Autoimmune diseases have been little studied in gay men and lesbians. We followed 4.4 million Danes, including 9,615 same-sex married (SSM) persons, for 47 autoimmune diseases in the National Patient Registry between 1989 and 2008. Poisson regression analyses provided first hospitalization rate ratios (RRs) comparing rates between SSM individuals and persons in other marital status categories. SSM individuals experienced no unusual overall risk of autoimmune diseases. However, the risk of autoimmune thyroid dysfunction was increased, notably Hashimoto’s thyroiditis (womenSSM, RR = 2.92; 95 % confidence interval (CI) 1.74–4.55) and Graves’ disease (menSSM, RR = 1.88; 95 % CI 1.08–3.01). There was also an excess of primary biliary cirrhosis (womenSSM, RR = 4.09; 95 % CI 1.01–10.7), and of psoriasis (menSSM, RR = 2.48; 95 % CI 1.77–3.36), rheumatic fever (menSSM, RR = 7.55; 95 % CI 1.87–19.8), myasthenia gravis (menSSM, RR = 5.51; 95 % CI 1.36–14.4), localized scleroderma (menSSM, RR = 7.16; 95 % CI 1.18–22.6) and pemphigoid (menSSM, RR = 6.56; 95 % CI 1.08–20.6), while Dupuytren’s contracture was reduced (menSSM, RR = 0.64; 95 % CI 0.39–0.99). The excess of psoriasis was restricted to same-sex married men with HIV/AIDS (menSSM, RR = 10.5; 95 % CI 6.44–15.9), whereas Graves’ disease occurred in excess only among same-sex married men without HIV/AIDS (menSSM, RR = 1.99; 95 % CI 1.12–3.22). Lesbians and immunologically competent gay men in same-sex marriage face no unusual overall risk of autoimmune diseases. However, the observed increased risk of thyroid dysfunction in these lesbians and gay men deserves further study.
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No financial support was obtained for this study.
Conflict of interest
All authors declare that they have no conflicts of interest.
Institute of Medicine (IOM). Committee on Lesbian, Gay, Bisexual, and Transgender Health Issues and Research Gaps and Opportunities. The health of lesbian, gay, bisexual, and transgender people—building a foundation for better understanding. 1–367. 2011. http://www.nap.edu/catalog.php?record_id=13128. Accessed 15 Nov 2013.
Sell RL, Becker JB. Sexual orientation data collection and progress toward Healthy People 2010. Am J Public Health. 2001;91(6):876–82.PubMedCrossRefGoogle Scholar
Case P, Austin SB, Hunter DJ, et al. Sexual orientation, health risk factors, and physical functioning in the Nurses’ Health Study II. J Womens Health (Larchmt). 2004;13(9):1033–47.CrossRefGoogle Scholar
Frisch M, Smith E, Grulich A, et al. Cancer in a population-based cohort of men and women in registered homosexual partnerships. Am J Epidemiol. 2003;157(11):966–72.PubMedCrossRefGoogle Scholar
Mathy RM, Cochran SD, Olsen J, et al. The association between relationship markers of sexual orientation and suicide: Denmark, 1990-2001. Soc Psychiatry Psychiatr Epidemiol. 2011;46(2):111–7.PubMedCentralPubMedCrossRefGoogle Scholar
Conron KJ, Mimiaga MJ, Landers SJ. A population-based study of sexual orientation identity and gender differences in adult health. Am J Public Health. 2010;100(10):1953–60.PubMedCrossRefGoogle Scholar
Frisch M, Brønnum-Hansen H. Mortality among men and women in same-sex marriage: a national cohort study of 8333 Danes. Am J Public Health. 2009;99(1):133–7.PubMedCrossRefGoogle Scholar
Frisell T, Lichtenstein P, Rahman Q, et al. Psychiatric morbidity associated with same-sex sexual behaviour: influence of minority stress and familial factors. Psychol Med. 2010;40(2):315–24.PubMedCrossRefGoogle Scholar
Russell ST, Joyner K. Adolescent sexual orientation and suicide risk: evidence from a national study. Am J Public Health. 2001;91(8):1276–81.PubMedCrossRefGoogle Scholar
Boehmer U, Bowen DJ, Bauer GR. Overweight and obesity in sexual-minority women: evidence from population-based data. Am J Public Health. 2007;97(6):1134–40.PubMedCrossRefGoogle Scholar
Frisch M, Biggar RJ, Engels EA, et al. Association of cancer with AIDS-related immunosuppression in adults. J Am Med Assoc. 2001;285(13):1736–45.CrossRefGoogle Scholar
