中文摘要：

目的探讨中老年人患龋的易感因素。方法采用分层整群抽样对某高校社区的436例中老年人进行流行病学问卷调查、口腔检查和空腹血糖、血脂、静态唾液流量、唾液pH值测定,最后有434例符合条件者纳入统计分析,用SPSS 11.5统计软件的非条件Lo-gistic回归法分析患龋与性别、年龄、空腹血糖、血脂、静态唾液流量、唾液pH值等14项因素的关系。结果 434例受试者是否患龋的Logistic回归分析结果显示：患龋与性别成正相关关系（OR=1.588,P=0.046）,女性患龋率高于男性;与吸烟（OR=0.594,P=0.002）和唾液pH值（OR=0.665,P=0.047）成负相关关系。结论龋病的发生受多种因素的影响,必须采取综合性的预防措施才能有效地控制患龋率。

英文摘要：

Objective It is to approach the caries predisposing factors in middle-aged and elderly population. Methods By using stratified cluster sampling, the epidemiology survey,oral examination was carried out and fasting plasma glucose （FBG） levels, blod lipids, resting salivary flow, salivary pH value were tested in 436 cases of middle-aged and the elderly in the com- munity of a certain university. Finally, there were 434 cases of qualified individuals into statistical analysis. The relationships of caries with gender, age, FBG, blood lipid, the volume of saliva, salivary pH were analyzed with the statistical software of SPSS 11.5 non-conditional Logistic regression method. Results Logistic regression for the risk factors of caries showed ： caries were positive correlated with gender （ OR = 1. 588, P =0. 046）, the caries rate of female was higher than that of male; caries were negative correlated with smoking status （ OR = 0. 594, P = 0. 002） and salivary pH （ OR = 0. 665, P = 0. 047 ）. Conclu- sion The caries rate is influenced by multiple factors; the comprehensive measure must be carried out to effectively control the caries rate.