Øyvind Næss

• Ariansen, Inger; Strand, Bjørn Heine; Kjøllesdal, Marte Karoline Råberg; Steingrímsdóttir, Ólöf Anna; Mortensen, Laust Hvas; Stigum, Hein; Graff-Iversen, Sidsel & Næss, Øyvind (2019). The educational gradient in premature cardiovascular mortality: Examining mediation by risk factors in cohorts born in the 1930s, 1940s and 1950s. European Journal of Preventive Cardiology.  ISSN 2047-4873.  26(10), s 1096- 1103 . doi: 10.1177/2047487319826274 Fulltekst i vitenarkiv.
• Fossum, Stine; Næss, Øyvind; Halvorsen, Sigrun; Tell, Grethe S. & Vikanes, Åse (2019). Long-term cardiovascular morbidity following hyperemesis gravidarum: A Norwegian nationwide cohort study. PLOS ONE.  ISSN 1932-6203.  14:e0218051(6), s 1- 12 . doi: 10.1371/journal.pone.0218051 Fulltekst i vitenarkiv.
• Heiberg, Ina Heidi; Jacobsen, Bjarne K.; Balteskard, Lise; Bramness, Jørgen Gustav; Næss, Øyvind; Ystrøm, Eivind; Reichborn-Kjennerud, Ted; Hultman, Christina M.; Nesvåg, Ragnar & Høye, Anne (2019). Undiagnosed cardiovascular disease prior to cardiovascular death in individuals with severe mental illness. Acta Psychiatrica Scandinavica.  ISSN 0001-690X.  139(6), s 558- 571 . doi: 10.1111/acps.13017 Fulltekst i vitenarkiv.
• Kjøllesdal, Marte Karoline Råberg; Degerud, Eirik Magnus Meek & Næss, Øyvind (2019). The association between obesity and cardiovascular disease mortality in different strata of lifecourse socioeconomic position. Evidence from pooled Norwegian health surveys.. European Journal of Public Health.  ISSN 1101-1262. . doi: 10.1093/eurpub/ckz141 Vis sammendrag

  BACKGROUND: Socioeconomic position (SEP) is related to both obesity and cardiovascular disease (CVD). There is little evidence on whether SEP modifies the relation between obesity and CVD. The aim of the study was to investigate whether the association between obesity and CVD mortality is stronger among people with disadvantaged than among people with advantaged life course SEP. METHODS: Data from Norwegian population-based cardiovascular health surveys (1985-2003), including body mass index and CVD risk factors (cholesterol, blood pressure, smoking, current treatment for hypertension) were linked to socioeconomic indicators from register and census data (1960-90), and to the Cause of Death Registry (up until 2014). The total number of participants was 398 297. RESULTS: In comparison with normal weight, the age-adjusted hazard ratios and 95% confidence intervals of CVD mortality among obese participants were 2.39 (2.07-2.75) and 2.08 (1.70-2.53) among men and women with high SEP, respectively and 1.88 (1.60-2.21) and 1.75 (1.43-2.14) among men and women with low SEP. Adjustment for CVD risk factors attenuated the results in a similar manner in all SEP groups, and among both women and men. CONCLUSION: Obesity was consistently associated with a higher risk of CVD mortality, with only minor variation according to SEP. This means that preventing or treating obesity is, for the purpose of reducing CVD risk, equally important for an individual with high or low SEP.

• Kollerud, Ruby Del Risco; Ruud, Ellen; Haugnes, Hege Sagstuen; Cannon-Albright, Lisa A.; Thoresen, Magne; Nafstad, Per; Vlatkovic, Ljiljana; Blaasaas, Karl Gerhard; Næss, Øyvind & Claussen, Bjørgulf (2019). Family history of cancer and risk of paediatric and young adult’s testicular cancer: A Norwegian cohort study. British Journal of Cancer.  ISSN 0007-0920.  120, s 1007- 1014 . doi: 10.1038/s41416-019-0445-2
• Degerud, Eirik; Ariansen, Inger Kristine Holtermann; Ystrøm, Eivind; Graff-Iversen, Sidsel; Høiseth, Gudrun; Mørland, Jørg; Smith, George Davey & Næss, Øyvind (2018). Life course socioeconomic position, alcohol drinking patterns in midlife, and cardiovascular mortality: Analysis of Norwegian population-based health surveys. PLoS Medicine.  ISSN 1549-1277.  15(1) . doi: 10.1371/journal.pmed.1002476 Fulltekst i vitenarkiv.
• Ebbing, Marta; Reneflot, Anne; Hjellvik, Vidar; Næss, Øyvind & Meltzer, Helle Margrete (2018). Kunnskapskilder for folkehelse, I: Else Karin Grøholt; Linn Bøhler & Hanna Hånes (red.),  Folkehelserapporten - Helsetilstanden i Norge.  Folkehelseinstituttet.  Kunnskapskilder for folkehelse.
• Fossum, Stine; Halvorsen, Sigrun; Vikanes, Åse Vigdis; Roseboom, Tessa J.; Ariansen, Inger Kristine Holtermann & Næss, Øyvind (2018). Cardiovascular risk profile at the age of 40?45 in women with previous hyperemesis gravidarum or hypertensive disorders in pregnancy: A population-based study. Pregnancy Hypertension.  ISSN 2210-7789.  12, s 129- 135 . doi: 10.1016/j.preghy.2018.04.013
• Gebremariam, Mekdes Kebede; Arah, Onyebuchi A.; Lien, Nanna; Næss, Øyvind; Ariansen, Inger Kristine Holtermann & Kjøllesdal, Marte Karoline Råberg (2018). Change in BMI Distribution over a 24-Year Period and Associated Socioeconomic Gradients: A Quantile Regression Analysis. Obesity.  ISSN 1930-7381.  26(4), s 769- 775 . doi: 10.1002/oby.22133 Vis sammendrag

