摘要目的 调查北京地区≥50岁男性性功能障碍的患病情况及相关危险因素. 方法 采用分层多阶段整群不等比例随机抽样方法,选择截止到2008年6月1日北京地区15个社区常驻人口中1644例≥50岁男性作为研究对象,记录国际勃起功能问卷(IIEF-5)评分、男性性功能问卷( O'Leary 1995)、IPSS、体质量指数(body mas index,BMI)、前列腺体积,询问既往糖尿病、高血压、高血脂、心脑血管病等史,吸烟和饮酒情况.应用x2检验和Logistic回归法分析与性功能障碍相关的危险因素. 结果 本组勃起功能障碍(ED)、性欲低下和射精障碍的总患病率分别为90.45％、60.04％、38.81％.50 ～59岁、60 ～ 69岁、70 ～ 79岁和≥80岁年龄组间ED、性欲低下和射精障碍的患病率差异有统计学意义(P＜0.05)；多因素分析结果显示年龄与ED(β =0.12,P＜0.05)、性欲低下(β=0.10,P＜0.05)和射精障碍(β=0.08,P＜0.05)相关,BMI与ED相关(β=0.07,P＜0.05),高血压病、前列腺体积是性欲低下(β =0.37,0.08,P＜0.05)和射精障碍(β=0.47,0.06,P＜0.05)的危险因素；饮酒与射精障碍有关(β=-0.31,P＜0.05). 结论 北京地区≥50岁男性ED、性欲低下患病率增加,射精障碍患病率降低,说明中老年男性可以有良好的射精功能,多种因素导致不能达到良好的勃起是影响性生活的主要原因.ED、性欲低下和射精障碍的患病率随年龄增加而增加,年龄是三者共同的危险因素.BMI是ED的危险因素,高血压病、前列腺体积是性欲低下和射精障碍的危险因素；饮酒与射精障碍有关.

abstractsObjective To investigate the prevalence of sexual dysfunction in aged men and associated risk factors in Beijing. Methods A cross-sectional study was performed in communities of Beijing involved 1656 men aged over 50 years.The International Index of Erectile Function-5 (IIEF-5),Brief Male Sexual Function Inventory for Urology ( O'Leary 1995 ) and the International Prostate Symptom Score (IPSS)questionnaires was recorded.The body mass index (BMI),prostate size was measured.The survey was conducted to make sure if the patients had diabetes,high blood pressure,hyperlipidemia,cerebrovascular history,and smoking and drinking situation.Pearson's X2 test and unconditional logistic regression were used to investigate the factors associated with sexual dysfunction. Results 1644 subjects were enrolled.The incidence of ED,reduction of sexual desire and defective ejaculation was 90.45％,60.04％ and 38.81％ respectively,and significantly different according to age ( P ＜ O.05 ). Age was positively correlated with ED (3 =0.12,P＜0.05),reduction of sexual desire (β =0.10,P＜0.05) and defective ejaculation (β =0.10,P ＜ 0.05 ) ; ED was significantly associated with BMI (β =0.07,P ＜ 0.05 ).Hypertension and prostate size were risk factors for reduction of sexual desire and defective ejaculation; There was correlation between drinking and defective ejaculation ( β =- O.31,P ＜ 0.05 ). Conelusions Compared with high prevalence of ED and lower sexual desire,the incidence of defective ejaculation were lower; this may reflect the sexual activities of aged male were more active compared with the less success of really erection.The prevalence of ED,reduction of sexual desire or defective ejaculation increased with age.BMI was the risk factor for ED.Enlarged prostate and hypertension was associated with reduction of sexual desire,and drinking was the risk factor for defective ejaculation.