Factors influencing exclusive breastfeeding rates until 6 months postpartum: the Japan Environment and Children's Study

This research aimed to examine the efficacy of the early initiation of breastfeeding within 1 h of birth, early skin-to-skin contact, and rooming-in for the continuation of exclusive breastfeeding until 6 months postpartum. The research used data from the Japan Environment and Children's Study (JECS), a nationwide government-funded birth cohort study. A total of 80,491 mothers in Japan between January 2011 and March 2014 who succeeded or failed to exclusively breastfeed to 6 months were surveyed in JECS. Multiple logistic regression model was used to analyse the data. The percentage of mothers who succeeded in exclusively breastfeeding to 6 months is 37.4%. Adjusted odds ratios were analysed for all 35 variables. Early initiation of breastfeeding (adjusted odds ratio [AOR]: 1.455 [1.401-1.512]), early skin-to-skin contact (AOR: 1.233 [1.165-1.304]), and rooming-in (AOR: 1.567 [1.454-1.690]) affected continuation of exclusive breastfeeding. Regional social capital (AOR: 1.133 [1.061-1.210]) was also discovered to support the continuation of breastfeeding. In contrast, the most influential inhibiting factors were starting childcare (AOR: 0.126 [0.113-0.141]), smoking during pregnancy (AOR: 0.557 [0.496-0.627]), and obese body type during early pregnancy (AOR: 0.667 [0.627-0.710]).

Automated summary

This research found that early initiation of breastfeeding, early skin-to-skin contact, and rooming-in have a positive impact on the continuation of exclusive breastfeeding until 6 months postpartum, while regional social capital also supports the continuation of breastfeeding. In contrast, starting childcare, smoking during pregnancy, and an obese body type during early pregnancy are inhibiting factors for breastfeeding.