Table 3 Bivariate and multivariate analyses on the demographic and sex behavioral correlates of STI infection among non-sex worker Japanese women.
Characteristic | Crude odds ratio | 95%CI* | Adjusted odds ratio†| 95%CI |
|---|---|---|---|---|
Socio-demographic factors | ||||
   Age (years) | 0.83 | 0.80-0.86 | 0.94 | 0.89-0.99 |
   Occupation | ||||
Unemployed, full time student or housewife | 0.69 | 0.47-1.01 | 0.61 | 0.30-1.25 |
Others | 1.00 | 1.00 | ||
   Education | ||||
High school education or less | 0.86 | 0.60-1.21 | 0.76 | 0.39-1.48 |
University education or above | 1.00 | 1.00 | ||
   Marital status | ||||
Unmarried | 21.74 | 13.34-35.40 | 4.11 | 1.73-9.77 |
Married | 1.00 | 1.00 | ||
Behavioral factors | ||||
   First sexual experience (years) | ||||
≦18 | 7.26 | 4.87-10.82 | 1.77 | 0.89-3.54 |
≧19 | 1.00 | 1.00 | ||
   Number of sexual partners (previous year) | ||||
≧2 | 12.72 | 8.29-19.54 | 3.09 | 1.42-6.71 |
1 | 1.00 | 1.00 | ||
   Sex with regular partners (previous year) | ||||
Had unprotected vaginal sex | ||||
Yes | 3.02 | 1.78-5.11 | 3.59 | 1.49-8.64 |
No | 1.00 | 1.00 | ||
Had unprotected oral sex | ||||
Yes | 4.85 | 2.91-8.10 | 1.34 | 0.57-3.18 |
No | 1.00 | 1.00 | ||
Had unprotected anal sex | ||||
Yes | 1.56 | 0.76-3.18 | 0.83 | 0.23-2.95 |
No | 1.00 | 1.00 | ||
   Sex with casual partners (previous year) | ||||
Had unprotected vaginal and/or oral sex | ||||
Yes | 23.16 | 13.51-39.68 | 2.08 | 0.75-5.71 |
No | 1.00 | 1.00 |