[Association between child care environment and childhood early development]

Objective: To investigate the factors related to child care environment and the association between child care environment and children's early development. Methods: Using stratified cluster random sampling, a total of 22 509 children newly enrolled to kindergarten from 187 kindergartens of 16 districts in Shanghai in 2017 were enrolled. A survey was conducted by parent-reported questionnaire. The index of child care environment (ICCE) and the early human capacity index were used to evaluate family child care environment and children's early development respectively. The sample was divided into four groups based on the ICCE score: the lowest family childcare environment (ICCE≤10 scores), lower middle (ICCE=11 scores), upper middle (ICCE=12 scores), and the highest (ICCE=13 scores). The linear regression model and Logistic regression model were used to analyze the factors related to child care environment and the association between child care environment and children's early development respectively. Results: A total of 22 067 children aged (44±7) months, including 11 425 boys (51.8%) and 10 642 girls (48.2%), participated in this study. The multnomial linear regression revealed girls, higher maternal education, higher household annual income, single-child, non-divorced parents, and early breastfeeding experience were protective factors of child care environment for children newly enrolled to kindergarten (β=0.064, 0.238, 0.119, 0.096, 0.113, and 0.032; 95% confidence interval (CI): 0.020-0.108, 0.175-0.302, 0.058-0.180, 0.046-0.146, -0.012-0.242, and -0.051-0.116; all P<0.01). The multinomial Logistic regression revealed compared with the highest child care environment group, the odds ratio of children's early development risks in upper midclle, lower middle, and the lowest child care environment groups were 1.543 (95%CI: 1.373-1.735, P<0.01), 2.537 (95%CI: 2.254-2.856, P<0.01), and 4.198 (95%CI: 3.757-4.690, P<0.01), respectively. Conclusions: The child care environment is not only significantly related to family structure and socioeconomic status, but also to early breastfeeding experience. The child care environment plays an important role in promoting childhood early development.