  ObjectiveThis study assessed the change in body mass index (BMI) distribution among 18- or 19-year-olds over 24 years. It also investigated parallel changes in the distribution of birth weight and in the association between birth weight and later risk of overweight and/or obesity. Parental educational variations in the trends and associations were explored. MethodsThe study used data on 606,832 male military conscripts enlisted between 1985 and 2008. Quantile regression was used to assess the temporal change in BMI and birth weight distribution. The association between birth weight and overweight and/or obesity at age 18 or 19 years was quantified by using logistic regression. ResultsIncreases in BMI over time were found namely in the 90th, 95th, 97th, and 99th percentiles. Socioeconomic differences in this increase were documented in the 75th to 97th percentiles. The distribution of birth weight and the association between birth weight and the risk of overweight and/or obesity at age 18 or 19 years remained stable over time. ConclusionsThe difference in the increase in BMI between low and high percentiles indicates the limited role of mean BMI in reflecting population changes. The results suggest a need to focus on those with low socioeconomic position in the upper ends of the BMI distribution to combat increasing disparities in obesity-related outcomes.

• Graff-Iversen, Sidsel; Ariansen, Inger Kristine Holtermann; Næss, Øyvind; Selmer, Randi & Strand, Bjørn Heine (2018). Educational inequalities in midlife risk factors for non-communicable diseases in two Norwegian counties 1974–2002. Scandinavian Journal of Public Health.  ISSN 1403-4948. . doi: 10.1177/1403494818789325
• Heiberg, Ina Heidi; Jacobsen, Bjarne K.; Nesvåg, Ragnar; Bramness, Jørgen Gustav; Reichborn-Kjennerud, Ted; Næss, Øyvind; Ystrøm, Eivind; Hultman, Christina M. & Høye, Anne (2018). Total and cause-specific standardized mortality ratios in patients with schizophrenia and/or substance use disorder. PLOS ONE.  ISSN 1932-6203.  13(8) . doi: 10.1371/journal.pone.0202028 Fulltekst i vitenarkiv.
• Kjøllesdal, Marte Karoline Råberg; Smith, George Davey; Ariansen, Inger Kristine Holtermann; Kinge, Jonas Minet; Degerud, Eirik & Næss, Øyvind (2018). The association between BMI and mortality using early adulthood BMI as an instrumental variable for midlife BMI. Scientific Reports.  ISSN 2045-2322.  8(1) . doi: 10.1038/s41598-018-29089-z Fulltekst i vitenarkiv.
• Kollerud, Ruby Del Risco; Blaasaas, Karl Gerhard; Claussen, Bjørgulf; Nafstad, Per; Cannon-Albright, Lisa A.; Ruud, Ellen; Wesenberg, Finn & Næss, Øyvind (2018). Family history of cancer and the risk of childhood solid tumours: A Norwegian nationwide register-based cohort study. British Journal of Cancer.  ISSN 0007-0920.  118(6), s 905- 912 . doi: 10.1038/bjc.2017.493
• Shaikh, Fareeha; Kjøllesdal, Marte Karoline Råberg & Næss, Øyvind (2018). Offspring birth weight and cardiovascular mortality among parents: the role of cardiovascular risk factors. Journal of Developmental Origins of Health and Disease.  ISSN 2040-1744.  9(3), s 351- 357 . doi: 10.1017/S2040174418000065 Fulltekst i vitenarkiv.
• Ariansen, Inger Kristine; Mortensen, Laust Hvas; Graff-Iversen, Sidsel; Stigum, Hein; Kjøllesdal, Marte Karoline Råberg & Næss, Øyvind (2017). The educational gradient in cardiovascular risk factors: impact of shared family factors in 228,346 Norwegian siblings. BMC Public Health.  ISSN 1471-2458.  17(1) . doi: 10.1186/s12889-017-4123-0 Fulltekst i vitenarkiv.
• Degerud, Eirik; Ystrøm, Eivind; Tambs, Kristian; Ariansen, Inger Kristine; Mørland, Jørg; Magnus, Per; Davey Smith, George & Næss, Øyvind (2017). The interplay between cognitive ability, alcohol consumption, and health characteristics. Psychological Medicine.  ISSN 0033-2917.  48(12), s 2011- 2022 . doi: 10.1017/S0033291717003543 Fulltekst i vitenarkiv.
• Egeland, Grace M.; Tell, Grethe S.; Næss, Øyvind; Igland, Jannicke & Klungsøyr, Kari (2017). Association between pregravid physical activity and family history of stroke and risk of stillbirth: Population-based cohort study. BMJ Open.  ISSN 2044-6055.  7:e017034(8), s 1- 8 . doi: 10.1136/bmjopen-2017-017034 Fulltekst i vitenarkiv.
• Fossum, Stine; Vikanes, Åse Vigdis; Næss, Øyvind; Vos, Linda; Grotmol, Tom & Halvorsen, Sigrun (2017). Hyperemesis gravidarum and long-term mortality: a population-based cohort study. BJOG: an International Journal of Obstetrics and Gynaecology.  ISSN 1470-0328.  124(7), s 1080- 1087 . doi: 10.1111/1471-0528.14454 Fulltekst i vitenarkiv.
