Author, year of publication | Location | Setting | Study year | Sampling method | Survey method | Recall window (months) | Sample size | QACO score (%) |
Cross-sectional study | ||||||||
Yang, 200514 | Sichuan | MSM venues | 2004 | Not reported | Interviewer-administered | 3 | 95 | 33 |
Cao, 200615 | Jiangsu | MSM venues | 2003 | Not reported | Self-administered | 3 | 143 | 50 |
Jiang, 200616 | Jiangsu | MSM venues | 2003 | Not reported | Self-administered | 3 | 144 | 80 |
Li, 200817 | Beijing | VCT | 2005–6 | Not reported | Interviewer-administered | 3 | 541 | 50 |
Cai, 200718 | Shandong | Member of working groups | 2006 | Not reported | Self-administered | 6 | 201 | 75 |
Chen, 200719 | Zhejiang | Multiple recruiting methods | 2005 | Not reported | Self-administered | 6 | 365 | 75 |
Chu, 2010* | Liaoning | VCT | 2008 | Snowball sampling | Interviewer-administered | 6 | 2074 | 60 |
Feng, 200820 | Chongqing | Multiple recruiting methods | 2007 | Snowball sampling | Interviewer-administered | 6 | 1044 | 80 |
Feng, 2009–121 | Chongqing | Multiple recruiting cethods | 2006 | Convenience sampling + respondent-driven sampling + web recruiting | Interviewer-administered | 6 | 1000 | 50 |
Feng, 2009–221 | Chongqing | Multiple recruiting methods | 2007 | Convenience sampling + respondent-driven sampling + web recruiting | Interviewer-administered | 6 | 1044 | 50 |
Gu, 200422 | Liaoning | MSM venues | 2003 | Not reported | Self-administered or interviewer-administered | 6 | 342 | 33 |
Guo, 200823 | Shandong | MSM venues | Not reported | Not reported | Interviewer-administered | 6 | 106 | 67 |
Guo, 200824 | Hebei | Multiple recruiting methods | 2007 | Not reported | Interviewer-administered | 6 | 118 | 75 |
Ha, 201025 | Guangdong | Not reported | Not reported | Respondent-driven sampling | Not reported | 6 | 351 | 50 |
He, 200626 | Guangdong | Multiple recruiting methods | 2004 | Convenience sampling | Interviewer-administered | 6 | 201 | 40 |
He, 200927 | Guangdong | Not reported | 2006 | Respondent-driven sampling | Interviewer-administered | 6 | 423 | 60 |
Lau, 200828 | Yunnan | Multiple recruiting methods | 2003–6 | Snowball sampling + convenience sampling | Interviewer-administered | 6 | 896 | 50 |
Lau, 2009–129 | Yunnan | Multiple recruiting methods | 2005 | Convenience sampling | Interviewer-administered | 6 | 387 | 75 |
Lau, 2009–229 | Yunnan | Not reported | 2006 | Not reported | Interviewer-administered | 6 | 316 | 75 |
Choi, 20047 | Beijing | MSM venues | 2001–2 | Respondent-driven sampling + other network | Interviewer-administered | 6 | 482 | 50 |
Choi, 200730 | Shanghai | Not reported | 2004–5 | Snowball sampling | Interviewer-administered | 6 | 477 | 80 |
Li, 200931 | Chongqing | MSM venues | 2006–7 | Snowball sampling | Interviewer-administered | 6 | 1691 | 40 |
Liang, 200932 | Hebei | VCT | 2008 | Snowball sampling | Interviewer-administered | 6 | 450 | 75 |
Liao, 200633 | Shandong | MSM venues | 2005 | Not reported | Self-administered | 6 | 157 | 50 |
Liu, 200734 | Beijing | MSM venues | 2005 | Not reported | Interviewer-administered | 6 | 416 | 40 |
Ouyang, 200835 | Chongqing | Multiple recruiting methods | 2006 | Snowball sampling | Interviewer-administered | 6 | 539 | 33 |
Qu, 200236 | Some city in the northeast | MSM venues | 2001 | Not reported | Interviewer-administered | 6 | 215 | 33 |
Ruan, 2009–137 | Shandong | Not reported | 2008 | Respondent-driven sampling | Interviewer-administered | 6 | 495 | 60 |
Ruan, 2009–237 | Shandong | Not reported | 2007 | Respondent-driven sampling | Interviewer-administered | 6 | 425 | 60 |
Ruan, 200738 | Beijing | Multiple recruiting methods | 2005 | Not reported | Interviewer-administered | 6 | 526 | 80 |
Shi, 200739 | Beijing | Multiple recruiting methods | 2005 | Not reported | Interviewer-administered | 6 | 526 | 50 |
Wang, 200840 | Heilongjiang | MSM venues | 2006 | Convenience sampling | Self-administered | 6 | 401 | 50 |
Wang, 200641 | Heilongjiang | MSM venues | 2004 | Not reported | Interviewer-administered | 6 | 397 | 33 |
Wang, 200942 | Hebei | MSM venues | 2008 | Snowball sampling | Interviewer-administered | 6 | 114 | 75 |
Wang, 201043 | Jiangsu | Multiple recruiting methods | 2008–9 | Not reported | Interviewer-administered | 6 | 750 | 40 |
Wong, 200944 | Guangxi | Multiple recruiting methods | Not reported | Snowball sampling | Realname surveys | 6 | 239 | 50 |
Yang, 200645 | Jiangsu | MSM venues | 2004 | Not reported | Interviewer-administered | 6 | 222 | 67 |
Yang, 200746 | Chongqing | Multiple recruiting methods | 2006 | Snowball sampling | Interviewer-administered | 6 | 1000 | 60 |
Zeng, 200647 | Guangdong | MSM venues | 2004 | Not reported | Self-administered | 12 | 233 | 40 |
Zhang, 200148 | All over the country | Member of working groups | 1999 | Not reported | Mail questionnaire | 12 | 729 | 33 |
Zhang, 200349 | All over the country | MSM who had participated in Pengyou project | 2001 | Not reported | Mail questionnaire | 12 | 1124 | 33 |
Cai, 200850 | Guangdong | MSM venues | 2006 | Not reported | Interviewer-administered | 12 | 458 | 33 |
Chen, 200751 | Guangdong | MSM venues | 2006 | Not reported | Self-administered | 12 | 182 | 50 |
Wang, 200952 | Yunnan | Multiple recruiting methods | 2008 | Convenience sampling | Interviewer-administered | 12 | 330 | 67 |
Shi, 200653 | Sichuan | MSM venues | 2005 | Snowball sampling + convenience sampling | Interviewer-administered | 12 | 214 | 67 |
Lin, 200754 | Guangdong | MSM venues | 2005 | Not reported | Self-administered | 12 | 101 | 33 |
Lu, 200855 | Beijing | Not reported | 2006 | Snowball sampling | Not reported | 12 | 200 | 40 |
Case–control study | ||||||||
Zhang, 201056 | Anhui | Not reported | 2006 | Respondent-driven sampling | Self-administered | 2 | 170 | 33 |
Cohort study | ||||||||
Xu, 201057 | Liaoning | Recruiting by NGO | 2006 | Not reported | Not reported | 12 | 218 | 60 |
↵* The new data collected from first author of the manuscript.
MSM, men who have sex with men; NGO, non-governmental organisation; QACO, quality assessment checklist for observational studies; VCT, voluntary counselling and testing.