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《South China Journal of Preventive Medicine》 2009-06
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Respondent-driven sampling used to estimate the number of men who have sex with men in a western city of China

CHA Gan-hua*,MIAO Zhi-feng,WANG Li-yan,et al.* Center for Disease Prevention and Control of Ningxia Province,Yinchuan 750004,China  
Objective To estimate the population size of men who have sex with men(MSM) in a western city of China to provide scientific data for planning of targeted prevention among MSM in the city.Methods In 2006,Respondent-driven sampling(RDS) was applied to recruit MSM in the targeted city.A structured questionnaire guided face to face interview was applied to obtain the proportion of MSM(1/m) who had visited the websites during the given period.The number of MSM(r) who visited website during a given period was investigated by a web-based questionnaire.Therefore,population size can be estimated by r multiplied by m.Results A total of 90 MSM were recruited within 3 months.The estimated number of MSM in the western city of China were 3 372(90%CI:2 513-4 612),which accounted for 1.20%(90%CI:0.9%-1.64%) of the adult males aged 15-49 years.Conclusion RDS with multiplier is an effective way to estimate the number of MSM.
【Fund】: 美国GAP项目;; 宁夏自然科学基金项目(NX08154)
【CateGory Index】: R195
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