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Interpregnancy interval and the risk of oppositional defiant disorder in offspring
Development and Psychopathology  (IF4.151),  Pub Date : 2022-03-02, DOI: 10.1017/s095457942200013x
Berihun Assefa Dachew, Gavin Pereira, Gizachew Assefa Tessema, Gursimran Kaur Dhamrait, Rosa Alati

The study aimed to investigate the association between interpregnancy interval (IPI) and parent-reported oppositional defiant disorder (ODD) in offspring at 7 and 10 years of age. We used data from the Avon Longitudinal Study of Parents and Children (ALSPAC), an ongoing population-based longitudinal study based in Bristol, United Kingdom (UK). Data included in the analysis consisted of more than 3200 mothers and their singleton children. The association between IPI and ODD was determined using a series of log-binomial regression analyses. We found that children of mothers with short IPI (<6 months) were 2.4 times as likely to have a diagnosis of ODD at 7 and 10 years compared to mothers with IPI of 18–23 months (RR = 2.45; 95%CI: 1.24–4.81 and RR = 2.40; 95% CI: 1.08–5.33), respectively. We found no evidence of associations between other IPI categories and risk of ODD in offspring in both age groups. Adjustment for a wide range of confounders, including maternal mental health, and comorbid ADHD did not alter the findings. This study suggests that the risk of ODD is higher among children born following short IPI (<6 months). Future large prospective studies are needed to elucidate the mechanisms explaining this association.