Table 4.
Odds ratio for Bacterial Vaginosis by Season
| Winter | Spring | Summer | Fall | P-value | |
|---|---|---|---|---|---|
| All Women | |||||
| Unadjusted | 1.0 | 0.9 (0.8–1.1) | 1.2 (1.01–1.4) | 1.1 (0.97–1.3) | 0.007 |
| Adjusted for sexual factors | 1.0 | 0.9 (0.8–1.1) | 1.2 (1.00–1.3) | 1.1 (0.96–1.3) | 0.01 |
| Adjusted for sexual and health-related factors | 1.0 | 0.9 (0.8–1.1) | 1.2 (0.99–1.3) | 1.1 (0.96–1.3) | 0.01 |
| Adjusted for sexual, health-related and hygienic factors | 1.0 | 0.9 (0.8–1.1) | 1.2 (1.01–1.4) | 1.1 (0.96–1.3) | 0.01 |
| Women BV-negative at Study Entry | |||||
| Unadjusted | 1.0 | 1.0 (0.8–1.2) | 1.0 (0.8–1.2) | 0.9 (0.8–1.1) | 0.81 |
| Adjusted for sexual factors | 1.0 | 1.0 (0.8–1.2) | 1.0 (0.8–1.3) | 0.9 (0.8–1.2) | 0.83 |
| Adjusted for sexual and health-related factors | 1.0 | 1.0 (0.8–1.2) | 1.1 (0.9–1.3) | 0.9 (0.8–1.2) | 0.75 |
| Adjusted for sexual, health-related and hygienic factors | 1.0 | 1.0 (0.8–1.2) | 1.0 (0.8–1.3) | 0.9 (0.8–1.2) | 0.86 |
| Women BV-positive at Study Entry | |||||
| Unadjusted | 1.0 | 0.9 (0.7–1.1) | 1.4 (1.2–1.7) | 1.4 (1.1–1.7) | <0.001 |
| Adjusted for sexual factors | 1.0 | 0.9 (0.7–1.1) | 1.4 (1.1–1.7) | 1.3 (1.1–1.6) | <0.001 |
| Adjusted for sexual and health-related factors | 1.0 | 0.8 (0.7 -1.03) | 1.3 (1.1–1.7) | 1.3 (1.1–1.7) | <0.001 |
| Adjusted for sexual, health-related and hygienic factors | 1.0 | 0.8 (0.7–1.1) | 1.4 (1.1–1.7) | 1.4 (1.1–1.7) | <0.001 |
Adjusted by conditional logistic regression. Sexual factors- frequency of vaginal intercourse, frequency of receptive oral sex, number of recent sex partners, new partner since last study visit, current hormonal contraception use. Health factors- current weight, smoking, alcohol, receipt of metronidazole since last study visit. Hygienic factors- douching, power, towelette, genital deodorant spray, shower versus bath.