Table 3 Reproductive characteristics of Saudi breast cancer cases and controls
From: Obesity is a significant risk factor for breast cancer in Arab women
Parameter | Cases number (%) | Controls number (%) | OR 95% confidence intervals | P-values |
|---|---|---|---|---|
Menopausal Status | Â | Â | Â | < 0.0001 |
  Pre-menopause | 264 (49.7) | 484 (76.5) | 1 | |
  Postmenopausal | 267 (50.3) | 149 (23.5) | 3.29 (2.56 – 4.22) | |
Age at menarche (years) | Â | Â | Â | 0.0767 |
  < 13 | 379 (70.9) | 422 (66.1) | 1 | |
  ≥ 13 | 155 (29.1) | 216 (33.9) | 0.80 (0.62 – 1.03) | |
Breastfeeding | Â | Â | Â | 0.8739 |
  No | 38 (8.0) | 38 (8.0) | 1 | |
  Yes | 440 (92.1) | 457 (92.0) | 0.96 (0.60 – 1.54) | |
Use of hormonal replacement therapy | Â | Â | Â | < 0.0001 |
  No | 191 (35.9) | 329 (52.3) | 1 | |
  Yes | 341 (64.1) | 300 (47.7) | 1.96 (1.55 – 2.48) | |
Age at menopause (years) | Â | Â | Â | 0.0001 |
  < 45 | 67 (30.0) | 7 (8.0) | 1 | |
  ≥ 45 | 156 (70.0) | 81 (92) | 0.20 (0.09 – 0.46) |