Skip to main content

Table 2 Odds ratio (OR) with 95% confidence intervals (CI) for pregnancy-related pelvic pain in the first pregnancy

From: Use of hormonal contraceptives and occurrence of pregnancy-related pelvic pain: a prospective cohort study in Norway

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)
  1. * All variables are mutually adjusted. Analysis includes women with valid information for listed variables, i.e. 437 women with and 1424 women without pregnancy-related pelvic pain during their first pregnancy. ** Years between first birth and enrolment in the study cohort.