利用网络规模迭加法估计北京市大学生男男性行为人群规模

Estimation on the size of men who have sex with men among college students in Beijing through the Network Scale-Up Method （NSUM）

目的探讨网络规模迭加法估计北京在校大学生社交网络规模和男男性行为人群规模。方法利用网络规模迭加法估计北京市大学生的社交网规模，并通过反向预测法和态度倾向校正方法分别对社交网络规模C值和目标人群规模进行调整。结果北京市大学生平均社交网络规模为97人，不同专业类型、年级的大学生社交网络规模存在差异；应用网络规模迭加法估计的北京市大学生男男性行为人群规模为16260人，占在校大学生的3．96％。结论运用网络规模迭加法计算社交网络规模和敏感人群规模具有一定的可信性。

Objective Network Scale-Up Method （NSUM） was used to estimate the Personal Network Size （C） of college students in Beijing and the size of men who have sex with men （MSM）.Methods A survey was conducted on Beijing college students to estimate the personal network size （C） through NSUM and then using the back-estimating and attitude adjustment to correct C value and the size of the target population.Results The mean of C among Beijing college students was 97 and the differences of C between different majors and different grades were both statistically significant.Among Beijing College students,3.96% of them identified themselves as MSM,with the number as 16 260.Conclusion Using the NSUM to estimate C of Beijing college students and size of MSM seemed to be credible which worth popularized.