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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     < 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)     0.0767
  < 13 379 (70.9) 422 (66.1) 1
  ≥ 13 155 (29.1) 216 (33.9) 0.80 (0.62 – 1.03)
Breastfeeding     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     < 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)     0.0001
  < 45 67 (30.0) 7 (8.0) 1
  ≥ 45 156 (70.0) 81 (92) 0.20 (0.09 – 0.46)
  1. Median values were used as cutoff point for age at menopause and age at menarche.
  2. Abbreviation: OR odds ratio.
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