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Table 4 Factors independently associated with Saudi breast cancer women - multiple logistic regression

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

Parameters All Pre-menopausal Post-menopause
  OR (95% CI)   
BMI, kg/m2    
  Lean, (18.5 – 24.9) 1 1 1
  Overweight/Obese (≥25) 2.29 (1.68 – 3.13) 2.73 (1.79 – 4.18) 2.22 (1.32 – 3.72)
Family history of breast cancer    -
  No 1 1  
  Yes 2.31(1.60 – 3.32) 5.04 (3.09 – 8.21)  
Age at menarche (years)   - -
  < 13 1   
  ≥ 13 1.30 (0.99 – 1.72)   
Use of HRT    
  No 1 1 1
  Yes 2.25 (1.65 – 3.08) 1.73 (1.13 – 2.67) 2.45 (1.53 – 3.92)
Menopausal Status   - -
  Pre-menopause 1   
  Post-menopause 1.72 (1.25 – 2.38)   
Breastfeeding    
  No 1   1
  Yes 0.53 (0.34 – 0.84)   0.20 (0.08 – 0.50)
Education Level    
  Illiterate 1 1 1
  Primary/High School 0.40 (0.28 – 0.58) 0.11 (0.06 – 0.27) 0.73 (0.44 – 1.20)
  Higher education 0.11 (0.07 – 0.17) 0.03 (0.01 – 0.07) 0.21 (0.10 – 0.45)
  1. Model adjusted for age (≤35 years vs. >35 years), BMI (lean, overweight/obese), marital status (single, ever-married), menopause status (pre-menopause, post-menopause), HRT use (yes/no), age at menarche (<13 years vs. ≥13 years), breastfeeding (yes/no), and education levels (illiterate, primary/high school, higher education). All variables in the model are categorical.
  2. Abbreviations: OR odds ratio, CI confidence interval, BMI body mass index.