Table 2 Odds ratio (OR) with 95% confidence intervals (CI) for pregnancy-related pelvic pain in the first pregnancy
Characteristic | Pregnancy-related pelvic pain in first pregnancy |
|---|---|
OR (95% CI) * | |
Use of hormonal contraceptives before first birth | |
No | 1.0 (ref.) |
Yes | 1.6 (1.2–2.1) |
Age at menarche | |
<= 12 years | 1.0 (ref.) |
13 years | 0.9 (0.7–1.2) |
14 + years | 0.8 (0.6–1.1) |
Age at first birth | |
< = 20 years | 1.0 (ref.) |
21–25 years | 1.2 (0.9–1.5) |
26 + years | 0.8 (0.5–1.1) |
Time elapsed since first birth (per 3 years)** | 0.9 (0.8–1.0) |
Weight of newborn child (per 500 g) | 1.0 (0.95–1.1) |
Years of education | |
7–9 | 1.0 (ref.) |
10–12 | 1.0 (0.7–1.3) |
13–15 | 0.9 (0.7–1.3) |
16+ | 1.1 (0.7–1.7) |
Smoking during first pregnancy | |
No | 1.0 (ref.) |
Yes | 0.9 (0.7–1.1) |