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Table 3 General analysis of the case and control groups

From: Correlation between ZBRK1/ZNF350 gene polymorphism and breast cancer

  Case group (N = 80) Control group (N = 240) P
BMI 23.02 ± 3.92 23.02 ± 3.65 0.963
Menarche age, yr 13.28 ± 1.59 12.98 ± 1.28 0.099
Age of first delivery, yr 27.25 ± 3.77 27.33 ± 3.24 0.864
Number of pregnancy
 0–1 34 (42.5) 98 (40.8)  
 ≥ 2 46 (57.5) 142 (59.2) 0.793
Family history of cancer
 Yes 18 (22.5) 24 (10.0)  
 No 62 (77.5) 216 (90.0) 0.006
  1. The χ2 test was used to compare counting data (expressed as n(%)) between the case and control groups, and the t-test was used to compare measurement data (represented by mean ± SD) between the case and control groups