 receptor in individuals with acute hip fracture. Journal of The American Geriatrics Society. ISSN 0002-8614. 64(7), p. 1456–1463. doi: 10.1111/jgs.14238.
  • Watne, Leiv Otto; Idland, Ane-Victoria; Fekkes, Durk; Ræder, Johan; Frihagen, Frede Jon & Ranhoff, Anette Hylen [Show all 9 contributors for this article] (2016). Increased CSF levels of aromatic amino acids in hip fracture patients with delirium suggests higher monoaminergic activity. BMC Geriatrics. ISSN 1471-2318. 16(149). doi: 10.1186/s12877-016-0324-0. Full text in Research Archive
  • Hov, Karen Roksund; Berg, Jens Petter; Frihagen, Frede Jon; Ræder, Johan; Hall, Roanna J. & Wyller, Torgeir Bruun [Show all 7 contributors for this article] (2016). Blood-cerebrospinal fluid barrier integrity in delirium determined by Q-Albumin. Dementia and Geriatric Cognitive Disorders. ISSN 1420-8008. 41(3-4), p. 192–198. doi: 10.1159/000443789.
  • 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
  • Krogseth, Maria; Watne, Leiv Otto; Juliebø, Vibeke; Skovlund, Eva; Engedal, Knut & Frihagen, Frede Jon [Show all 7 contributors for this article] (2016). Delirium is a risk factor for further cognitive decline in cognitively impaired hip fracture patients. Archives of gerontology and geriatrics (Print). ISSN 0167-4943. 64, p. 38–44. doi: 10.1016/j.archger.2015.12.004.
  • Slobogean, Gerard P.; Giannoudis, Peter V.; Frihagen, Frede Jon; Forte, Mary L; Morshed, Saam & Bhandari, Mohit (2015). Bigger data, bigger problems. Journal of Orthopaedic Trauma. ISSN 0890-5339. 29, p. S43–S46. doi: 10.1097/BOT.0000000000000463.
  • WESTBERG, MARIANNE; Frihagen, Frede Jon; Brun, Ole-Christian Laahne; Figved, Wender; Grøgaard, Bjarne & Valland, Haldor [Show all 8 contributors for this article] (2015). Effectiveness of Gentamicin-containing collagen sponges for prevention of surgical site infection after hip arthroplasty: A multicenter randomized trial. Clinical Infectious Diseases. ISSN 1058-4838. 60(12), p. 1752–1759. doi: 10.1093/cid/civ162.
  • ANDERSEN, METTE RENATE; Frihagen, Frede Jon; Madsen, Jan Erik & Figved, Wender (2015). High complication rate after syndesmotic screw removal. Injury. ISSN 0020-1383. 46(11), p. 2283–2287. doi: 10.1016/j.injury.2015.08.021.
  • Williksen, John Håkon; Husby, Torstein; Hellund, Johan Castberg; Kvernmo, Hebe Desiree; Rosales, Carina & Frihagen, Frede Jon (2015). External fixation and adjuvant pins versus volar locking plate fixation in unstable distal radius fractures: A randomized, controlled study with a 5-year follow-up. Journal of Hand Surgery-American Volume. ISSN 0363-5023. 40(7), p. 1333–1340. doi: 10.1016/j.jhsa.2015.03.008.
  • Torbergsen, Anne Cathrine; Watne, Leiv Otto; Frihagen, Frede Jon; Wyller, Torgeir Bruun; Brugård, Anniken & Mowe, Morten (2015). Vitamin deficiency as a risk factor for delirium. European Geriatric Medicine. ISSN 1878-7649. 6(4), p. 314–318. doi: 10.1016/j.eurger.2014.09.002.
  • Bhandari, Mohit; Devereaux, Philip J.; Einhorn, Thomas A.; Thabane, Lehana; Schemitsch, Emil H. & Koval, Kenneth J. [Show all 13 contributors for this article] (2015). Hip fracture evaluation with alternatives of total hip arthroplasty versus hemiarthroplasty (HEALTH): Protocol for a multicentre randomised trial. BMJ Open. ISSN 2044-6055. 5(2). doi: 10.1136/bmjopen-2014-006263.