• Kjøllesdal, Marte Karoline Råberg; Ariansen, Inger Kristine; Mortensen, Laust H & Næss, Øyvind (2017). The importance of early life family factors in the association between cardiovascular risk factors and early cardiovascular mortality. Open heart.  ISSN 2053-3624.  4(2) . doi: 10.1136/openhrt-2017-000608 Fulltekst i vitenarkiv.
• Kollerud, Ruby Del Risco; Blaasaas, Karl Gerhard; Claussen, Bjørgulf; Oftedal, Bente Margaret & Næss, Øyvind (2017). The risk of cancer in the offspring and parental length of life. Cancer Epidemiology.  ISSN 1877-7821.  48, s 8- 15 . doi: 10.1016/j.canep.2017.02.012
• Næss, Øyvind; Mortensen, Laust H.; Vikanes, Åse Vigdis & Smith, George Davey (2017). Offspring sex and parental health and mortality. Scientific Reports.  ISSN 2045-2322.  7 . doi: 10.1038/s41598-017-05161-y Fulltekst i vitenarkiv.
• Birkemoe, Tone; Lindstedt, Heidi Elisabeth Heggen; Ottesen, Preben; Soleng, Arnulf; Næss, Øyvind & Rukke, Bjørn Arne (2016). Head lice predictors and infestation dynamics among primary school children in Norway. Family Practice.  ISSN 0263-2136.  33(1), s 23- 29 . doi: 10.1093/fampra/cmv081 Fulltekst i vitenarkiv.
• Egeland, Grace M.; Klungsøyr, Kari; Øyen, Nina; Tell, Grethe Seppola; Næss, Øyvind & Skjaerven, Rolv (2016). Preconception cardiovascular risk factor differences between gestational hypertension and preeclampsia: Cohort Norway study. Hypertension.  ISSN 0194-911X.  67(6), s 1173- 1180 . doi: 10.1161/HYPERTENSIONAHA.116.07099 Fulltekst i vitenarkiv.
• Kjøllesdal, Marte Karoline Råberg; Ariansen, Inger Kristine Holtermann; Mortensen, Laust Hvas; Smith, George Davey & Næss, Øyvind (2016). Educational differences in cardiovascular mortality - the role of shared family factors and cardiovascular risk factors. Scandinavian Journal of Public Health.  ISSN 1403-4948.  44(8), s 744- 750 . doi: 10.1177/1403494816669427
• Syse, Astri; Strand, Bjørn Heine; Næss, Øyvind; Steingrímsdóttir, Ólöf Anna & Kumar, Bernadette. N (2016). Differences in all-cause mortality: A comparison between immigrants and the host population in Norway 1990-2012. Demographic Research.  ISSN 1435-9871.  34, s 615- 655 . doi: 10.4054/DemRes.2016.34.22 Fulltekst i vitenarkiv.
• Ariansen, Inger; Graff-Iversen, Sidsel; Stigum, Hein; Strand, Bjørn Heine; Wills, Andrew K & Næss, Øyvind (2015). Do repeated risk factor measurements influence the impact of education on cardiovascular mortality?. Heart.  ISSN 1355-6037.  101(23), s 1889- 1894 . doi: 10.1136/heartjnl-2014-307380
• Ariansen, Inger; Mortensen, Laust; Igland, Jannicke; Tell, Grethe Seppola; Tambs, Kristian; Graff-Iversen, Sidsel; Strand, Bjørn Heine & Næss, Øyvind (2015). The educational gradient in coronary heart disease: the association with cognition in a cohort of 57 279 male conscripts. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  69(4), s 322- 329 . doi: 10.1136/jech-2014-204597
• Du, Qing; Lian, Wu; Næss, Øyvind; Bjertness, Espen; Kumar, Bernadette. N & Shi, Shu-hua (2015). The trends in maternal mortality between 1996 and 2009 in Guizhou, China: Ethnic differences and associated factors. Journal of Huazhong University of Science and Technology. Medical Sciences.  ISSN 1672-0733.  35(1), s 140- 146 . doi: 10.1007/s11596-015-1403-8
• Fiskå, Bendik Seth; Ariansen, Inger; Graff-Iversen, Sidsel; Tell, Grethe Seppola; Egeland, Grace M. & Næss, Øyvind (2015). Family history of premature myocardial infarction, life course socioeconomic position and coronary heart disease mortality - a Cohort of Norway (CONOR) study. International Journal of Cardiology.  ISSN 0167-5273.  190, s 302- 307 . doi: 10.1016/j.ijcard.2015.04.160
• Kinge, Jonas Minet; Steingrímsdóttir, Ólöf Anna; Moe, Joakim Oliu; Skirbekk, Vegard; Næss, Øyvind & Strand, Bjørn Heine (2015). Educational differences in life expectancy over five decades among the oldest old in Norway. Age and Ageing.  ISSN 0002-0729.  44(6), s 1040- 1045 . doi: 10.1093/ageing/afv128
• Omsland, Tone Kristin; Eisman, John A.; Næss, Øyvind; Center, Jacqueline R; Gjesdal, Clara Gram; Tell, Grethe Seppola; Emaus, Nina; Meyer, Haakon E; Søgaard, Anne-Johanne; Holvik, Kristin; Schei, Berit; Forsmo, Siri & Magnus, Jeanette H. (2015). Educational inequalities in post-hip fracture mortality: a NOREPOS studys. Journal of Bone and Mineral Research.  ISSN 0884-0431.  30(12), s 2221- 2228 . doi: 10.1002/jbmr.2579 Vis sammendrag

