Journal
BRITISH JOURNAL OF PSYCHIATRY
Volume 200, Issue 5, Pages 374-380Publisher
ROYAL COLLEGE OF PSYCHIATRISTS
DOI: 10.1192/bjp.bp.111.092098
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Funding
- National Health Research Institutes [PH-099-PP-56, PH-100-PP-14]
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Background The association between autoimmune diseases and schizophrenia has rarely been systematically investigated. Aims To investigate the association between schizophrenia and a variety of autoimmune diseases and to explore possible gender variation in any such association. Method Taiwan's National Health Insurance Research Database was used to identify 10811 hospital in-patients with schizophrenia and 108110 age-matched controls. Univariate and multiple logistic regression analyses were performed, separately, to evaluate the association between autoimmune diseases and schizophrenia. We applied the false discovery rate to correct for multiple testing. Results When compared with the control group, the in-patients with schizophrenia had an increased risk of Graves' disease (odds ratio (OR) = 1.32, 95% CI 1.04-1.67), psoriasis (OR = 1.48, 95% CI 1.07-2.04), pernicious anaemia (OR = 1.71, 95% CI 1.04-2.80), celiac disease (OR=2.43, 95% CI 1.12-5.27) and hypersensitivity vasculitis (OR = 5.00, 95% CI 1.64-15.26), whereas a reverse association with rheumatoid arthritis (OR=0.52, 95% CI 0.35-0.76) was also observed. Gender-specific variation was found for Sjogren syndrome, hereditary haemolytic anaemia, myasthenia gravis, polymyalgia rheumatica and dermatomyositis. Conclusions Schizophrenia was associated with a greater variety of autoimmune diseases than was anticipated. Further investigation is needed to gain a better understanding of the aetiology of schizophrenia and autoimmune diseases.
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