Table 1.
Demographics, sexual behaviors and HIV/syphilis infections by substance use status among 3,588 MSM in Beijing, China.
| Variable | Overall (N = 3588), % | Drug use (binary) | Alcohol use (binary) | Frequency of alcohol use | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
|
|
|
||||||||
| Never (N = 2600), % | Ever (N = 988),% | Never (N = 1574), % | Ever (N = 2014), % | Never (N = 1574), % | ≤1/month (N =1108),% | 2-4/month (N = 594),% | >2-3/week (N = 312), % | p for trenda | ||
| Demographics | 100.0 | 72.5 | 27.5 | 43.9 | 56.1 | 43.9 | 30.9 | 16.6 | 8.7 | |
| Age, mean (SD) | 29.9 (7.8) | 30.39 (8.45) | 28.41 (5.71)*** | 30.3 (8.6) | 29.5 (7.2)** | 30.3 (8.6) | 29.0 (6.9) | 29.3 (6.8) | 31.4 (8.2)*** | 0.214 |
| Han-ethnic (%) | 93.7 | 94.5 | 91.6** | 93.7 | 93.6 | 93.7 | 94.5 | 93.4 | 91.0 | 0.191 |
| Not married (%) | 85.0 | 82.7 | 91.0*** | 84.6 | 85.3 | 84.6 | 87.5 | 84.3 | 79.2** | 0.097 |
| College or above education (%) | 71.9 | 68.8 | 80.0*** | 71.1 | 72.5 | 71.1 | 76.7 | 73.4 | 55.8*** | 0.002 |
| Employed (%) | 82.5 | 81.3 | 85.7** | 80.9 | 83.8* | 80.9 | 81.2 | 87.5 | 85.6*** | 0.001 |
| ≥5000 yuan/monthly income (%) | 52.7 | 48.0 | 65.0*** | 48.7 | 55.8*** | 48.7 | 53.4 | 60.4 | 55.1*** | 0.000 |
| Having a health insurance plan (%) | 61.1 | 58.9 | 67.0*** | 59.3 | 62.6* | 59.3 | 65.4 | 64.0 | 49.7*« | 0.370 |
| Having Beijing Hukou | 24.8 | 24.8 | 24.8 | 25.4 | 24.3 | 25.4 | 24.6 | 25.3 | 21.2 | 0.235 |
| Duration of living in Beijing (year) mean, SD | 9.5 (11.4) | 9.6 (11.8) | 9.2 (10.0) | 9.9 (11.6) | 92 (11.1)* | 9.9 (11.6) | 8.7 (10.7) | 9.4 (11.4) | 10.9 (12.0)** | 0.382 |
| Age of sex debut (year) mean, SDb | 20.8 (4.0) | 21.0 (4.2) | 20.04 (3.16)*** | 20.8 (4.3) | 20.7 (3.8) | 20.8 (4.2) | 21.0 (35) | 20.7 (4.5) | 19.9 (3.4)*** | 0.005 |
| Outcomes | ||||||||||
| HIV infection | 12.7 | 11.4 | 16.0*** | 12.9 | 12.5 | 12.9 | 10.9 | 14.7 | 14.1 | 0.376 |
| Syphilis infection | 7.4 | 7.3 | 7.6 | 7.4 | 7.3 | 7.4 | 6.3 | 7.7 | 9.9 | 0.257 |
| Sexual Behaviors with Male Partners | ||||||||||
| Condomless RAI in the past 3m | 20.4 | 17.6 | 27.8*** | 18.0 | 22.3** | 18.0 | 21.9 | 22.1 | 24.0* | 0.003 |
| Condomless IAI in the past 3m | 21.9 | 21.3 | 23.7 | 17.2 | 25.7*** | 17.2 | 22.5 | 28.1 | 32.4*** | 0.000 |
| Number of lifetime male sexual partners (<10persons) | 50.6 | 555 | 37.7*** | 52.5 | 49.1 | 52.5 | 53.3 | 45.1 | 41.4 | 0.000 |
| Number of male partners in the past 3 months (≤1person) | 52.4 | 57.6 | 38.7*** | 53.1 | 51.8 | 53.1 | 55.5 | 48.8 | 44.2** | 0.004 |
| Sexual Behaviors with Female Partners | ||||||||||
| Having sex with female partners in the past 3 months | 10.5 | 11.9 | 6.8*** | 8.5 | 12.1*** | 8.5 | 9.4 | 13.8 | 18.3*** | 0.000 |
| Having sex with female partners in lifetime | 39.6 | 41.4 | 34.7*** | 34.2 | 43.7*** | 34.2 | 37.4 | 46.1 | 61.5*** | 0.000 |
| Having condomless sex with female partners in the past 3 months | 6.6 | 7.4 | 4.4** | 5.6 | 7.3* | 5.7 | 5.9 | 7.2 | 12.8*** | 0.000 |
SD: standard deviation; RAI: receptive anal intercourse; IAI: insertive anal intercourse.
*
p < 0.05,
**
p < 0.01,
***
p < 0.001 (for ANOVA and Chi-square tests);
a
P-value for trend tests.