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Table 2 Socio-demographical characteristics of the Saudi breast cancer cases and controls

From: Obesity is a significant risk factor for breast cancer in Arab women

Socio-demographic characteristics Cases number (%) Control number (%) OR 95% confidence intervals P-value
Age, years     < 0.0001
  ≤ 35 80 (15.0) 201 (31.5) 1
  > 35 454 (85.0) 437 (68.5) 2.61 (1.95 – 3.49)
Family History of Breast Cancer 117 (21.9) 72 (11.4) 2.18 (1.58 – 2.99) < 0.0001
Family History of Cancer 221 (41.4) 262 (41.3) 1.01 (0.80 – 1.27) 0.9653
Education Level     < 0.0001
  Illiterate-no schooling 183 (36.7) 76 (12.1) 1
  1 – 12 years 254 (50.9) 264 (41.9) 0.40 (0.29 – 0.55)
  > 12 years 62 (12.4) 290 (46.0) 0.09 (0.06 – 0.13)
Ever Married (no) 23 (4.3) 100 (15.7) 0.24 (0.15 – 0.39) < 0.0001
Never Worked 368 (74.2) 263 (42.2) 3.94 (3.05 – 5.09) < 0.0001
Ever Smoke (yes) 158 (29.8) 181 (28.8) 1.05 (0.82 – 1.36) 0.6995
BMI, kg/m2
All     < 0.0001
  Lean 129 (24.2) 247 (38.7) 1
  Overweight 157 (29.4) 193 (30.3) 1.56 (1.15 – 2.10)
  Obese 248 (46.4) 198 (31.0) 2.40 (1.81 – 3.18)
Pre-Menopause     < 0.0001
  Lean 67 (25.4) 201 (41.5) 1
  Overweight 86 (32.6) 148 (30.6) 1.74 (1.19 – 2.56)
  Obese 111 (42.1) 135 (27.9) 2.47 (1.70 – 3.58)
Post-Menopause     0.1191
  Lean 60 (22.5) 45 (30.2) 1
  Overweight 70 (26.2) 42 (28.2) 1.25 (0.73 – 2.15)
  Obese 137 (51.3) 62 (41.6) 1.66 (1.02 – 2.70)
  1. Abbreviations: OR odds ratio, BMI body mass index.
  2. Lean: BMI (18.5 - 24.9); Overweight: BMI (25 - 29.9); Obese: BMI (≥30).