title: Pregnancy-related pelvic pain is more frequent in women with increased body mass index.
abstract: OBJECTIVE
  To investigate the association between pre-pregnancy overweight/obesity and pregnancy-related pelvic pain.
  
  
  METHODS
  Nested case-control study.
  
  
  METHODS
  The Danish National Birth Cohort, a cohort of pregnant women and their children recruited 1996-2002.
  
  
  METHODS
  The women were interviewed twice during pregnancy and twice after childbirth. The first pregnancy interview provided information on self-reported pre-pregnancy body mass index (BMI) and possible confounders, while data on pregnancy-related pelvic pain came from an interview six months postpartum. Cases (n=2 271) were selected on the basis of self-reported pelvic pain, and controls were randomly selected among women who did not report pelvic pain (n=2 649). We used logistic regression analysis to calculate pregnancy-related pelvic pain odds ratios (OR (95% confidence intervals)) according to pre-pregnant BMI.
  
  
  METHODS
  Self-reported pregnancy-related pelvic pain. Results. In the total cohort, 18.5% of all pregnant women reported pregnancy-related pelvic pain. In the nested case-control study, the adjusted ORs for overall pelvic pain were 0.9 (0.7-1.2) in underweight women, 1.2 (1.1-1.4) in overweight women, 1.5 (1.2-2.0) in obese women Class 1 (30≤BMI<35), and 1.9 (1.3-2.8) in obese women Class 2 + 3 (BMI≥35), all relative to normal weight women. The correspondent ORs for severe pelvic pain were 0.8 (0.6-1.2), 1.4 (1.2-1.7), 1.7 (1.3-2.2), and 2.3 (1.6-3.4). The associations were stronger among women who had not given birth before.
  
  
  CONCLUSIONS
  The risk of pregnancy-related pelvic pain increased with pre-pregnancy BMI in an exposure-response relation and potentially adds another maternal complication to obesity.
authors: Department of Occupational Medicine, Herning Regional Hospital, Herning, Denmark. karin.biering@vest.rm.dk
authors: Karin
authors: K
authors: Biering
authors: Ellen Aagaard
authors: EA
authors: Nøhr
authors: Jørn
authors: J
authors: Olsen
authors: Anne-Marie Nybo
authors: AM
authors: Andersen
authors: Niels Henrik
authors: NH
authors: Hjøllund
authors: Mette
authors: M
authors: Juhl
mesh_terms: D017677:Age Distribution; D015992:Body Mass Index; D016022:Case-Control Studies; D003718:Denmark; D005260:Female; D005500:Follow-Up Studies; D005865:Gestational Age; D006801:Humans; D015994:Incidence; D016015:Logistic Models; D016017:Odds Ratio; D050177:Overweight / Q000175:diagnosis / Q000453:epidemiology*; D010147:Pain Measurement; D010298:Parity; D017699:Pelvic Pain / Q000175:diagnosis / Q000453:epidemiology*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000453:epidemiology*; D011256:Pregnancy Outcome; D011295:Prenatal Care; D012016:Reference Values; D018570:Risk Assessment; D011795:Surveys and Questionnaires; D055815:Young Adult