  Hip fractures are associated with high excess mortality. Education is an important determinant of health, but little is known about educational inequalities in post-hip fracture mortality. Our objective was to investigate educational inequalities in post-hip fracture mortality and to examine whether comorbidity or family composition could explain any association. We conducted a register-based population study of Norwegians aged 50 years and older from 2002 to 2010. We measured total mortality according to educational attainment in 56,269 hip fracture patients (NORHip) and in the general Norwegian population. Both absolute and relative educational inequalities in mortality in people with and without hip fracture were compared. There was an educational gradient in post-hip fracture mortality in both sexes. Compared with those with primary education only, the age-adjusted relative risk (RR) of mortality in hip fracture patients with tertiary education was 0.82 (95% confidence interval [CI] 0.77-0.87) in men and 0.79 (95% CI 0.75-0.84) in women. Additional adjustments for Charlson comorbidity index, marital status, and number of children did not materially change the estimates. Regardless of educational attainment, the 1-year age-adjusted mortality was three- to fivefold higher in hip fracture patients compared with peers in the general population without fracture. The absolute differences in 1-year mortality according to educational attainment were considerably larger in hip fracture patients than in the population without hip fracture. Absolute educational inequalities in mortality were higher after hip fracture compared with the general population without hip fracture and were not mediated by comorbidity or family composition. Investigation of other possible mediating factors might help to identify new targets for interventions, based on lower educational attainment, to reduce post-hip fracture mortality.

• Igland, Jannicke; Vollset, Stein Emil; Nygård, Ottar; Sulo, Gerhard; Sulo, Enxhela; Ebbing, Marta; Næss, Øyvind; Ariansen, Inger & Tell, Grethe Seppola (2014). Educational inequalities in 28 day and 1-year mortality after hospitalisation for incident acute myocardial infarction - A nationwide cohort study. International Journal of Cardiology.  ISSN 0167-5273.  177(3), s 874- 880 . doi: 10.1016/j.ijcard.2014.10.045
• Jansen, Mona Dverdal; Knudsen, Gun Peggy; Myhre, Ronny; Høiseth, Gudrun; Mørland, Jørg; Næss, Øyvind; Tambs, Kristian & Magnus, Per (2014). Genetic variants in loci 1p13 and 9p21 and fatal coronary heart disease in a Norwegian case-cohort study. Molecular Biology Reports.  ISSN 0301-4851.  41(5), s 2733- 2743 . doi: 10.1007/s11033-014-3096-7
• Strand, Bjørn Heine; Steingrímsdóttir, Ólöf Anna; Grøholt, Else-Karin; Ariansen, Inger; Graff-Iversen, Sidsel & Næss, Øyvind (2014). Trends in educational inequalities in cause specific mortality in Norway from 1960 to 2010: a turning point for educational inequalities in cause specific mortality of Norwegian men after the millennium?. BMC Public Health.  ISSN 1471-2458.  14 . doi: 10.1186/1471-2458-14-1208 Fulltekst i vitenarkiv.
• Claussen, Bjørgulf; Næss, Øyvind; Reime, Leif Jostein & Leyland, Alastair H (2013). Proof firm downsizing and diagnosis-specific disability pensioning in Norway. BMC Public Health.  ISSN 1471-2458.  13 . doi: 10.1186/1471-2458-13-27 Fulltekst i vitenarkiv.
• Graff-Iversen, Sidsel; Jansen, Mona Dverdal; Hoff, Dominic Anthony; Høiseth, Gudrun; Knudsen, Gun Peggy; Magnus, Per; Mørland, Jørg; Normann, Per Trygve; Næss, Øyvind & Tambs, Kristian (2013). Divergent associations of drinking frequency and binge consumption of alcohol with mortality within the same cohort. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  67(4), s 350- 357 . doi: 10.1136/jech-2012-201564
• Høiseth, Gudrun; Magnus, Per; Knudsen, Gun Peggy; Jansen, Mona Dverdal; Næss, Øyvind; Tambs, Kristian & Mørland, Jørg (2013). Is ADH1C genotype relevant for the cardioprotective effect of alcohol?. Alcohol.  ISSN 0741-8329.  47(2), s 81- 84 . doi: 10.1016/j.alcohol.2012.12.005
• Næss, Øyvind & Hoff, Dominic Anthony (2013). The Norwegian Family Based Life Course (NFLC) study: data structure and potential for public health research. International Journal of Public Health.  ISSN 1661-8556.  58(1), s 57- 64 . doi: 10.1007/s00038-012-0379-4
• Næss, Øyvind; Stoltenberg, Camilla; Hoff, Dominic Anthony; Nystad, Wenche; Magnus, Per; Tverdal, Aage & Smith, George Davey (2013). Cardiovascular mortality in relation to birth weight of children and grandchildren in 500 000 Norwegian families. European Heart Journal.  ISSN 0195-668X.  34(44), s 3427- 3436 . doi: 10.1093/eurheartj/ehs298
• Strand, Bjørn Heine; Langballe, Ellen Melbye; Hjellvik, Vidar; Handal, Marte; Næss, Øyvind; Knudsen, Gun Peggy; Refsum, Helga; Tambs, Kristian; Nafstad, Per; Schirmer, Henrik; Bergem, Astrid Liv Mina; Selmer, Randi; Engedal, Knut Arne; Magnus, Per & Bjertness, Espen (2013). Midlife vascular risk factors and their association with dementia deaths: Results from a Norwegian prospective study followed up for 35 years. Journal of Neurological Sciences.  ISSN 1302-1664.  324(1-2), s 124- 130 . doi: 10.1016/j.jns.2012.10.018
• Zarre Dooghabadi, Malihe; Hjortland, Håkon André; Næss, Øyvind; Lee, Kin Keung & Lande, Tor Sverre (2013). An IR-UWB Transmitter for Ranging Systems. IEEE transactions on circuits and systems - 2, Analog and digital signal processing.  ISSN 1057-7130.  60(11), s 721- 725 . doi: 10.1109/TCSII.2013.2281909
• Fleten, Anne Caroline; Nystad, Wenche; Stigum, Hein; Skjaerven, Rolv; Lawlor, Debbie A.; Smith, George Davey & Næss, Øyvind (2012). Parent-Offspring Body Mass Index Associations in the Norwegian Mother and Child Cohort Study: A Family-based Approach to Studying the Role of the Intrauterine Environment in Childhood Adiposity. American Journal of Epidemiology.  ISSN 0002-9262.  176(2), s 83- 92 . doi: 10.1093/aje/kws134
• Gray, Linsay; Merlo, Juan; Mindell, Jennifer; Hallqvist, Johan; Tafforeau, Jean; O'Reilly, Dermot; Regidor, Enrique; Næss, Øyvind; Kelleher, Cecily; Helakorpi, Satu; Lange, Cornelia & Leyland, Alastair H (2012). International differences in self-reported health measures in 33 major metropolitan areas in Europe. European Journal of Public Health.  ISSN 1101-1262.  22(1), s 40- 47 . doi: 10.1093/eurpub/ckq170
• Køpp, Unni Mette Stamnes; Andersen, Lene Frost; Dahl-Jørgensen, Knut; Stigum, Hein; Næss, Øyvind & Nystad, Wenche (2012). Maternal pre-pregnant body mass index, maternal weight change and offspring birthweight. Acta Obstetricia et Gynecologica Scandinavica.  ISSN 0001-6349.  91(2), s 243- 249 . doi: 10.1111/j.1600-0412.2011.01321.x
• Køpp, Unni Mette Stamnes; Dahl-Jørgensen, Knut; Stigum, Hein; Andersen, Lene Frost; Næss, Øyvind & Nystad, Wenche (2012). The associations between maternal pre-pregnancy body mass index or gestational weight change during pregnancy and body mass index of the child at 3 years of age. International Journal of Obesity.  ISSN 0307-0565.  36(10), s 1325- 1331 . doi: 10.1038/ijo.2012.140
• Madsen, Christian; Rosland, Pål; Hoff, Dominic Anthony; Nystad, Wenche; Nafstad, Per & Næss, Øyvind (2012). The short-term effect of 24-h average and peak air pollution on mortality in Oslo, Norway. European Journal of Epidemiology (EJE).  ISSN 0393-2990.  27(9), s 717- 727 . doi: 10.1007/s10654-012-9719-1
• Moe, Joakim Oliu; Steingrímsdóttir, Ólöf Anna; Strand, Bjørn Heine; Grøholt, Else-Karin & Næss, Øyvind (2012). Trends in educational inequalities in old age mortality in Norway 1961-2009: a prospective register based population study. BMC Public Health.  ISSN 1471-2458.  12(911) . doi: 10.1186/1471-2458-12-911 Fulltekst i vitenarkiv. Vis sammendrag

