“…It has been shown that the family SES is closely related to the occurrence of caries 18 . In this study, we found that family income was not associated with the incidence of caries, whereas low education and less oral knowledge of parents, more number of children in the family, and rural residence were significantly related to the occurrence of caries, which is consistent with other studies 19,20 . In addition, we also found that the incidence of caries was significantly higher in private childcare providers than in public ones.…”