Table 2 Subgroup analysis of heterosexual behavior in MSM population
Variables | Subgroups | The number of studies | The prevalence of heterogeneity behaviors among MSM and 95% CI | I2 |
|---|---|---|---|---|
Study locations | Northeast China | 3 | 15.3% (8.30%, 27.5%) | 98% |
|  | Northwest China | 1 | 19.4% (17.4%, 21.9%) | – |
| Â | East China | 17 | 26.5% (23.1%, 31.0%) | 96% |
| Â | Central China | 4 | 20.6% (9.90%, 37.9%) | 98% |
| Â | South China | 11 | 13.0% (8.30%, 20.0%) | 97% |
| Â | Southwest China | 9 | 11.5% (7.40%, 17.4%) | 97% |
|  | Not reported | 1 | 26.0% (22.5%, 29.6%) | – |
setting | VCT | 6 | 9.10  (6.5%, 12.3%) | 79% |
| Â | MSM venues | 5 | 37.9% (34.2%, 41.5%) | 79% |
| Â | Social organization | 3 | 13.0% (5.70%, 25.9%) | 97% |
| Â | NGO | 2 | 16.0% (13.8%, 18.0%) | 0% |
| Â | Working group | 2 | 25.9% (23.1%, 28.6%) | 0% |
| Â | Multiple recruitment methods | 18 | 15.3% (11.5%, 19.4%) | 96% |
| Â | Not reported | 10 | 25.4% (22.5%, 29.1%) | 92% |
Sampling method | Snowball sampling | 18 | 22.5% (18.7%, 25.9%) | 96% |
| Â | RDS | 2 | 23.1% (12.3%, 38.7%) | 94% |
|  | Snowball sampling + RDS | 4 | 17.4% (13.8%, 22.5%) | 86% |
| Â | Convenience sampling | 4 | 22.5% (13.0%, 36.3%) | 97% |
| Â | Not reported or other | 18 | 13.8% (9.9%, 19.4%) | 97% |
Survey method | Face-to-face | 37 | 17.4% (15.3%, 20.0%) | 97% |
| Â | Self-administered | 21 | 27.5% (23.7%, 32.0%) | 0% |
|  | Web based | 1 | 5.70% (3.80%, 8.30%) | – |
| Â | Not reported | 6 | 27.5% (18.7%, 38.3%) | 97% |
Recall windows | 3 momths | 3 | 20.6% (18.0%, 23.7%) | 79% |
| Â | 6 months | 42 | 35.1% (23.7%, 24.8%) | 97% |
| Â | 12 months | 1 | 35.1% (29.6%, 40.5%) | - |
Sample size | < 500 | 29 | 17.4% (13.8%, 21.3%) | 96% |
|  | 500–1000 | 9 | 16.7% (11. 5%, 23.7%) | 97% |
|  | 1000–1500 | 5 | 25.9% (18.7%, 34.6%) | 98% |
|  | > 1500 | 3 | 23.1% (18.7% , 28.6%) | 95% |
Study year | 2016 ago | 26 | 25.9% (25.4% , 26.5% ) | 97% |
|  | Since 2016 | 11 | 16.7% (16.0% , 18.0%) | 97% |
|  | Not reported or others | 9 | 25.4% (23.7 , 27.0%) | 96% |