Objective To understand the timing for first introducing complementary food to infants in monitoring sites of four provinces in China,and to analyze the factors that influence the timing of complementary food introduction. Methods A total of 2 367 infants from five monitoring sites in four provinces were selected from the maternal and child health monitoring project conducted by National Center for Women and Children’s Health,China CDC from September 2015 to June 2019.The chi-square test was used to analyze the distribution characteristics of first introducing time of complementary food (≤4,5,6,7,≥8 months),and binary logistic regression analysis was used to analyze the influencing factors. Results The percentage of first introducing time of complementary food (≤4,5,6,7,≥8 months) in infants in monitoring sites were 16.35%,50.61%,23.91%,5.83% and 3.30%,respectively.The logistic regression analysis results showed that compared to infants who were breastfed for less than 6 months and whose mothers planned to start complementary foods before 6 months of age,infants who were breastfed for 6 months or more and whose mothers planned to start complementary foods after 6 months of age were less likely to start complementary foods early (OR=0.407,95%CI: 0.307-0.539;OR=0.625,95%CI:0.496-0.787).Compared to infants delivered vaginally/naturally,infants delivered by cesarean section were more likely to start complementary foods early (OR=1.269,95%CI:1.012-1.592). Conclusion The duration of breastfeeding,mode of delivery,and maternal intention to start complementary foods independently influence the timing of complementary food introduction in infants.Targeted promotion and education on complementary food addition should be strengthened in key areas to promote timely and scientifically reasonable infant feeding Study.
Key words
Infants /
Complementary feeding /
Influencing factors /
Cohort study
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