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

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)