Premarital sex and its association with child marriage among ever-married women: a study of national representative survey

Background Sexual engagement before marriage (premarital sex) can influence child marriage; however, the evidence is scarce in low- and middle-income countries (LMICs), including Bangladesh. This study aimed to explore the association between premarital sex and child marriage among ever-married women aged 15-24 years. Methods We analysed data of ever-married women aged 15-24 years after extracting from the 2017/18 Bangladesh Demographic Health Survey (BDHS). Premarital sex (yes, no) was the primary exposure in this study, and child marriage was the outcome variable. Multilevel mixed-effect logistic regression models were used to determine the extent to which premarital sex influences the occurrence of child marriage. Results The prevalence of premarital sex and child marriage was 27% and 76.6%, respectively. Ever-married women who experienced child marriage had higher odds of reporting that they had engaged in premarital sex (aOR: 2.68; 95% CI: 2.20-3.26). The odds of premarital sex for women who experienced child marriage were higher in both urban (aOR: 2.67; 95% CI: 1.88-3.80) and rural areas (aOR: 2.69; 95% CI: 2.11-3.43). Child marriage was more common among women of relatively poor households who had premarital sex than those from other wealth quintiles. Conclusion Premarital sex significantly impacts girls’ child marriage in Bangladesh, and it varies greatly depending on the household’s socioeconomic status. Expanding existing school and community-based programmes aimed at reducing girls’ child marriage, abstinence from early premarital-sexual intercourse and context-specific multi-component interventions for at-risk young people may reduce these practices.