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Table 1 Demographic anthropometric and lifestyle characteristics of participants in case and control groups

From: Association between novel dietary and lifestyle inflammation indices with risk of breast cancer (BrCa): a case–control study

Variables Groups, mean (SD) P valuea
Case (n = 253) Control (n = 267)
Age, y 48.91(10.46) 47.13(10.08) 0.062
BMI b, kg/m2 29.61(4.55) 29.07(5.39) 0.222
Waist- circumference (cm) 101.15(96.39) 96.39(13.25)  < 0.001
Physical Activity (Met.h/wk) 33.18(6.11) 32.70(5.20) 0.336
Smoking (yes), n (%) 8 (3.2) 9 (3.4) 0.894
Marriage age, y 19.43(5.02) 18.98(4.48) 0.296
Age at first pregnancy, y 22.29(5.32) 20.35(4.19)  < 0.001
Child number 2.92(1.43) 2.54(1.59) 0.005
Abortion history (yes), n (%) (37.2)94 (29.2)78 0.049
Breast cancer family history (yes), n (%) (5.5)14 (4.5)12 0.594
Family history of cancer (yes), n (%) (26.9)68 (20.7)55 0.097
History of benign breast diseases (yes), n (%) (7.9)20 (5.3)14 0.224
Inflammatory disease history (yes), n (%) (12.6)32 (13.2)35 0.863
Vitamin D supplement (yes), n (%) (14.6)37 (24.3)65 0.005
Ever use of OCPc (yes), n (%) (49.8)126 (56)149 0.156
Anti-inflammatory drugs use (yes), n (%) (10.3)26 (17.7)47 0.015
CRPd (mg/dl) 1.87 (0.44) 1.02 (0.32) 0.008
Education, n (%) 0.518
Illiterate (11.6)29 (9)24  
Low education (46.6)116 (50.4)134  
Higher education (42)105 (40.6)108  
Exposure to sunlight during the day (min)
Less than 30 min (28.5)72 (36)96 0.215
60–30 min (32.4)82 (25.5)68  
120–60 min (17)43 (17.2)46  
More than 120 min (22.1)56 (21.3)57  
  1. a Obtained from ANOVA for continuous variables and Chi-square for Categorical variables; b BMI: body mass index; c OCP: oral contraceptive pills; dCRP: C-Reactive Protein