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Table 1 Baseline characteristics of the study participants

From: Association between dietary fat and fat subtypes with the risk of breast cancer in an Iranian population: a case-control study

  Case
(n = 473)
Control
(n = 501)
p-value
Age (years) 45.8 ± 10.3 43.9 ± 11.2 0.002
BMI (kg/m2) 28.0 ± 5.1 28.8 ± 6.0 0.01
Physical activity (MET-h/week) 22.7 ± 40.2 29.4 ± 43.9 0.006
Age at menarche (years) 13.0 ± 2.5 12.9 ± 2.7 0.28
Menopausal status (%)    
Premenopausal 309 (66.1) 326 (66.4) 0.94
Postmenopausal 158 (33.8) 165 (33.6)  
Educational level (%)    
Un university 394 (84.3) 411 (84.0) 0.89
University 73 (15.6) 78 (15.9)  
Marital status (%)    
Married 437 (93.7) 462 (94.2) 0.74
Unmarried/divorced/widowed 29 (6.2) 28 (5.7)  
Family history of breast cancer (%) 46 (9.8) 7 (1.4) < 0.001
Oral contraceptive use (%) 244 (53.0) 259 (61.2) 0.01
Current smoker (%) 18 (3.8) 25 (5.1) 0.34
Alcohol use (%) 12 (2.5) 30 (5.9) 0.008
Postmenopausal hormone use (%) 2 (0.42) 10 (2.00) 0.02
Parity    
Nulliparous/missing 210 (44.1) 215 (42.9) 0.90
1 42 (8.8) 51 (10.1)  
2–3 149 (31.3) 155 (30.9)  
≥ 4 75 (15.7) 80 (15.9)  
  1. χ2 Test for ordinal qualitative variables and t-test for continuous variables
  2. Abbreviation: BMI, Body mass index