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Chinese Journal of Dental Research
Chin J Dent Res 21 (2018), No. 3     15. Oct. 2018
Chin J Dent Res 21 (2018), No. 3  (15.10.2018)

Page 167-179, doi:10.3290/j.cjdr.a41076

Dental Caries Status and its Associated Factors among 3- to 5-year-old Children in China: A National Survey
DU, Min Quan / LI, Zhen / JIANG, Han / WANG, Xing / FENG, Xi Ping / HU, De Yu / LIN, Huan Cai / WANG, Bo / SI, Yan / WANG, Chun Xiao / ZHENG, Shu Guo / LIU, Xue Nan / RONG, Wen Sheng / WANG, Wei Jian / TAI, Bao Jun
Objective: To investigate the prevalence and severity of dental caries among pre-school children in China as part of the 4th National Oral Health Survey.
Methods: The sampling process was conducted with a multistage stratified cluster method. A total of 40,360 children aged between 3 and 5 years were recruited for this study. Each participant was clinically assessed according to the 5th edition of the oral health survey's basic methods recommended by the World Health Organization (WHO) and their parents or grandparents completed a questionnaire at a face-to-face interview. The status of dental caries was shown in the form of the mean dmft and the prevalence of dental caries. The logistic regression analysis was performed to study the relationships between the prevalence of dental caries and the selected variables.
Results: The prevalence of dental caries was 50.8%, 63.6% and 71.9% for 3-, 4- and 5-year-olds, respectively. The mean dmft was 2.28, 3.40 and 4.24, respectively. Logistic regression analysis showed that children who were mixed-fed had a higher chance of staying free of dental caries; children who had dessert before going to bed were associated with a higher probability of caries.
Conclusion: The status of dental caries among preschool children in China is on the increase. The preschoolers' dental caries status related to their breastfeeding conditions within the first 6 months of life and their snacking habits.

Keywords: China, dental caries, preschool children, epidemiology, the 4th National Oral Health Survey
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