Frisch M, Glimelius B, van den Brule AJ, et al. Sexually transmitted infection as a cause of anal cancer. N Engl J Med. 1997;337(19):1350–8.PubMedCrossRefGoogle Scholar
Lynge E, Sandegaard JL, Rebolj M. The Danish National Patient Register. Scand J Public Health. 2011;39(7 Suppl):30–3.PubMedCrossRefGoogle Scholar
Pedersen M, Klarlund M, Jacobsen S, et al. Validity of rheumatoid arthritis diagnoses in the Danish National Patient Registry. Eur J Epidemiol. 2004;19(12):1097–103.PubMedCrossRefGoogle Scholar
Nielsen NM, Frisch M, Rostgaard K, et al. Autoimmune diseases in patients with multiple sclerosis and their first-degree relatives: a nationwide cohort study in Denmark. Mult Scler. 2008;14(6):823–9.PubMedCrossRefGoogle Scholar
Nielsen NM, Jørgensen KT, Pedersen BV, et al. The co-occurrence of endometriosis with multiple sclerosis, systemic lupus erythematosus and Sjogren syndrome. Hum Reprod. 2011;26(6):1555–9.PubMedCrossRefGoogle Scholar
Jørgensen KT, Pedersen BV, Nielsen NM, et al. Childbirths and risk of female predominant and other autoimmune diseases in a population-based Danish cohort. J Autoimmunity. 2012;38(2–3):J81–7.CrossRefGoogle Scholar
Bager P, Simonsen J, Nielsen NM, et al. Cesarean section and offspring’s risk of inflammatory bowel disease: a national cohort study. Inflamm Bowel Dis. 2012;18(5):857–62.PubMedCrossRefGoogle Scholar
Bache I, Nielsen NM, Rostgaard K, et al. Autoimmune diseases in a Danish cohort of 4,866 carriers of constitutional structural chromosomal rearrangements. Arthritis Rheum. 2007;56(7):2402–9.PubMedCrossRefGoogle Scholar
Jørgensen KT, Rostgaard K, Bache I, et al. Autoimmune diseases in women with Turner’s syndrome. Arthritis Rheum. 2010;62(3):658–66.PubMedCrossRefGoogle Scholar
Jørgensen KT, Nielsen NM, Pedersen BV, et al. Hyperemesis, gestational hypertensive disorders, pregnancy losses and risk of autoimmune diseases in a Danish population-based cohort. J Autoimmun. 2012;38(2–3): J120–J128.Google Scholar
Lipsky PE, Diamond B. Autoimmunity and autoimmune diseases. In: Braunwald E, Fauci AS, Kasper DL, et al., editors. Harrison’s principles of internal medicine. New York, NY: MacGraw-Hill; 2001. p. 1839–43.Google Scholar
Haynes BF, Fauci AS. Introduction to the immune system. In: Fauci AS, Braunwald E, Isselbacher KJ, Wilson JD, et al., editors. Harrison’s principles of internal medicine. New York, NY: McGraw-Hill; 1998. p. 1753–76.Google Scholar
Baird KS, Alwan WH, Crossan JF, et al. T-cell-mediated response in Dupuytren’s disease. Lancet. 1993;341(8861):1622–3.PubMedCrossRefGoogle Scholar
Staines DR. Are multiple sclerosis and amyotrophic lateral sclerosis autoimmune disorders of endogenous vasoactive neuropeptides? Med Hypotheses. 2008;70(2):413–8.PubMedCrossRefGoogle Scholar
Ralph DJ, Mirakian R, Pryor JP, et al. The immunological features of Peyronie’s disease. J Urol. 1996;155(1):159–62.PubMedCrossRefGoogle Scholar
Baadsgaard M, Quitzau J. Danish registers on personal income and transfer payments. Scand J Public Health. 2011;39(7 Suppl):103–5.PubMedCrossRefGoogle Scholar
Harrell FE Jr. Regression modeling strategies: with applications to linear models, logistic regression, and survival analysis. New York, NY: Springer; 2001.CrossRefGoogle Scholar
Carle A, Pedersen IB, Knudsen N, et al. Moderate alcohol consumption may protect against overt autoimmune hypothyroidism: a population-based case-control study. Eur J Endocrinol. 2012;167(4):483–90.PubMedCrossRefGoogle Scholar
Carle A, Pedersen IB, Knudsen N, et al. Graves’ hyperthyroidism and moderate alcohol consumption: evidence for disease prevention. Clin Endocrinol (Oxf). doi:10.1111/cen.12106.
Gransell L, Larsen H. Lige og ulige? Homoseksuelle, biseksuelle og transkønnedes levevilkår [Survey report about living conditions among Danish LGBT individuals] (in Danish). Copenhagen, CASA; 1–128. 2009 http://www.dkr.dk/sites/default/files/lige_og_ulige.pdf. Accessed 15 Nov 2013.
