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Table 3 Relative risk (RR) with 95% confidence intervals (CI) for pregnancy-related pelvic pain in the second and third pregnancies according to history of previous pregnancy (ies)

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

Characteristic Pregnancy-related pelvic pain in second pregnancy Pregnancy-related pelvic pain in third pregnancy
  RR (95% CI)* RR (95% CI)**
Pregnancy-related pelvic pain in first pregnancy   
   No 1.0 (ref.) -
   Yes 57.3 (40.5–81.2) -
Pregnancy-related pelvic pain in at least one of the first two pregnancies   
   No - 1.0 (ref.)
   Yes - 31.2 (19.7–49.4)
Not suffered from Pregnancy-related pelvic pain in the previous two pregnancies   1.0 (ref)
Pregnancy-related pelvic pain -  
   in the first but not in the second pregnancy - 1.4 (0.5–4.0)
   not in the first but in the second pregnancy - 18.0 (8.2–39.6)
   both in the first and the second pregnancy - 232 (82–659)
  1. * Adjusted for use of hormonal contraceptives, age at second birth, weight of newborn and time since second birth (years between second birth and enrolment in the study cohort). Analysis includes women with valid information for listed variables, i.e., 467 women with and 1221 women without pregnancy-related pelvic pain in second pregnancy. ** Adjusted for use of hormonal contraceptives, age at third birth, weight newborn and time since third birth (years between third birth and enrolment in the study cohort). Analysis includes women with valid information for listed variables, altogether 233 women with and 449 women without pregnancy-related pelvic pain during their second pregnancy.