title: [Estimation on the size of men who have sex with men among college students in Beijing through the Network Scale-Up Method (NSUM)].
abstract: 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.
  
  
  CONCLUSIONS
  Using the NSUM to estimate C of Beijing college students and size of MSM seemed to be credible which worth popularized.
authors: School of Sociology and Population Study, Renmin University of China, Beijing 100872, China.
authors: Jing
authors: J
authors: Guo
authors: School of Sociology and Population Study, Renmin University of China, Beijing 100872, China.
authors: Xiao-juan
authors: XJ
authors: Huang
authors: School of Sociology and Population Study, Renmin University of China, Beijing 100872, China.
authors: Xiu-bin
authors: XB
authors: Wang
authors: School of Sociology and Population Study, Renmin University of China, Beijing 100872, China.
authors: Hao-yi
authors: HY
authors: Weng
authors: National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention. Email:guowei@chinaaids.cn.
authors: Wei
authors: W
authors: Guo
mesh_terms: D000328:Adult; D018451:Homosexuality, Male / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D057228:Masculinity; D012044:Regression Analysis; D060756:Social Networking; D013334:Students