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Is sibling rivalry fatal?: siblings and mortality clustering
The Journal of Interdisciplinary History
|April 26, 2012
Summary
Sibling competition for household resources significantly increased early childhood mortality in 19th-century Belgium. This childhood mortality risk was also found to cluster within families, highlighting the need for nuanced demographic analysis.
Area of Science:
- Demographic History
- Childhood Mortality Studies
- Population Health
Background:
- Historical population registers provide valuable data for understanding past health trends.
- Nineteenth-century European households often experienced resource scarcity, impacting child survival.
Observation:
- Analysis of Belgian population data reveals a link between sibling age proximity and child mortality.
- Children under five faced higher death probabilities when sharing a household with similarly aged siblings.
Findings:
- Sibling competition for resources elevates mortality risk for children under five, independent of birth spacing or multiple births.
- Childhood mortality exhibited a clustering pattern within certain Belgian families during this era.
- Mortality risk is influenced by the presence of siblings as a time-varying factor.
Implications:
- Future demographic research should segment childhood mortality by sibling age groups.
- Incorporating sibling presence as a time-varying covariate enhances mortality analyses.
- Accounting for mortality clustering within families is crucial for accurate historical health assessments.
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