Table 2.
Description of analytic sample by predicted substance-using classes (n = 570)
| Variables | Substance-Naïve (n = 404) | Substance-Novice (n = 143) | Chemsex (n = 23) | Fisher’s Exact Test p-value |
|||
|---|---|---|---|---|---|---|---|
| n/Mean | %/SD | n/Mean | %/SD | n/Mean | %/SD | ||
| Age | 21.7 | 2.18 | 22.4 | 2.11 | 22.3 | 1.77 | 0.001 |
| Chinese ethnicity (Ref = Non-Chinese) | 336 | 83.2% | 124 | 86.7% | 18 | 78.3% | 0.436 |
| Cisgender male (Ref = Transgender, genderqueer, or others) | 365 | 90.4% | 139 | 97.2% | 21 | 91.3% | 0.018 |
| Gay (Ref = Bisexual, queer, or others) | 268 | 66.3% | 122 | 85.3% | 18 | 78.3% | < 0.001 |
| Monthly household income ≥ SGD5000 (Ref < SGD5000) | 131 | 32.4% | 65 | 45.5% | 7 | 30.4% | 0.019 |
| Ever had sexualized substance use with | |||||||
| Alcohol | 96 | 76.2% | 81 | 56.6% | 13 | 56.5% | < 0.001 |
| Amyl nitrites (Poppers) | 0 | 0.0% | 139 | 97.2% | 22 | 95.7% | < 0.001 |
| Crystal methamphetamine (Meth) | 0 | 0.0% | 5 | 3.5% | 22 | 95.7% | < 0.001 |
| Gamma-Hydroxybutyrate/Gamma-Butyrolactone (GHB/GBL) | 0 | 0.0% | 5 | 3.5% | 22 | 95.7% | < 0.001 |
| Erectile dysfunction drugs (ED) | 0 | 0.0% | 9 | 6.3% | 17 | 73.9% | < 0.001 |
| Ever contemplated suicide | 207 | 51.2% | 82 | 57.3% | 19 | 82.6% | 0.007 |
| Unprotected anal sex with casual partners in the last 6 months | 51 | 12.6% | 36 | 25.2% | 9 | 39.1% | < 0.001 |
| Tested positive for an STI in the last 6 months | 22 | 5.5% | 15 | 10.5% | 2 | 8.7% | 0.083 |
| Depression severity (PHQ-9) | 7.9 | 6.69 | 7.4 | 6.60 | 11.4 | 8.87 | 0.030 |
Abbreviation: SD Standard Deviation, STI Sexually Transmitted Infections, GHB/GBL Gamma-Hydroxybutyrate/Gamma-Butyrolactone, PHQ-9 Patient Health Questionnaire-9