Table 1.
Characteristics of MSM participants in the overall, training, and validation dataset.
| Characteristics and subgroup | Overall dataset (N=999), n (%) | Training dataset (n=667), n (%) | Validation dataset (n=332), n (%) | P value | |
| Age (years) |
|
|
|
.42 | |
|
|
≤24 | 487 (48.7) | 317 (47.5) | 170 (51.2) |
|
|
|
>24 | 512 (51.3) | 350 (52.5) | 162 (48.8) |
|
| Local residence |
|
|
|
.67 | |
|
|
Yes | 650 (65.1) | 431 (64.6) | 219 (66.0) |
|
|
|
No | 349 (34.9) | 236 (35.4) | 113 (34.0) |
|
| Ethnicity |
|
|
|
.82 | |
|
|
Non-Han | 142 (14.2) | 96 (14.4) | 46 (13.9) |
|
|
|
Han | 857 (85.8) | 571 (85.6) | 286 (86.1) |
|
| Monthly income (US$) |
|
|
|
.54 | |
|
|
<430 | 652 (65.3) | 431 (64.6) | 221 (66.6) |
|
|
|
≥430 | 347 (34.7) | 236 (35.4) | 111 (33.4) |
|
| Education |
|
|
|
.81 | |
|
|
Less than high school | 342 (34.2) | 224 (33.6) | 118 (35.5) |
|
|
|
High school | 259 (25.9) | 176 (26.4) | 83 (25.0) |
|
|
|
College and above | 398 (39.8) | 267 (40.0) | 131 (39.5) |
|
| Marital status |
|
|
|
.48 | |
|
|
Single | 752 (75.3) | 507 (76.0) | 245 (73.8) |
|
|
|
Married or cohabiting with a partner | 247 (24.7) | 160 (24.0) | 87 (26.2) |
|
| AIDS knowledge scores |
|
|
|
.64 | |
|
|
<8 | 558 (55.9) | 376 (56.4) | 182 (54.8) |
|
|
|
8 | 441 (44.1) | 291 (43.6) | 150 (45.2) |
|
| Age of sexual debut with males (years) |
|
|
|
.58 | |
|
|
<30 | 917 (91.8) | 610 (91.5) | 307 (92.5) |
|
|
|
≥30 | 82 (8.2) | 57 (8.5) | 25 (7.5) |
|
| Main venue used to seek male sexual partners |
|
|
|
.32 | |
|
|
Internet | 527 (52.8) | 360 (54.0) | 167 (50.3) |
|
|
|
Bars/dance halls | 43 (4.3) | 31 (4.6) | 12 (3.6) |
|
|
|
Parks/public baths | 429 (42.9) | 276 (41.4) | 153 (46.1) |
|
| Had regular male sexual partners |
|
|
|
.59 | |
|
|
Yes | 571 (57.2) | 385 (57.7) | 186 (56.0) |
|
|
|
No | 428 (42.8) | 282 (42.3) | 146 (44.0) |
|
| Had casual male sexual partners |
|
|
|
.74 | |
|
|
Yes | 597 (59.8) | 396 (59.4) | 201 (60.5) |
|
|
|
No | 402 (40.2) | 271 (40.6) | 131 (39.5) |
|
| Number of male sexual partners |
|
|
|
.93 | |
|
|
<3 | 612 (61.3) | 408 (61.2) | 204 (61.4) |
|
|
|
≥3 | 387 (38.7) | 259 (38.8) | 128 (38.6) |
|
| Had condomless insertive anal intercourse |
|
|
|
.52 | |
|
|
Yes | 384 (38.4) | 261 (39.1) | 123 (37.0) |
|
|
|
No | 615 (61.6) | 406 (60.9) | 209 (63.0) |
|
| Had condomless receptive anal intercourse |
|
|
|
.51 | |
|
|
Yes | 351 (35.1) | 239 (35.8) | 112 (33.7) |
|
|
|
No | 648 (64.9) | 428 (64.2) | 220 (66.3) |
|
| Rush poppers use |
|
|
|
.92 | |
|
|
Yes | 100 (10.0) | 65 (9.7) | 35 (10.5) |
|
|
|
No | 538 (53.9) | 361 (54.1) | 177 (53.3) |
|
|
|
Not available | 361 (36.1) | 241 (36.1) | 120 (36.1) |
|
| Tested positive for syphilis |
|
|
|
.55 | |
|
|
Yes | 81 (8.1) | 57 (8.5) | 24 (7.2) |
|
|
|
No | 685 (68.6) | 450 (67.5) | 235 (70.8) |
|
|
|
Not tested | 233 (23.3) | 160 (24.0) | 73 (22.0) |
|