Odds ratios for associations between adolescent characteristics and a high vaginal pH (>4.5)
| Characteristic | Odds ratio (95% CI)* | p (logistic)† | |
|---|---|---|---|
| *CI, confidence interval. | |||
| †Adjusted for presence of BV and condom used at last sex. | |||
| ‡<21 days, >42 days or irregular. | |||
| Age (per year) | 1.4 (0.9 to 2.3) | 0.15 | |
| Frequency of sex (per group) | 1.1 (0.5 to 2.0) | 0.88 | |
| Douches | 0.6 (0.2 to 1.9) | 0.36 | |
| Has intercourse during menses | 0.5 (0.2 to 1.8) | 0.29 | |
| Became sexually active within the past 12 months | 0.2 (0.1 to 0.7) | 0.004 | |
| No condom at last sex | 0.8 (0.3 to 2.0) | 0.57 | |
| Lifetime partners (per group) | 1.0 (0.6 to 1.5) | 0.95 | |
| Tanner breast stage (per stage) | 1.5 (0.7 to 3.2) | 0.27 | |
| Presence of cervical ectopy | 2.5 (1.0 to 6.6) | 0.05 | |
| Disturbed menstrual cycle‡ | 0.7 (0.3 to 1.9) | 0.50 | |
| Body mass index (per kg/m2) | 1.0 (0.9 to 1.1) | 0.70 | |
| Gynaecological age (per year) | 1.0 (0.8 to 1.4) | 0.81 | |
| Uses oral contraceptives | 1.3 (0.5 to 3.5) | 0.59 | |
| Ever used Depo-Provera | 0.1 (0.0 to 0.7) | 0.003 | |
| Current or past smoker | 1.5 (0.5 to 4.7) | 0.51 | |
| Previous STI treatment | 2.5 (0.9 to 6.5) | 0.07 | |
| Current intermenstrual bleeding | 2.3 (0.5 to 10.3) | 0.28 | |