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Table 2 Categorical predictors of breast cancer among premenopausal women in Nigeria, 1998–2000

From: Waist–hip ratio and breast cancer risk in urbanized Nigerian women

Predictor Cases Controls Odds ratio 95% confidence interval P value
Waist–hip ratio      
   ≤ 0.77 37 (30.8) 64 (35.6) 1.00   
   >0.77 to ≤ 0.85 45 (37.5) 78 (43.3) 0.88 0.50–1.55 0.65
   >0.85 38 (31.67) 38 (21.2) 1.41 0.80–2.78 0.22
Family history of breast cancer      
   Yes 11 (9.17) 14 (7.78) 1.37 0.58–3.22 0.48
   No 109 (90.83) 166 (92.22)    
Obesity (body mass index ≥ 30)      
   Yes 29 (24.17) 25 (13.89) 1.52 0.82–2.82 0.18
   No 91 (75.83) 155 (86.11)    
Having ever breastfed      
   Yes 102 (85.71) 133 (73.89) 1.04 0.50–2.18 0.91
   No 17 (14.29) 47 (26.11)    
Use of contraceptive pill      
   Yes 53 (45.30) 62 (34.44) 0.84 0.51–1.39 0.50
   No 64 (54.70) 118 (65.56)    
Social status      
   Low 54 (46.15) 98 (54. 75) 1.00   0.15
   Middle 60 (51.28) 80 (44.69) 1.36 0.85–2.18  
   High 3 (2.56) 1 (0.56) 5.44 0.55–53.62  
  1. Data presented as number (%), age-adjusted odds ratio, 95% confidence interval, and P value for cases and controls.