Table 4 Poisson regression analysis of factors correlated with nitrite inhalants use in the past 6 months (N = 1151)
Factors | Multivariate analysis | |
|---|---|---|
Prevalence ratio (95% CI) | P value | |
Age (years) | ||
 > 25 | 1 |  |
 ≤ 25 | 1.04 (1.01–1.07) | 0.025 |
Occupation | ||
 Enterprise, public institution or government | 1 |  |
 Service industry, solo business owners and others | 1.01 (0.99–1.04) | 0.367 |
Marital status | ||
 Married, divorced or widowed | 1 |  |
 Single | 1.01 (0.98–1.04) | 0.602 |
Monthly individual income (CNY) | ||
 < 3000 | 1 |  |
 ≥ 3000 | 1.04 (1.01–1.09) | 0.003 |
Preferring sexual role with males | ||
 Insertive anal intercourse | 1 |  |
 Receptive anal intercourse | 1.04 (1.01–1.07) | 0.004 |
 Versatile anal intercourse | 1.05 (1.03–1.08) | < 0.001 |
Age at first anal intercourse (years) | ||
 ≥ 18 | 1 |  |
 < 18 | 1.05 (1.02–1.09) | 0.003 |
Seeking sex partners through gay applications in the past 6 months | ||
 No | 1 |  |
 Yes | 1.01 (0.99–1.03) | 0.46 |
Number of sex partners in the past 6 months | ||
 < 2 | 1 |  |
 ≥ 2 | 1.05 (1.03–1.07) | < 0.001 |
Group sex in the past 6 months | ||
 No | 1 |  |
 Yes | 1.37 (1.26–1.49) | < 0.001 |
Condomless internal ejaculation during anal sex in the past 6 months | ||
 No | 1 |  |
 Yes | 1.03 (1.01–1.06) | 0.008 |
HIV testing in the past 6 months | ||
 No | 1 |  |
 Yes | 1.02 (1.00–1.05) | 0.065 |
HIV infection | ||
 No | 1 |  |
 Yes | 1.05 (1.01–1.09) | 0.018 |
Syphilis infection | ||
 No | 1 |  |
 Yes | 1.06 (1.02–1.10) | 0.007 |