Corpechot C, Chretien Y, Chazouilleres O, et al. Demographic, lifestyle, medical and familial factors associated with primary biliary cirrhosis. J Hepatol. 2010;53(1):162–9.PubMedCrossRefGoogle Scholar
Smyk DS, Rigopoulou EI, Muratori L, et al. Smoking as a risk factor for autoimmune liver disease: what we can learn from primary biliary cirrhosis. Ann Hepatol. 2012;11(1):7–14.PubMedGoogle Scholar
Hyde Z, Comfort J, McManus A, et al. Alcohol, tobacco and illicit drug use amongst same-sex attracted women: results from the Western Australian Lesbian and Bisexual Women’s Health and Well-Being Survey. BMC Public Health. 2009;9:317.PubMedCentralPubMedCrossRefGoogle Scholar
Zaritsky E, Dibble SL. Risk factors for reproductive and breast cancers among older lesbians. J Womens Health (Larchmt). 2010;19(1):125–31.CrossRefGoogle Scholar
Descatha A, Jauffret P, Chastang JF, et al. Should we consider Dupuytren’s contracture as work-related? A review and meta-analysis of an old debate. BMC Musculoskelet Disord. 2011;12:96.PubMedCentralPubMedCrossRefGoogle Scholar
Egan P, Edelman MS, Sherrill K. Findings from the Hunter College poll of lesbians, gays and bisexuals: new discoveries about identity, political attitudes, and civic engagement. New York, NY: City University of New York; 2008. p. 1–32.Google Scholar
Rothblum ED, Balsam KF, Solomon SE, et al. Lesbian, gay male, bisexual, and heterosexual siblings discrepancies in income and education in three US samples. In: Badgett L, Frank J, editors. Sexual orientation discrimination: an international perspective. New York, NY: Routledge; 2007. p. 62–75.Google Scholar
Weetman A. Immune reconstitution syndrome and the thyroid. Best Pract Res Clin Endocrinol Metab. 2009;23(6):693–702.PubMedCrossRefGoogle Scholar
Gilquin J, Viard JP, Jubault V, et al. Delayed occurrence of Graves’ disease after immune restoration with HAART. Highly active antiretroviral therapy. Lancet. 1998;352(9144):1907–8.PubMedCrossRefGoogle Scholar
Obel N, Reinholdt H, Omland LH, et al. Retrivability in The Danish National Hospital Registry of HIV and hepatitis B and C coinfection diagnoses of patients managed in HIV centers 1995–2004. BMC Med Res Methodol. 2008;8:25.PubMedCentralPubMedCrossRefGoogle Scholar
Blanchard R, Bogaert AF. Biodemographic comparisons of homosexual and heterosexual men in the Kinsey Interview Data. Arch Sex Behav. 1996;25(6):551–79.PubMedCrossRefGoogle Scholar
Blanchard R, Dickey R, Jones CL. Comparison of height and weight in homosexual versus nonhomosexual male gender dysphorics. Arch Sex Behav. 1995;24(5):543–54.PubMedCrossRefGoogle Scholar
Frisch M, Zdravkovic S. Body size at birth and same-sex marriage in young adulthood. Arch Sex Behav. 2010;39(1):117–23.PubMedCrossRefGoogle Scholar
Engsig FN, Hansen AB, Gerstoft J, et al. Inpatient admissions and outpatient visits in persons with and without HIV infection in Denmark, 1995–2007. AIDS. 2010;24(3):457–61.PubMedCrossRefGoogle Scholar
Morar N, Willis-Owen SA, Maurer T, et al. HIV-associated psoriasis: pathogenesis, clinical features, and management. Lancet Infect Dis. 2010;10(7):470–8.PubMedCrossRefGoogle Scholar
Nielsen GL, Sørensen HT, Pedersen AB, et al. Analyses of data quality in registries concerning diabetes mellitus—a comparison between a population based hospital discharge and an insulin prescription registry. J Med Syst. 1996;20(1):1–10.Google Scholar
Fonager K, Sørensen HT, Rasmussen SN, et al. Assessment of the diagnoses of Crohn’s disease and ulcerative colitis in a Danish hospital information system. Scand J Gastroenterol. 1996;31(2):154–9.PubMedCrossRefGoogle Scholar
Mason K, Thygesen LC, Stenager E, et al. Evaluating the use and limitations of the Danish National Patient Register in register-based research using an example of multiple sclerosis. Acta Neurol Scand. 2012;125(3):213–7.PubMedCrossRefGoogle Scholar
Frisch M, Simonsen J. Marriage, cohabitation and mortality in Denmark: national cohort study of 6.5 million persons followed for up to three decades (1982–2011). Int J Epidemiol. 2013;42(2):559–78.PubMedCrossRefGoogle Scholar