Table 4.
Comparisons of high-risk factors for HIV infection between men who have sex with men who were retained and who withdrew from the follow-up (N=686).
| High-risk factors for HIV infection | Retained (n=461), n (%) | Withdrew (n=225), n (%) | Chi-square | df | P value | |
| Used recreational drugs in the past 3 months | ||||||
| Yes | 141 (30.6) | 65 (28.9) | 0.2 | 1 | .65 | |
| No | 320 (69.4) | 160 (71.1) | N/Aa | N/A | N/A | |
| Age of sexual debut (years) | ||||||
| ≤20 | 205 (44.5) | 116 (51.6) | 3.1 | 1 | .08 | |
| >20 | 256 (55.5) | 109 (48.4) | N/A | N/A | N/A | |
| CAIb with male CPsc in the past 3 months | ||||||
| Yes | 77 (16.7) | 37 (16.4) | 0.0 | 1 | .93 | |
| No | 384 (83.3) | 188 (83.6) | N/A | N/A | N/A | |
| CAI with male SPsd in the past 3 months | ||||||
| Yes | 120 (26.0) | 54 (24.0) | 0.3 | 1 | .57 | |
| No | 341 (74.0) | 171 (76.0) | N/A | N/A | N/A | |
| Had group sex with males in the past 3 months | ||||||
| Yes | 31 (6.7) | 12 (5.3) | 0.5 | 1 | .48 | |
| No | 430 (93.3) | 213 (94.7) | N/A | N/A | N/A | |
| Number of SPs in the past 3 months | ||||||
| ≥2 | 51 (11.1) | 15 (6.7) | 3.4 | 1 | .07 | |
| <2 | 410 (88.9) | 210 (93.3) | N/A | N/A | N/A | |
| Number of CPs in the past 3 months | ||||||
| ≥5 | 43 (9.3) | 16 (7.1) | 0.9 | 1 | .33 | |
| <5 | 418 (90.7) | 209 (92.9) | N/A | N/A | N/A | |
| Positive for syphilis at baseline | ||||||
| Yes | 59 (12.8) | 18 (8.0) | 3.5 | 1 | .06 | |
| No | 402 (87.2) | 207 (92.0) | N/A | N/A | N/A | |
| Ever used GSNf apps to seek male sexual partners | ||||||
| Yes | 264 (57.1) | 167 (74.2) | 18.6 | 1 | <.01 | |
| No | 197 (42.7) | 70 (25.8) | N/A | N/A | N/A | |
| Used GSN apps to seek male sexual partners in the past 3 months | ||||||
| Yes | 239 (51.8) | 131 (58.2) | 2.5 | 1 | .12 | |
| No | 222 (48.2) | 94 (41.8) | N/A | N/A | N/A | |
aN/A: not applicable.
bCAI: condomless anal intercourse.
cCPs: casual partners.
dSPs: steady partners.
eGSN: geosocial networking.