Multiple log-binominal regression analysis of factors associated with syphilitic infection among middle-aged female sex workers
| Prevalent infection | Active or recent infection | |||
|---|---|---|---|---|
| aPR | 95% CI | aPR | 95% CI | |
| Age (years) | 1.03 | 1.02 to 1.05 | 1.03 | 0.99 to 1.07 |
| Education | ||||
| Primary or less | 1 | 1 | ||
| Middle school | 0.86 | 0.70 to 1.06 | 0.71 | 0.49 to 1.02 |
| High school or above | 0.82 | 0.55 to 1.21 | 0.56 | 0.27 to 1.17 |
| Marital status | ||||
| Married | 1 | 1 | ||
| Unmarred | 0.76 | 0.46 to 1.26 | 0.74 | 0.33 to 1.69 |
| Divorced or widowed | 1.05 | 0.85 to 1.29 | 1.12 | 0.79 to 1.59 |
| Residency | ||||
| Rural vs urban | 0.77 | 0.63 to 0.94 | 0.69 | 0.49 to 0.96 |
| Duration of sex work (years) | 0.99 | 0.96 to 1.02 | 0.94 | 0.89 to 1.01 |
| HIV/STI knowledge | 1.05 | 1.01 to 1.09 | 1.05 | 0.98 to 1.12 |
| Place for commercial sex | ||||
| Barbershop/message/sauna | 1 | 1 | ||
| Street/park/roadside hotel | 0.90 | 0.71 to 1.15 | 0.94 | 0.64 to 1.39 |
| Dancing hall and music bar | 0.46 | 0.23 to 0.90 | 0.73 | 0.27 to 1.99 |
| Rental home | 1.05 | 0.81 to 1.36 | 1.10 | 0.69 to 1.76 |
| Number of clients in the past 7 days | ||||
| 0–4 | 1 | 1 | ||
| 5–10 | 1.22 | 0.90 to 1.65 | 1.99 | 1.21 to 3.29 |
| 11–25 | 1.44 | 1.08 to 1.94 | 2.00 | 1.19 to 3.35 |
| ≥26 | 1.11 | 0.79 to 1.58 | 1.59 | 0.82 to 3.10 |
| Unprotected sex in the past 48 h verified by PSA | ||||
| Yes vs no | 1.57 | 1.28 to 1.93 | 2.01 | 1.41 to 2.86 |
| Having ever used illicit drugs | ||||
| Yes vs no | 1.22 | 0.90 to 1.65 | 1.38 | 0.76 to 2.50 |
| Self-perceived risk for STDs | ||||
| Impossible | 1 | 1 | ||
| Somewhat possible | 1.04 | 0.82 to 1.31 | 1.17 | 0.80 to 1.71 |
| Possible and sure | 1.68 | 1.28 to 2.20 | 1.48 | 0.90 to 2.44 |
| Study sites | ||||
| Hefei | 1 | 1 | ||
| Qingdao | 0.60 | 0.44 to 0.83 | 0.39 | 0.21 to 0.72 |
| Nanning | 0.23 | 0.16 to 0.34 | 0.42 | 0.25 to 0.69 |
Bold denoting p value of less than 0.05.
aPR, adjusted prevalence ratio.
PSA, prostate-specific antigen; STD, sexually transmitted diseases; STI, sexually transmitted infections.