Rana H. Mosli|Alison L. Miller|K. E. Peterson|Niko Kaciroti|Katherine L. Rosenblum|Ana Baylín|Julie C. Lumeng
Birth order and sibship composition as predictors of overweight or obesity among low?income 4? to 8?year?old children
University of Michigan–Ann Arbor|King Abdulaziz University|University of Michigan–Ann Arbor|University of Michigan–Ann Arbor|Harvard University|University of Michigan–Ann Arbor|University of Michigan–Ann Arbor|University of Michigan–Ann Arbor|University of Michigan–Ann Arbor
summary objective study aimed examine association birth order number sex siblings overweight obesity among 4 8yearolds methods crosssectional study involving 273 lowincome motherchild dyads questionnaires anthropometry completed multiple logistic regression used examine association birth order younger siblings older siblings least one brother least one sister odds overweight obesity analyses repeated additionally include nonbiological siblings models adjusted potential confounders intermediate variables results prevalence child overweight obesity 425 adjusting covariates children youngest siblings higher odds overweight obesity compared oldest siblings odds ratio 418 95 confidence interval ci 167 1046 321 95 ci 141 733 respectively one younger siblings least one brother associated lower odds 038 95 ci 021 069 047 95 ci 028 081 respectively including nonbiological siblings meaningfully change associations conclusion birth order sibship composition associated overweight obesity among 4 8yearolds future studies identifying underlying behavioural mechanism help inform familybased intervention programmes