Relations between genital chlamydial infection and potential risk factors
| Demographic and sexual behaviour correlate of the screened participants | Number of chlamydia positive participants/ total number in the same group | Prevalence of chlamydia positive participants/total number of screened participants in the same group | 95% CI | Crude odds ratio | 95% CI | p Value | Adjusted odds ratio | 95% CI | p Value |
|---|---|---|---|---|---|---|---|---|---|
| *Normal = ⩽14 units/week for women and ⩽21 units/week for men. | |||||||||
| †High = >14 units/week for women and >21 units/week for men. | |||||||||
| Age (years) | |||||||||
| <21 | 6/62 | 9.67% | 3.6 to 19.9 | 1 | 1 | ||||
| ⩾21 | 12/370 | 3.24% | 1.8 to 5.8 | 0.31 | 0.11 to 0.87 | 0.045 | 0.456 | 0.148 to 1.40 | 0.17 |
| Sex | |||||||||
| Male | 6/236 | 2.54% | 1.0 to 5.7 | 1 | 1 | ||||
| Female | 12/196 | 6.12% | 3.2 to 10.5 | 2.5 | 0.93 to 6.86 | 0.064 | 2.55 | 0.85 to 7.63 | 0.094 |
| Number of sexual partner (s) in the past year | |||||||||
| <2 | 6/305 | 1.96% | 0.8 to 4.4 | 1 | 1 | ||||
| 2 | 5/65 | 7.69% | 2.5 to 17.0 | 4.1 | 1.2 to 14.1 | 0.038 | 3.82 | 1.00 to 14.61 | 0.05 |
| >2 | 7/62 | 11.29% | 4.6 to 4.8 | 6.3 | 2.1 to 19.6 | 0.001 | 7.96 | 2.24 to 28.19 | 0.001 |
| Ethnicity | |||||||||
| White | 11/315 | 3.49% | 1.8 to 6.3 | 1 | 1 | ||||
| Black | 6/66 | 9.09% | 3.4 to 18.7 | 2.76 | 0.98 to 7.8 | 0.093 | 1.7 | 0.52 to 5.60 | 0.376 |
| Others | 1/51 | 1.96% | 0.1 to 11.7 | 0.55 | 0.1 to 4.38 | 0.88 | 0.81 | 0.09 to 6.96 | 0.849 |
| Condom use | |||||||||
| Never | 4/147 | 2.72% | 0.8 to 7.3 | 1 | 1 | ||||
| Sometimes | 10/205 | 4.87% | 2.4 to 9.0 | 1.8 | 0.56 to 5.96 | 0.31 | 0.97 | 0.26 to 3.63 | 0.967 |
| Always | 4/80 | 5.00% | 1.3 to 12.3 | 1.88 | 0.46 to 7.73 | 0.61 | 0.928 | 0.19 to 4.50 | 0.926 |
| Alcohol intake/week | |||||||||
| Normal* | 17/399 | 4.26% | 2.6 to 6.9 | 1 | 1 | ||||
| High† | 1/33 | 3.03% | 0.2 to 17.5 | 0.56 | 0.07 to 4.3 | 0.91 | 0.448 | 0.52 to 3.82 | 0.463 |