Invited Commentary: Birth Order and Suicide in a Broader Context
Open Access
- 10 March 2013
- journal article
- comment
- Published by Oxford University Press (OUP) in American Journal of Epidemiology
- Vol. 177 (7), 645-648
- https://doi.org/10.1093/aje/kwt015
Abstract
In this issue of the Journal, Bjørngaard et al. give us new insights into the etiology of mental health by studying birth order and suicide risk (Am J Epidemiol. 2013;177(7):638–644). Although the authors provided empirical evidence that each increase in birth order (i.e., from first-born to second-born, second-born to third-born, etc.) is associated with a 46% higher suicide risk, they gave us very little information on the likely explanations. In our commentary, we draw attention to the possible mechanisms underlying a causal relationship between birth order and suicide. Given that Norway is one of the richest countries in the world, the findings of Bjørngaard et al. in a Norwegian cohort also call for a discussion of whether their results are representative of other societies that are similar or dissimilar with respect to economic institutions, social conditions, and political environment. We suggest that there are several plausible mechanisms to explain higher suicide rates among later-born children, but other mechanisms might also operate in the opposite direction, that is, have beneficial outcomes among later-born children. Specifically, there are reasons to expect a different relationship between birth order and psychiatric outcomes in poorer societal contexts.Keywords
This publication has 20 references indexed in Scilit:
- Maternal Age at Child Birth, Birth Order, and Suicide at a Young Age: A Sibling ComparisonAmerican Journal of Epidemiology, 2013
- Fetal growth, early life circumstances, and risk of suicide in late adulthoodEuropean Journal of Epidemiology, 2011
- Suicide in young Norwegians in a life course perspective: population-based cohort studyJournal of Epidemiology and Community Health, 2009
- Explaining the Relation Between Birth Order and IntelligenceScience, 2007
- The origins of the developmental origins theoryJournal of Internal Medicine, 2007
- From the Cradle to the Labor Market? The Effect of Birth Weight on Adult OutcomesThe Quarterly Journal of Economics, 2007
- Perinatal circumstances and risk of offspring suicideThe British Journal of Psychiatry, 2006
- Restricted fetal growth and adverse maternal psychosocial and socioeconomic conditions as risk factors for suicidal behaviour of offspring: a cohort studyThe Lancet, 2004
- Birth order and mortality: a life-long follow-up of 14,200 boys and girls born in early 20th century SwedenSocial Science & Medicine (1982), 2002
- Schizophrenia as a Long-Term Outcome of Pregnancy, Delivery, and Perinatal Complications: A 28-Year Follow-Up of the 1966 North Finland General Population Birth CohortAmerican Journal of Psychiatry, 1998