  Background The vast majority of deaths occur in older adults. Paradoxically, knowledge on long-term trends in mortality inequalities among the aged, and particularly for those aged 80 years and over, is sparse. The historical trends in size and impact of socioeconomic inequalities on old age mortality are important to monitor because they may give an indication on future burden of inequalities. We investigated trends in absolute and relative educational inequalities on old age mortality in Norway between 1961 and 2009. Methods We did a register-based population study covering the entire Norwegian population aged 65-94 in the years 1961-2009 (1,534,513 deaths and 29,312,351 person years at risk). By examining 1-year mortality rates by gender, age and educational level we estimated trends in mortality rate ratios and rate differences. Results On average, age-standardised absolute inequalities increased by 0.17 deaths per 1000 person-years per year in men (P<0.001), and declined by 0.07 deaths per 1000 person-years per year in women (P<0.001). Trends in rate differences were largest in men aged 75-84 years, but differed in direction by age group in women. The corresponding mean increase in age-standardised relative inequalities was 0.4% and 0.1% per year in men and women, respectively (P<0.001). Trends in rate ratios were largest in the youngest age groups for both genders and negligible among women aged 85-94 years. Conclusions While relative educational inequalities in old age mortality increased for both genders, absolute educational inequalities increased only temporarily in men and changed little among women. Our study show the importance of including absolute measures in inequality research in order to present a more complete picture of the burden of inequalities to policy makers. As even in older ages, inequalities represent an unexploited potential to public health, old age inequalities will become increasingly important as many countries are facing aging populations.

• Moe, Joakim Oliu; Steingrímsdóttir, Ólöf Anna; Strand, Bjørn Heine & Næss, Øyvind (2012). Trends in remaining life expectancy at retirement age (65 years) by educational level in Norway 1961-2009 :. Norsk Epidemiologi.  ISSN 0803-2491.  22(2), s 85- 94 Fulltekst i vitenarkiv. Vis sammendrag

  Background: Over the last half a century education based inequalities in life expectancy have increased in younger populations, but our knowledge of long-term trends in old-age life expectancy differentials is sparse. We investigated the trends in remaining life expectancy at age 65 (e65) according to education in Norway for the period 1961-2009. Methods: This was a register-based population study including all Norwegian residents aged 65 years and older. Individual-level data were provided by the Central Population Registry and the National Educational Database. We classified education into higher and lower education and constructed one life table for each calendar year, sex, and educational group. We tested for trends using weighted least square regression models. Results: e65 increased over the observation period for all educational groups, but the difference in e65 increased by 0.060 life years per calendar year in men and 0.025 life years per calendar year in women (P < 0.001). The increase in e65 in less-educated men slowed in the 1980s and 1990s, whereas e65 in less-educated women decelerated from the 1980s, and significantly so from 2001 (P = 0.029). Conclusions: Educational-based inequalities in e65 increased over the last half century. The increase seems to be temporal in men and might be ongoing in women. Increasing inequalities in e65 challenge public health policy and will become increasingly important in the ageing societies of the future. In addition, they imply increasing deviation from the overall life expectancy of the population, which forms the basis of the recently implemented adjustment of pension levels according to life expectancy. Divergent trends in e65 according to educational level may also have implications for future demographic projections.