  • Torbergsen, Anne Cathrine; Watne, Leiv Otto; Wyller, Torgeir Bruun; Frihagen, Frede Jon; Strømsøe, Knut & Bøhmer, Thomas [Show all 7 contributors for this article] (2015). Vitamin K1 and 25(OH)D are independently and synergistically associated with a risk for hip fracture in an elderly population: A case control study. Clinical Nutrition. ISSN 0261-5614. 34(1), p. 101–106. doi: 10.1016/j.clnu.2014.01.016.
  • Watne, Leiv Otto; Torbergsen, Anne Cathrine; Conroy, Simon; Engedal, Knut ; Frihagen, Frede & Hjorthaug, Geir Aasmund [Show all 11 contributors for this article] (2014). The effect of a pre- and postoperative orthogeriatric service on cognitive function in patients with hip fracture: Randomized controlled trial (Oslo Orthogeriatric Trial). BMC Medicine. ISSN 1741-7015. 12(1). doi: 10.1186/1741-7015-12-63. Full text in Research Archive
  • Støen, Ragnhild Øydna; Lofthus, Cathrine Marie; Nordsletten, Lars; Madsen, Jan Erik & Frihagen, Frede Jon (2014). Randomized trial of hemiarthroplasty versus internal fixation for femoral neck fractures: no differences at 6 years. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 472(1), p. 360–367. doi: 10.1007/s11999-013-3245-7.
  • Watne, Leiv Otto; Hall, Roanna J.; Molden, Espen; Ræder, Johan; Frihagen, Frede Jon & MacLullich, Alasdair M.J. [Show all 10 contributors for this article] (2014). Anticholinergic activity in cerebrospinal fluid and serum in individuals with hip fracture with and without delirium. Journal of The American Geriatrics Society. ISSN 0002-8614. 62(1), p. 94–102. doi: 10.1111/jgs.12612.
  • Langslet, Ellen; Frihagen, Frede Jon; Opland, Vidar; Madsen, Jan Erik; Nordsletten, Lars & Figved, Wender (2014). Cemented versus Uncemented Hemiarthroplasty for Displaced Femoral Neck Fractures: 5-year Followup of a Randomized Trial. Clinical Orthopaedics and Related Research. ISSN 0009-921X. 472(4), p. 1291–1299. doi: 10.1007/s11999-013-3308-9.
  • Skaara, Helene Engberg; Moksnes, Håvard; Frihagen, Frede Jon & Stuge, Britt (2013). Self-reported and performance-based functional outcomes after surgical repair of proximal hamstring avulsions. American Journal of Sports Medicine. ISSN 0363-5465. 41(11), p. 2577–2584. doi: 10.1177/0363546513499518.
  • Williksen, John Håkon; Frihagen, Frede Jon; Hellund, Johan Castberg; Kvernmo, Helene Ballo & Husby, Torstein (2013). Volar Locking Plates Versus External Fixation and Adjuvant Pin Fixation in Unstable Distal Radius Fractures: A Randomized, Controlled Study. Journal of Hand Surgery-American Volume. ISSN 0363-5023. 38A(8), p. 1469–1476. doi: 10.1016/j.jhsa.2013.04.039.
  • WESTBERG, MARIANNE; Snorrason, Finnur & Frihagen, Frede Jon (2013). Preoperative waiting time increased the risk of periprosthetic infection in patients with femoral neck fracture. Acta Orthopaedica. ISSN 1745-3674. 84(2), p. 124–129. doi: 10.3109/17453674.2013.775044.
  • Wyller, Torgeir Bruun; Watne, Leiv Otto; Torbergsen, Anne Cathrine; Engedal, Knut Arne; Frihagen, Frede Jon & Juliebø, Vibeke [Show all 10 contributors for this article] (2012). The effect of a pre- and post-operative orthogeriatric service on cognitive function in patients with hip fracture. The protocol of the Oslo Orthogeriatrics Trial. BMC Geriatrics. ISSN 1471-2318. 12(36). doi: 10.1186/1471-2318-12-36. Full text in Research Archive
  • Støen, Ragnhild Øydna; Nordsletten, Lars; Meyer, Haakon E; Frihagen, Frede Jon; Falch, Jan Arvid & Lofthus, Cathrine Marie (2012). Hip fracture incidence is decreasing in the high incidence area of Oslo, Norway. Osteoporosis International. ISSN 0937-941X. 23(10), p. 2527–2534. doi: 10.1007/s00198-011-1888-3.
