Report on random survey for the epidemiology of dental caries among the urban and rural citizens in Chongqing / 重庆医科大学学报

ABSTRACT

Objective:To know the prevalence of dental caries among the urban and rural citizens in Chongqing to provide evidence for effective programs in preventing dental caries.Methods:Based on The Guideline for the Third National Oral Health Survey,with nonproportional stratified cluster sampling method,3168 citizens from six districts and counties underwent oral examination.Together there were 4 age groups,5,12,35~44 and 65~74 year-old.For each group,male and female were of the same number,and the rural and the urban were also of the same number.A total sample of 2942 was effective.Results: the prevalence rates of dental caries for 5,12,35~44,65~74-year-old groups were 64.34%、23.83%、56.71% and 79.78% respectively,and the mean DMFT(dmft) were 3.57、0.49、1.58 and 5.00 respectively.Both the prevalence rate and the mean DMFT(dmft) of female were higher than those of male except 5-year-old group(P