摘要目的:分析婴幼儿口腔健康行为与2年后患龋状况的相关性。方法:本研究为回顾性队列研究，基于北京市口腔公共项目网络数据系统，调取同时在2021年参加0~3岁项目和2023年参加3~6岁氟化泡沫项目的儿童1 663例；2021年样本儿童2岁，由家长回答婴幼儿患龋相关的11个问题，婴幼儿同时有4个及以上的致龋因素，判定患龋风险等级为“危险”，反之判定为“安全”；2023年样本儿童4岁，由口腔医生进行患龋状况检查；比较儿童2岁时不同患龋风险等级与4岁时患龋状况的相关性。结果:经常含奶入睡，晚上喝夜奶，进食后很少漱口或喝水的婴幼儿，2年后的患龋率和龋失补牙数较高（均 P<0.05）。父母不是每天给刷牙，没有用过牙线，每天进食糖果或点心等甜食2次及以上的婴幼儿，2年后的患龋率和龋失补牙数都较高（均 P<0.001）。1 174例（70.6%）2岁儿童的患龋风险等级为“危险”，489例（29.6%）2岁儿童的患龋风险等级为“安全”，2年后“危险”组的患龋率高于“安全”组（52.7%比41.5%， χ2=17.36， P<0.001），“危险”组的龋均高于“安全”组［1（0，4）比0（0，2）， H=-4.789， P<0.001］。 结论:婴幼儿口腔健康行为与2年后的患龋密切相关，基于问卷的龋风险评估具有可行性。

abstractsObjective:To analyze the correlation between oral health behaviors and the incidence of dental caries two years later in infants and toddlers.Methods:It was a retrospective cohort study. Based on the Beijing Stomatological Public Project Network data system, 1 663 children were recruited to participate in 0-3 years project in 2021 and 3-6 years fluoridated foam project in 2023. In 2021, the children were 2 years old, the parents answered 11 questions related to dental caries in the children. The children with four or more caries-inducing factors were classified as having a "high risk" of developing dental caries, otherwise, they were classified as "low risk". In 2023, the children were 4 years old, and their caries status was checked by the dentists. The correlation between different caries risk levels at the age of 2 and caries status at the age of 4 in the children was compared.Results:Infants who often fell asleep with milk, drank night milk at night, and rarely gargle or drink water after eating had a relatively high caries rate and caries after 2 years, and the difference was statistically significant (all, P<0.05). Infants whose parents did not brush their teeth every day, did not floss, and ate sweets or snacks twice or more a day had a relatively high caries rate and caries after 2 years, and the difference was statistically significant (all, P<0.001). The caries risk of 1 174 (70.6%) 2-year-old children was rated as "dangerous", and that of 489 (29.6%) 2-year-old children was rated as "safe". After 2 years, the incidence of dental caries in "dangerous" group was higher than that in the "safe" group (52.7% vs 41.5%, χ2=17.36, P<0.001), and the DMFT index in "dangerous" group was also higher than that in the "safe" group (1(0, 4)比0(0, 2), H=-4.789, P<0.001). Conclusions:Oral health behavior is closely related to the incidence of dental caries caries 2 years later in infants and toddlers, and questionnaire-based caries risk assessment is feasible.