  • Schizas, Nikos; Weiss, Rudiger; Lian, Øystein Bjerkestrand; Frihagen, Frede Jon; Bahr, Roald & Ackermann, Paul W. (2012). Glutamate receptors in tendinopathic patients. Journal of Orthopaedic Research. ISSN 0736-0266. 30(9), p. 1447–1452. doi: 10.1002/jor.22094.
  • Robstad, Bjørn; Frihagen, Frede Jon & Nordsletten, Lars (2012). The rate of hip osteoarthritis in patients with proximal femoral fractures versus hip contusion. Osteoporosis International. ISSN 0937-941X. 23(3), p. 901–905. doi: 10.1007/s00198-011-1628-8.
  • Bjørnelv, Gudrun Maria Waaler; Frihagen, Frede Jon; Madsen, Jan Erik; Nordsletten, Lars & Aas, Eline (2012). Hemiarthroplasty compared to internal fixation with percutaneous cannulated screws as treatment of displaced femoral neck fractures in the elderly: cost-utility analysis performed alongside a randomized, controlled trial. Osteoporosis International. ISSN 0937-941X. 23(6), p. 1711–1719. doi: 10.1007/s00198-011-1772-1.
  • Figved, Wender; Dahl, Jon; Snorrason, Finnur; Frihagen, Frede Jon; Röhrl, Stephan Maximillian & Madsen, Jan Erik [Show all 7 contributors for this article] (2012). Radiostereometric analysis of hemiarthroplasties of the hip - a highly precise method for measurements of cartilage wear. Osteoarthritis and Cartilage. ISSN 1063-4584. 20(1), p. 36–42. doi: 10.1016/j.joca.2011.11.006.
  • Schizas, Nikos; Lian, Øystein; Frihagen, Frede Jon; Engebretsen, Lars; Bahr, Roald & Ackermann, Paul W (2010). Coexistence of up-regulated NMDA receptor 1 and glutamate on nerves, vessels and transformed tenocytes in tendinopathy. Scandinavian Journal of Medicine & Science in Sports. ISSN 0905-7188. 20(2), p. 208–215. doi: 10.1111/j.1600-0838.2009.00913.x.
  • Frihagen, Frede Jon; Figved, Wender; Madsen, Jan Erik; Lofthus, Cathrine Marie; Støen, Ragnhild Øydna & Nordsletten, Lars (2010). Behandling av lårhalsbrudd :. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 130(16), p. 1614–1617. doi: 10.4045/tidsskr.09.1264.

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  • Sermon, An; Slock, Cedric; Coeckelberghs, Ellen; Seys, Deborah; Panella, Massimiliano & Bruyneel, Luk [Show all 21 contributors for this article] (2022). Correction to: Quality indicators in the treatment of geriatric hip fractures: literature review and expert consensus (Archives of Osteoporosis, (2021), 16, 1, (152), 10.1007/s11657-021-00995-6). Archives of Osteoporosis. ISSN 1862-3522. 17(1). doi: 10.1007/s11657-022-01091-z.
  • Nordbø, Jakob Vangen; Frihagen, Frede Jon & Solberg, Lene Bergendal (2020). Fastlegens rolle ved osteoporosebehandling etter brudd. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 17, p. 1738–1739. doi: 10.4045/tidsskr.20.0822.
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Andreasen, Camilla; Brunborg, Cathrine & Hübschle, Lars Michael [Show all 17 contributors for this article] (2019). Determinants of Trabecular Bone Score and Vertebral Fracture Status in Women With Fragility Fractures: A Cross-sectional Sub-study of NoFRACT .
  • Borgen, Tove Tveitan; Bjørnerem, Åshild; Solberg, Lene Bergendal; Brunborg, Cathrine; Andreasen, Camilla & Hübschle, Lars Michael [Show all 18 contributors for this article] (2019). Individuals with Central Fractures have More Prevalent Vertebral Fractures, Lower Trabecular Bone Score and Lower BMD than Individuals with Peripheral Fractures: a Sub-study of NoFRACT .
  • Hedström, Margareta; Ekström, Wilhelmina; Al-Ani, Amer; Campenfeldt, Pierre; Bartels, Stefan & Gjertsen, Jan-Erik [Show all 9 contributors for this article] (2019). High failure rate after internal fixation and beneficial outcome after arthroplasty in treatment of displaced femoral neck fractures in patients between 55 and 70 years. Acta Orthopaedica. ISSN 1745-3674. 90(1), p. 94–95. doi: 10.1080/17453674.2018.1556875.