• Næss, Øyvind; Hoff, Dominic Anthony; Lawlor, Debbie & Mortensen, Laust H (2012). Education and adult cause-specific mortality - examining the impact of family factors shared by 871 367 Norwegian siblings. International Journal of Epidemiology.  ISSN 0300-5771.  41(6), s 1683- 1691 . doi: 10.1093/ije/dys143
• Steingrímsdóttir, Ólöf Anna; Næss, Øyvind; Moe, Joakim Oliu; Grøholt, Else-Karin; Thelle, Dag Steinar; Strand, Bjørn Heine & Bævre, Kåre (2012). Trends in life expectancy by education in Norway 1961-2009. European Journal of Epidemiology (EJE).  ISSN 0393-2990.  27(3), s 163- 171 . doi: 10.1007/s10654-012-9663-0
• Sudalaiyandi, Shanthi; Hjortland, Håkon André; Vu, Tuan Anh; Næss, Øyvind & Lande, Tor Sverre (2012). Live Demonstration: IR-UWB Transceiver with Localization Based on ToF Technique Suitable for Wireless Capsule Endoscopy. IEEE Transactions on Biomedical Circuits and Systems.  ISSN 1932-4545.  s 89- 89
• Magnus, Per; Bakke, Eirin; Hoff, Dominic Anthony; Høiseth, Gudrun; Graff-Iversen, Sidsel; Knudsen, Gun Peggy; Myhre, Ronny; Normann, Per Trygve; Næss, Øyvind; Tambs, Kristian; Thelle, Dag Steinar & Mørland, Jørg (2011). Controlling for high-density lipoprotein cholesterol does not affect the magnitude of the relationship between alcohol and coronary heart disease. Circulation.  ISSN 0009-7322.  124(21), s 2296- 2302 . doi: 10.1161/CIRCULATIONAHA.111.036491
• Madsen, Christian; Gehring, Ulrike; Walker, Sam-Erik; Brunekreef, Bert; Stigum, Hein; Næss, Øyvind Erik & Nafstad, Per (2010). Ambient air pollution exposure, residential mobility and term birth weight in Oslo, Norway. Environmental Research.  ISSN 0013-9351.  110(4), s 363- 371 . doi: 10.1016/j.envres.2010.02.005
• Næss, Øyvind Erik & Leyland, Alastair H (2010). Analysing the effect of area of residence over the life course in multilevel epidemiology. Scandinavian Journal of Public Health.  ISSN 1403-4948.  38, s 119- 126 . doi: 10.1177/1403494810384646
• Strand, Bjørn Heine; Grøholt, Else-Karin; Steingrímsdóttir, Ólöf Anna; Blakely, Tony; Graff-Iversen, Sidsel & Næss, Øyvind Erik (2010). Educational inequalities in mortality over four decades in Norway: prospective study of middle aged men and women followed for cause specific mortality, 1960-2000. BMJ. British Medical Journal.  ISSN 0959-8146.  340 . doi: 10.1136/bmj.c654
• Elstad, Jon Ivar & Næss, Øyvind Erik (2009). Genetikk og sosial ulikhet i helse, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kap.12.  s 232 - 246
• Mæland, John Gunnar; Elstad, Jon Ivar & Næss, Øyvind Erik (2009). Sosial epidemiologi - et nytt fagfelt med tradisjoner, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kap.1.  s 15 - 30
• Du, Qing; Næss, Øyvind; Bergsjø, Per & Kumar, Bernadette. N (2009). Determinants for high maternal mortality in multiethnic populations in western China. Health Care for Women International.  ISSN 0739-9332.  30(11), s 957- 970 . doi: 10.1080/07399330903052137
• Elstad, Jon Ivar & Næss, Øyvind (2009). Genetikk og sosial ulikhet i helse, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Del.  s 234 - 250
• Leyland, Alastair H & Næss, Øyvind Erik (2009). The effect of area of residence over the life course on subsequent mortality. Journal of the Royal Statistical Society: Series A (Statistics in Society).  ISSN 0964-1998.  172(3), s 555- 578 . doi: 10.1111/j.1467-985X.2008.00581.x
• Mæland, John Gunnar; Westin, Steinar; Elstad, Jon Ivar & Næss, Øyvind (2009). Sosial epidemiologi - et nytt fagfelt med tradisjoner, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kapittel 1.  s 15 - 31
• Næss, Øyvind Erik & Kristensen, Petter (2009). Livsløpet og sosiale ulikheter i helse, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kap.15.  s 286 - 300
• Piro, Fredrik Niclas; Madsen, Christian & Næss, Øyvind Erik (2009). Hvilken rolle spiller bosted for ulikheter i helse?, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kap.7.  s 136 - 150
• Strand, Bjørn Heine & Næss, Øyvind Erik (2009). Folkehelsens sosioøkonomiske fordeling, I: John Gunnar Mæland; Jon Ivar Elstad; Øyvind Erik Næss & Steinar Westin (red.),  Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt.  Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  Kap.3.  s 59 - 78
• Næss, Øyvind; Claussen, Bjørgulf; Smith, GD & Leyland, AH (2008). Life course influence of residential area on cause-specific mortality. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  62, s 29- 34 . doi: 10.1136/jech.2006.048090
• Næss, Øyvind & Schiøtz, Aina (2008). Commentary: Kristian Feyer Andveord's studies on the epidemiology of tuberculosis and the origin of generation cohort analysis. International Journal of Epidemiology.  ISSN 0300-5771.
• Næss, Øyvind; Søgaard, Anne Johanne; Arnesen, Egil; Beckstrøm, Anne Cathrine; Bjertness, Espen; Engeland, Anders; Hjort, Peter F; Holmen, Jostein; Magnus, Per; Njølstad, Inger; Tell, Grethe S.; Vatten, Lars; Vollset, Stein Emil & Aamodt, Geir (2008). Cohort Profile: Cohort of Norway (CONOR). International Journal of Epidemiology.  ISSN 0300-5771.  37, s 481- 485 . doi: 10.1093/ije/dym217 Fulltekst i vitenarkiv.
• Piro, Fredrik Niclas; Madsen, Christian; Næss, Øyvind Erik; Nafstad, Per & Claussen, Bjørgulf (2008). A comparison of self reported air pollution problems and GIS-modeled levels of air pollution in people with and without chronic diseases. Environmental health.  ISSN 1476-069X.  7 . doi: 10.1186/1476-069X-7-9
• Næss, Øyvind Erik; Strand, Bjørn Heine & Smith, George Davey (2007). Childhood and adulthood socioeconomic position across 20 causes of death: a prospective cohort study of 800 000 Norwegian men and women. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  61(11), s 1004- 1009 . doi: 10.1136/jech.2006.052811
• Næss, Øyvind; Claussen, Bjørgulf & Smith, GD (2007). Housing conditions in childhood and cause-specific adult mortality: The effect of sanitary conditions and economic deprivation on 55,761 men in Oslo. Scandinavian Journal of Public Health.  ISSN 1403-4948.  35, s 570- 576 . doi: 10.1080/14034940701320846
• Hem, Camilla; Næss, Øyvind Erik & Strand, Bjørn Heine (2007). Social inequalities in causes of death amenable to health care in Norway. Norsk Epidemiologi.  ISSN 0803-2491.  17(1), s 43- 48 Vis sammendrag

