Table 2.
Demographic, social and sexual behavioural covariates of chlamydia infection and any STI
| Tested, N | Chlamydia | Any STI | |||||
|---|---|---|---|---|---|---|---|
| Positive | % | P | Positive | % | P | ||
| Age (years) | 0·013 | 0·0003 | |||||
| 16–19 | 76 | 19 | 25·0 | 23 | 30·3 | ||
| 20–24 | 245 | 44 | 18·0 | 53 | 21·6 | ||
| ⩾25 | 429 | 47 | 11·0 | 57 | 13·3 | ||
| Marital status | 0·039 | 0·045 | |||||
| Ever married | 407 | 50 | 12·3 | 62 | 15·2 | ||
| Never married | 340 | 60 | 17·6 | 71 | 20·9 | ||
| Education | 0·049 | 0·0073 | |||||
| Elementary/none | 193 | 20 | 10·4 | 22 | 11·4 | ||
| Junior high or above | 556 | 90 | 16·2 | 111 | 20·0 | ||
| Monthly income (yuan*) | 0·003 | 0·0002 | |||||
| <3000 | 377 | 41 | 10·9 | 48 | 12·7 | ||
| ⩾3000 | 360 | 67 | 18·6 | 83 | 23·1 | ||
| Origin | 0·053 | 0·0039 | |||||
| Zhenjiang/Shanghai | 140 | 12 | 8·6 | 12 | 8·6 | ||
| East China, other | 210 | 42 | 20·0 | 51 | 24·3 | ||
| Southwest/South | 191 | 29 | 15·2 | 33 | 17·3 | ||
| Central China | 144 | 20 | 13·9 | 29 | 20·1 | ||
| North | 59 | 7 | 11·9 | 8 | 13·6 | ||
| Venue | 0·020 | 0·069 | |||||
| KTV/night club/spa pool | 216 | 39 | 18·1 | 45 | 20·8 | ||
| Barbershop | 289 | 45 | 15·6 | 55 | 19·0 | ||
| Foot massage | 215 | 19 | 8·8 | 26 | 12·1 | ||
| Beauty salon/bathhouse/other | 30 | 7 | 23·3 | 7 | 23·3 | ||
| Duration of sex work | n.s. | n.s. | |||||
| <4 months | 132 | 22 | 16·7 | 29 | 22·0 | ||
| ⩾4 months | 554 | 79 | 14·3 | 94 | 17·0 | ||
| Number of clients per week | 0·017 | 0·011 | |||||
| 1 | 65 | 16 | 24·6 | 19 | 29·2 | ||
| 2–9 | 361 | 50 | 13·9 | 61 | 16·9 | ||
| 10–14 | 68 | 15 | 22·1 | 18 | 26·5 | ||
| ⩾15 | 106 | 10 | 9·4 | 13 | 12·3 | ||
| Condom use in the last three sex acts with clients | 0·043 | 0·059 | |||||
| Inconsistent | 199 | 21 | 10·6 | 27 | 13·6 | ||
| Consistent | 494 | 82 | 16·6 | 97 | 19·6 | ||
| Self-efficacy of condom use | n.s. | n.s. | |||||
| Self-efficacy score <12 | 239 | 30 | 12·6 | 36 | 15·1 | ||
| Self-efficacy score ⩾12 | 484 | 77 | 15·9 | 93 | 19·2 | ||
| Price per sex act (yuan*) | 0·0009 | 0·0009 | |||||
| <100 | 312 | 32 | 10·3 | 41 | 13·1 | ||
| 100–399 | 273 | 43 | 15·8 | 51 | 18·7 | ||
| ⩾400 | 149 | 35 | 23·5 | 41 | 27·5 | ||
| Alcohol use | 0·047 | 0·044 | |||||
| Never | 324 | 38 | 11·7 | 47 | 14·5 | ||
| Ever drinking alcohol | 426 | 72 | 16·9 | 86 | 20·2 | ||
| Drug use | 0·0094 | 0·0071 | |||||
| Never | 696 | 97 | 13·9 | 118 | 17·0 | ||
| Ever used drug | 42 | 12 | 28·6 | 14 | 33·3 | ||
| Perceived STI risk | 0·079 | 0·018 | |||||
| Not likely | 616 | 86 | 14·0 | 102 | 16·6 | ||
| Likely | 85 | 18 | 21·2 | 23 | 27·1 | ||
| STI knowledge (4 items) | n.s. | n.s. | |||||
| Correct <3 | 182 | 25 | 13·7 | 31 | 17·0 | ||
| Correct ⩾3 | 566 | 84 | 14·8 | 101 | 17·8 | ||
STI, Sexually transmitted infection; n.s., non-significant.
*
1 Chinese yuan = ~ $US 0·16.