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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)