a significant trendP <0.001
Compared to singletons, individuals with five or more siblings had an increased risk of stomach (RR=1.48), lung (RR=1.13) and cervical (RR=1.19) cancers, each with a significant trend in risk ( P <0.001).
Compared to singletons, individuals with five or more siblings had an increased risk of stomach (RR=1.48), lung (RR=1.13) and cervical (RR=1.19) cancers, each with a significant trend in risk ( P <0.001).