  Objective: Investigate if there are educational inequalities in causes of death considered amenable to health care in Norway and compare this with non-amenable causes. Methods: The study used the concept of “amenable mortality”, which here includes 34 specific causes of death. A linked data file, with information from the Norwegian Causes of Death Registry and the Educational Registry was analyzed. The study population included the whole Norwegian population in two age groups of interest (25-49 and 50-74 years). Information on deaths was from the period 1990-2001. Education was recorded in 1990 and it was grouped in four categories as: basic, lower secondary, higher secondary and higher. In the study men and women were analysed seperately. The analysis was conducted for all amenable causes pooled with and without ischemic heart disease. A Cox proportional hazard regression model was fitted to estimate hazard rate ratios. Results: The study showed educational differences in mortality from causes of death considered amenable to health care, in both age groups and sexes. This was seen both when including and excluding ischemic heart disease. The effect sizes were comparable for amenable and non-amenable causes in both age groups and sexes. Conclusions: This study revealed systematic higher risk of death in lower educational groups in causes of death considered amenable to health care. This indicates potential weaknesses in equitable provision of health care for the Norwegian population. Additional research is needed to identify domains within the health care system of particular concern.

• Næss, Øyvind Erik; Piro, Fredrik N; Nafstad, Per; Smith, George Davey & Leyland, Alastair H (2007). Air pollution, social deprivation and mortality. A multilevel cohort study. Epidemiology.  ISSN 1044-3983.  18(6), s 686- 694 . doi: 10.1097/EDE.0b013e3181567d14
• Næss, Øyvind; Nafstad, Per; Aamodt, Geir; Claussen, Bjørgulf & Rosland, Pål (2007). Relation between concentration of air pollution and cause-specific mortality: Four-year exposures to nitrogen dioxide and particulate matter pollutants in 470 neighborhoods in Oslo, Norway. American Journal of Epidemiology.  ISSN 0002-9262.  165, s 435- 443 . doi: 10.1093/aje/kwk016
• Næss, Øyvind; Piro, Fredrik Niclas; Nafstad, Per; Smith, George Davey & Leyland, Alastair H (2007). Air pollution, social deprivation and mortality. A multilevel cohort study. Epidemiology.  ISSN 1044-3983.  18, s 686- 694
• Piro, Fredrik Niclas; Næss, Øyvind & Claussen, Bjørgulf (2007). Area deprivation and its association with health in a cross-sectional study: are the results biased by recent migration?. International Journal for Equity in Health.  ISSN 1475-9276.  6(10)
• Strand, Bjørn Heine & Næss, Øyvind Erik (2007). Sosial ulikhet i helse : forskning på sosial ulikhet i helse i Norge, I: Ragnhild Rein Bore (red.),  På liv og død : helsestatistikk i 150 år.  Statistisk Sentralbyrå.  ISBN 978-82-537-7293-6.  Del III.  s 74 - 88
• Næss, Øyvind; Hernes, Frank Herman & Blane, David (2006). Life-course influences on mortality in early old age. Social Science and Medicine.  ISSN 0277-9536.  62, s 329- 336
• Piro, Fredrik Niclas; Næss, Øyvind & Claussen, Bjørgulf (2006). Physical activity among elderly people in a city population: the influence of neighbourhood level violence and self perceived safety. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  60, s 626- 632
• Claussen, Bjørgulf; Smits, Jeroen; Næss, Øyvind & Davey, SG (2005). Intragenerational mobility and mortality in Oslo: social selection versus social causation. Social Science and Medicine.  ISSN 0277-9536.  61(12), s 2513- 2520
• Næss, Øyvind; Claussen, Bjørgulf; Thelle, Dag S & Smith, GD (2005). Four indicators of socioeconomic position: relative ranking across causes of death. Scandinavian Journal of Public Health.  ISSN 1403-4948.  33
• Næss, Øyvind; Leyland, Alastair H; Davey, George Smith & Claussen, Bjørgulf (2005). Contextual effect on mortality of neighbourhood level education explained by earlier life deprivation. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  59(12), s 1058- 1059 . doi: 10.1136/jech.2005.036822
• Næss, Øyvind (2004). Individ og gruppenivå i befolknings-undersøkelser og helsetjenesteforskning. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  124, s 2783- 2784
• Næss, Øyvind; Claussen, Bjørgulf & Smith, George Davey (2004). Relative impact of childhood and adulthood socioeconomic conditions on cause specific mortality in men. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  58, s 597- 598
• Næss, Øyvind; Claussen, Bjørgulf; Thelle, Dag S & Smith, George Davey (2004). Cumulative deprivation and cause specific mortality. A census based study of life course influences over three decades. Journal of Epidemiology and Community Health.  ISSN 0143-005X.  58, s 599- 603

