Table 1. Characteristics of all participants, and participants grouped by lifetime synthetic drug use.
| Variables | All Participants N (%) |
Synthetic Druga User Subgroup Comparison | |||
|---|---|---|---|---|---|
| Non-User n (%) |
User n (%) |
χ2 Value | P-Valueb | ||
| Overall | 3,135 (100) | 1,886 (100) | 1,249 (100) | ||
| Age | |||||
| <30 years | 1,822 (58.1) | 991 (52.5) | 831 (66.5) | 60.4 | <0.001 |
| ≥30 years | 1,313 (41.8) | 895 (47.5) | 418 (33.5) | ||
| Ethnicity | |||||
| Han | 2,864 (91.4) | 1,730 (91.7) | 1,134 (90.8) | 0.8 | 0.36 |
| Other | 271 (8.6) | 156 (8.3) | 115 (9.2) | ||
| Marital Status | |||||
| Single | 2,264 (72.2) | 1,271 (67.4) | 993 (79.5) | 55.3 | <0.001 |
| Married/cohabitating | 731 (23.3) | 513 (27.2) | 218 (17.5) | ||
| Divorced/widowed | 140 (4.5) | 102 (5.4) | 38 (3.0) | ||
| Education Level | |||||
| ≤High school | 1,202 (38.3) | 784 (41.6) | 418 (33.5) | 20.9 | <0.001 |
| ≥College | 1,933 (61.7) | 1,102 (58.4) | 831 (66.5) | ||
| Monthly Income | |||||
| <CNY 3,000 | 1,132 (36.1) | 697 (37.0) | 435 (34.8) | 1.5 | 0.22 |
| ≥CNY 3,000 | 2,003 (63.9) | 1,189 (63.0) | 814 (65.2) | ||
| Frequency of Male-Male Sexual Behaviors | |||||
| <1 time per week | 1,912 (61.0) | 1,211 (64.2) | 701 (56.1) | 19.9 | <0.001 |
| ≥1 time per week | 1,220 (38.9) | 675 (35.8) | 545 (43.7) | ||
| Missing | 3 (0.1) | 0 (0.0) | 3 (0.2) | ||
| Number of Male Sexual Partners | |||||
| 1 | 1,358 (43.3) | 918 (48.7) | 440 (35.2) | 54.5 | <0.001 |
| ≥2 | 1,774 (56.6) | 968 (51.3) | 806 (64.5) | ||
| Missing | 3 (0.1) | 0 (0.0) | 3 (0.2) | ||
| Participated in Male Group Sex | |||||
| Yes | 153 (4.9) | 61 (3.2) | 92 (7.4) | 27.8 | <0.001 |
| No | 2,979 (95.0) | 1,825 (96.8) | 1,154 (92.4) | ||
| Missing | 3 (0.1) | 0 (0.0) | 3 (0.2) | ||
| Duration of Penetrative Sexual Behavior | |||||
| <20 minutes | 1,321 (42.1) | 894 (47.4) | 427 (34.2) | 56.1 | <0.001 |
| ≥20 minutes | 1,802 (57.5) | 980 (52.0) | 822 (65.8) | ||
| Missing | 12 (0.4) | 12 (0.6) | 0 (0.0) | ||
| Consistent Condom Use with Male Partners | |||||
| Yes | 1,460 (46.6) | 906 (48.0) | 554 (44.3) | 4.2 | 0.04 |
| No | 1,671 (53.3) | 977 (51.8) | 694 (55.6) | ||
| Missing | 4 (0.1) | 3 (0.2) | 1 (0.1) | ||
| HIV Serostatus | |||||
| Positive | 246 (7.8) | 114 (6.0) | 132 (10.6) | 21.3 | <0.001 |
| Negative | 2,889 (92.2) | 1,772 (94.0) | 1,117 (89.4) | ||
aThe term “synthetic drug” included ecstasy, ketamine, methamphetamine, Magu (combination of methamphetamine and caffeine), and “poppers” (inhaled alkyl nitrites).
bSubgroups were compared using χ2 test to generate p-values listed.