  • Andreasen, Camilla; G. Rogli, Veronica; Elvenes, Jan; Joakimsen, Ragnar Martin; Borgen, Tove Tveitan & Solberg, Lene Bergendal [Show all 13 contributors for this article] (2018). Tromsoporosis - Secondary Fracture Prevention Program resulted in improved adherence to anti-osteoporotic drugs in Tromsø, Norway.
  • Andreasen, Camilla; G. Rogli, Veronica; Elvenes, Jan; Joakimsen, Ragnar Martin; Borgen, Tove Tveitan & Solberg, Lene Bergendal [Show all 13 contributors for this article] (2018). Tromsoporosis - Secondary Fracture Prevention Program resulted in high adherence to anti-osteoporotic drugs in Tromsø, Norway.
  • Andreasen, Camilla; G. Rogli, Veronica; Elvenes, Jan; Joakimsen, Ragnar Martin; Borgen, Tove Tveitan & Solberg, Lene Bergendal [Show all 13 contributors for this article] (2018). Tromsoporosis - Secondary Fracture Prevention Program resulted in high adherence to anti-osteoporotic drugs in Tromsø, Norway.
  • Pettersen, Petter Morten; Frihagen, Frede Jon; Saltvedt, Ingvild & Figved, Wender (2018). På tide å innføre ortogeriatri i Norge? Tidsskrift for Den norske legeforening. ISSN 0029-2001. 138(14), p. 1320–1321. doi: 10.4045/tidsskr.18.0485.
  • Andreasen, Camilla; Osima, Marit; Rognli, Veronica; Grundel, Dag; Elvenes, Jan & Knutsen, Gunnar [Show all 17 contributors for this article] (2017). Tromsoporosis - Adherence to a Secondary Fracture Prevention Program in Tromsø, Norway.
  • Johnsen, Lars Gunnar; Watne, Leiv Otto; Frihagen, Frede Jon; Helbostad, Jorunn L.; Prestmo, Anders & Saltvedt, Ingvild [Show all 8 contributors for this article] (2015). Hvorfor ortogeriatri? Tidsskrift for Den norske legeforening. ISSN 0029-2001. 135(6), p. 523–524. doi: 10.4045/tidsskr.15.0188.
  • Frihagen, Frede Jon; Sandnes, Øystein Drolsum & Støen, Ragnhild (2013). POOR CLINICAL RESULTS AFTER INTERNAL FIXATION OF UNDISPLACED FEMORAL NECK FRACTURES. Osteoporosis International. ISSN 0937-941X. 24, p. S200–S200.
  • Frihagen, Frede Jon; Madsen, Jan Erik; Nordsletten, Lars; Lofthus, Cathrine Marie & Støen, Ragnhild Øydna (2013). HEMIARTHROPLASTY OR INTERNAL FIXATION FOR DISPLACED FEMORAL NECK FRACTURES IN THE ELDERLY: 6 YEAR FOLLOW UP OF AN RCT. Osteoporosis International. ISSN 0937-941X. 24, p. S135–S135.
  • Frihagen, Frede Jon; Støen, Ragnhild Øydna; Hygen, Hans Olav; Nordsletten, Lars & Lofthus, Cathrine Marie (2011). ICE AND SNOW IN OSLO GAVE A MARKED INCREASE IN DISTAL RADIUS FRACTURES, BUT NOT IN HIP FRACTURES. Osteoporosis International. ISSN 0937-941X. 22, p. 159–160.
  • Frihagen, Frede Jon; Figved, Wender; Madsen, Jan Erik; Lofthus, Cathrine Marie; Støen, Ragnhild Øydna & Nordsletten, Lars (2010). F. Frihagen og medarbeidere svarer: :. Tidsskrift for Den norske legeforening. ISSN 0029-2001. 130(20).
  • Hagen, Gunhild; Wisløff, Torbjørn; Falch, Jan; Lofthus, Cathrine; Frihagen, Frede & Wensaas, Knut-Arne [Show all 10 contributors for this article] (2011). Efficacy and cost-effectiveness of alendronate for the prevention of fractures in postmenopausal women in Norway. Nasjonalt kunnskapssenter for helsetjenesten. ISSN 978-82-8121-406-4.

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Published Sep. 1, 2020 2:19 PM - Last modified Sep. 1, 2020 2:19 PM