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• Mæland, John Gunnar; Elstad, Jon Ivar; Næss, Øyvind Erik & Westin, Steinar (red.) (2009). Sosialepidemiologi - sosiale årsaker til sykdom og helsesvikt. Gyldendal Akademisk.  ISBN 978-82-05-39268-7.  363 s.

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• Næss, Øyvind (2018). Editorial commentary: What drives trends in inequalities of cardiovascular disease?. Trends in cardiovascular medicine.  ISSN 1050-1738. . doi: 10.1016/j.tcm.2018.10.011
• Strand, Bjørn Heine; Steingrímsdóttir, Ólöf Anna; Myklestad, Ingri & Næss, Øyvind (2013). Endringer i ulikheter i dødelighet etter utdanning i Norge – en underlagsrapport om mulige forklaringer. Underlagsrapport til prosjektet Sosial ulikhet i helse: en norsk kunnskapsoversikt, Høgskolen i Oslo og Akershus, 2014..
• Aamodt, Geir; Søgaard, Anne-Johanne; Næss, Øyvind Erik; Beckstrøm, Anne Cathrine & Samuelsen, Sven Ove (2010). CONOR-databasen - et lite stykke Norge. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  130(3), s 264- 265
• Strand, Bjørn Heine; Bævre, Kåre; Dalgard, Odd Steffen; Grøholt, Else-Karin; Næss, Øyvind & Steingrímsdóttir, Ólöf Anna (2010). Sosioøkonomiske helseforskjeller, I: Else-Karin Grøholt; Liv Grøtvedt; Hanna Hånes & Geir Stene-Larsen (red.),  Folkehelserapport 2010 : helsetilstanden i Norge.  Nasjonalt folkehelseinstitutt.  ISBN 978-82-8082-410-3.  Kapittel 9..  s 59 - 62
• Madsen, Christian; Gehring, U; Walker, SE; Brunekreef, B; Stigum, Hein; Næss, Øyvind Erik & Nafstad, Per (2009). Ambient Air Pollution Exposure, Residential Mobility and Term Birth Weight in Oslo, Nonway. Epidemiology.  ISSN 1044-3983.  20(6), s S151- S151
• Næss, Øyvind (2008). Bedre rapportering av epidemiologisk forskning. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  128(6), s 681
• Næss, Øyvind (2008). Commentary: Kristian Feyer Andvord's studies on the epidemiology of tuberculosis and the origin of generation cohort analysis. International Journal of Epidemiology.  ISSN 0300-5771.  37(5), s 923- 932 . doi: 10.1093/ije/dyn107
• Næss, Øyvind (2008). Lærebok i forebygging. Anmeldelse av: Orth-Gomér K Perski A red.Preventiv medicinTeori och praktik. 327 s, tab, ill. Lund: Studentlitteratur, 200. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.
• Næss, Øyvind (2008). Utviklingstrekk i helsesektoren 2008: SKapes helse, skapes velferd-helsesystemets rolle i det norske samfunnet.
• Næss, Øyvind Erik (2008). Bedre rapportering av epidemiologisk forskning. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  128(6), s 681
• Næss, Øyvind Erik & Schiøtz, Aina (2008). Commentary: Kristian Feyer Andvord's studies on the epidemiology of tuberculosis and the origin of generation cohort analysis. International Journal of Epidemiology.  ISSN 0300-5771.  37(5), s 923- 932 . doi: 10.1093/ije/dyn107
• Næss, Øyvind Erik; Rognerud, Marit Aase; Strand, Bjørn Heine; Grøholt, Else-Karin; Graff-Iversen, Sidsel; Arntzen, Anett; Dalgard, Odd Steffen; Eberhard-Gran, Malin M C; Eggesbø, Merete Åse; Johansen, Rune; Kristensen, Petter; Lund, Eiliv; Låg, Marit; Mathiesen, Kristin Schjelderup; Melhus, Marita; Meyer, Haakon E; Nafstad, Per; Slinning, Kari; Søgaard, Anne-Johanne; Torgersen, Leila; Vollrath, Margarete E. & Zahl, Per Henrik (2007). Sosial ulikhet i helse : en faktarapport. rapport Nasjonalt folkehelseinstitutt. 2007:1.
• Berg, Yngvar; Aunet, Snorre; Næss, Øyvind & Mirmotahari, Omid (2004). Basic Multiple-Valued Functions Using Recharge CMOS Logic.

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