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Table 9 Infertility risk factors: Results of the bivariate and multivariate logistic regression analysis, Women Hospital-Hamad Medical Corporation, 2018

From: Risk profile of Qatari women treated for infertility in a tertiary hospital: a case-control study

Independent risk factors Crude Odd ratio
(cOR)
95% Confidence interval (CI) Adjusted Odd ratio (aOR) p-value 95% Confidence interval (CI)
Model I: Independent risk factors of infertilitya
Age of participants (> 35 y) 2.31 1.24–4.29 3.72 0.008* 1.41–9.83
Second hand smoking 1.78 1.18–2.70 2.44 0.008* 1.26–4.73
Steady weight gain since marriage 8.17 5.11–13.05 4.65 0.001* 2.43–8.91
Recent weight gain 9.08 5.62–14.69 4.87 0.001* 2.54–9.32
Menstrual cycle irregularity 6.43 3.44–12.04 4.20 0.031* 1.14–15.49
Sexually transmitted infections (STIs) suggestive symptoms:
 Lower abdominal/pelvic pain 10.82 3.95–19.67 3.46 0.002* 1.57–7.63
 Abnormal vaginal discharge 8.54 4.19–17.44 3.32 0.019* 1.22–9.03
 Dyspareunia 18.44 8.95–37.60 7.04 0.001* 2.76–17.95
Fallopian tube blockage 7.71 3.22–18.47 5.45 0.003* 1.75–16.95
Model II: Independent risk factors of secondary infertilityb
Time from last conception ≥ 5y 4.9 2.78–8.65 5.8 0.001* 3.28–10.21
History of stillbirth (once or more) 3.24 1.39–7.52 2.63 0.042* 1.04–6.67
Miscarriage (once or more) 1.94 1.18–3.17 2.11 0.008* 1.21–3.68
Post-partum / Post-abortal infection 3.84 1.42–10.42 3.75 0.016* 1.27–11.06
  1. * p < 0.05
  2. a Model I: X2 (12) = 264, p < 0.001, Nagelkerke R2 = 0.661
  3. b Model II: X2 (4) = 57.3, p < 0.001, Nagelkerke R2 = 0.233
  4. Model I included comparison between total cases (n = 136) and total controls (n = 272)
  5. Model II included comparison between secondary infertile women (n = 93) and only controls who reported previous conception (n = 230)