Affiliation:
1. Department of Epidemiology, School of Public Health University of Michigan Ann Arbor Michigan USA
2. Division of Clinical Epidemiology, Department of Medicine (Solna) Karolinska Institutet Stockholm Sweden
3. Department of Epidemiology, Mailman School of Public Health Columbia University, and New York State Psychiatric Institute New York New York USA
Abstract
AbstractObjectivesTo investigate associations of neonatal characteristics and pregnancy complications with bipolar disorder (BPD) in offspring.MethodsWe conducted a nationwide cohort study among 2,059,578 non‐malformed singleton live‐births in Sweden born 1983–2004. Using national registries with prospectively recorded information, we followed participants for a BPD diagnosis from 13 up to 34 years of age. We compared BPD risks between exposure categories using hazard ratios (HR) with 95% confidence intervals (CI) from adjusted Cox models. We also conducted sibling‐controlled analyses among 1,467,819 full siblings.ResultsThere were 14,998 BPD diagnoses. Risk of BPD was 0.74% through 25 years of age. Very/extremely preterm birth (22 to 31 weeks) was related to increased BPD HRs in sibling‐controlled analyses; compared with a gestational age of 37 weeks, adjusted HR (95% CI) for 31, 28, and 22 weeks were, respectively, 1.31 (0.99, 1.74), 2.09 (1.15, 3.79), and 5.74 (1.15, 28.63). Spontaneous but not medically indicated very/extremely preterm birth was associated with increased risk. Compared with vaginal birth, caesarean section birth was associated with 1.20 (1.08, 1.33) and 1.58 (1.06, 2.36) times higher BPD risk in general and sibling cohorts, respectively. Small‐for‐gestational age (SGA) birth was related to increased BPD HRs in general cohort and sibling analyses (HRs [95% CI] were 1.22 [1.06, 1.39] and 1.68 [1.13, 2.50], respectively); only term SGA was associated with increased risk. Head circumference‐for‐gestational age, gestational diabetes, preeclampsia, and placental abruption were not associated with BPD.ConclusionsVery/extremely preterm birth, caesarean birth, and SGA are related to BPD incidence.
Funder
National Institute of Mental Health
Subject
Biological Psychiatry,Psychiatry and Mental health
Cited by
1 articles.
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