Table 1.
The descriptive characteristics of included studies
| First author and Publication year | Study year | Study locations | Setting | Sampling method | Survey method | Recall windows(months) | Sample size | AHRQ score |
|---|---|---|---|---|---|---|---|---|
| Zhu, 2019-1[9] | 2015 | Guangdong | VCT | Not reported | Face-to-face | 6 | 520 | 5 |
| Zhu, 2019-2 [9] | 2016 | Guangdong | VCT | Not reported | Face-to-face | 6 | 516 | 5 |
| Zhu, 2019-3 [9] | 2014 | Guangdong | VCT | Not reported | Face-to-face | 6 | 163 | 5 |
| Zhu, 2019-4 [9] | 2015 | Guangdong | VCT | Not reported | Face-to-face | 6 | 357 | 5 |
| Zhu, 2019-5 [9] | 2016 | Guangdong | VCT | Not reported | Face-to-face | 6 | 344 | 5 |
| Yu, 2019-1 [10] | 2017 | Sichuan | Multiple recruitment methods | Not reported | Face-to-face | 6 | 410 | 5 |
| Yu, 2019−2 [10] | 2017 | Sichuan | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 460 | 5 |
| Wu, 2019 [11] | Not reported | Guangdong | VCT | Snowball sampling + RDS | Face-to-face | 6 | 434 | 8 |
| Pan, 2019-1 [12] | 2015 | Guizhou | Multiple recruitment methods | Not reported | Face-to-face | 6 | 248 | 5 |
| Pan, 2019-2 [12] | 2016 | Guizhou | Multiple recruitment methods | Not reported | Face-to-face | 6 | 250 | 5 |
| Pan, 2019-3 [12] | 2017 | Guizhou | Multiple recruitment methods | Not reported | Face-to-face | 6 | 252 | 5 |
| Pan, 2019-4 [12] | 2018 | Guizhou | Multiple recruitment methods | Not reported | Face-to-face | 6 | 253 | 5 |
| Duan, 2019 [13] | 2016 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 1306 | 5 |
| Ding, 2019 [14] | 2014 | Henan | MSM venues | Snowball sampling | Not reported | 6 | 205 | 5 |
| Zeng, 2019 [15] | 2016 | Guangxi | Social organization | Convenience sampling | Face-to-face | 6 | 375 | 6 |
| Wu, 2019 [16] | 2016–2017 | Hunan | Social organization | Not reported | Web based | 6 | 556 | 5 |
| Tang, 2018 [17] | 2013 | Zhejiang | Multiple recruitment methods | Convenience sampling | Face-to-face | 3 | 238 | 5 |
| Sun, 2018 [18] | 2015–2016 | Guangdong | Multiple recruitment methods | Snowball sampling | Self-administered | 6 | 334 | 6 |
| Hu, 2018 [19] | 2017 | Chongqing | MSM venues | Not reported | Face-to-face | 12 | 300 | 6 |
| Guo, 2018 [20] | 2013–2015 | Jiangsu | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 1895 | 6 |
| Lin, 2017 [21] | 2013–2015 | Zhejiang | MSM venues | Convenience sampling | Face-to-face | 6 | 1399 | 5 |
| Guo, 2017 [22] | 2013–2015 | Jiangsu | Not reported | Snowball sampling | Face-to-face | 6 | 2377 | 6 |
| Wang, 2016 [23] | Not reported | Yunnan | NGO | Snowball sampling + RDS | Face-to-face | 6 | 557 | 5 |
| Qiu, 2016 [24] | 2012–2015 | Hubei | Not reported | Snowball sampling | Face-to-face | 6 | 1559 | 5 |
| Li 2016 [25] | 2014–2016 | Guangdong | MSM venues | TLS + Snowball sampling | Not reported | 6 | 801 | 5 |
| Lei, 2016 [26] | 2014 | Hunan | NGO | Snowball sampling RDS | Not reported | 6 | 604 | 6 |
| Gong, 2016 [27] | 2011–2015 | Shandong | MSM venues | Not reported | Face-to-face | 6 | 1350 | 6 |
| Du, 2016 [28] | Not reported | Jiangxi | Not reported | Not reported | Self-administered | 6 | 117 | 5 |
| Ding, 2016 [29] | 2014–2015 | Zhejiang | Working group | Snowball sampling + RDS | Face-to-face | 3 | 351 | 5 |
| Zhao, 2015 [30] | 2012–2014 | Liaoning | Not reported | Snowball sampling | Face-to-face | 6 | 1208 | 5 |
| Zhang, 2015 [31] | 2009 | Yunnan | Not reported | Snowball sampling | Face-to-face | 6 | 453 | 6 |
| Zhang, 2015 [32] | Not reported | Shanghai | Social organization | Snowball sampling | Face-to-face | 6 | 673 | 5 |
| Wang, 2015 [33] | 2013 | Liaoning | Not reported | RDS | Face-to-face | 6 | 900 | 5 |
| Wang, 2015 [34] | 2013–2014 | Shandong | Not reported | Not reported | Face-to-face | 6 | 408 | 5 |
| Tang, 2015 [35] | Not reported | Zhejiang | Multiple recruitment methods | RDS | Not reported | 3 | 238 | 5 |
| Sun, 2015 [36] | 2014 | Not reported | working group | non-probability sampling | Face-to-face | 6 | 524 | 5 |
| Ren, 2015 [37] | 2008–2009 | Shaanxi | Not reported | Snowball sampling | Not reported | 6 | 1365 | 5 |
| Peng, 2015 [38] | 2013–2014 | Guangdong | Not reported | Convenience sampling | Face-to-face | 6 | 369 | 6 |
| Long, 2015 [39] | 2014 | Guangdong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 421 | 5 |
| Li, 2015 [40] | Not reported | Heilongjiang | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 400 | 5 |
| Gong, 2015-1 [41] | 2010 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 310 | 5 |
| Gong, 2015-2 [41] | 2011 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 350 | 5 |
| Gong, 2015-3 [41] | 2012 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 402 | 5 |
| Gong, 2015-4 [41] | 2013 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 364 | 5 |
| Gong, 2015-5 [41] | 2014 | Shandong | Multiple recruitment methods | Snowball sampling | Face-to-face | 6 | 329 | 5 |
| Chen, 2018 [42] | 2010–2017 | Zhejiang | Not reported | Non-probability sampling | Not reported | 6 | 334 | 5 |