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Table 1 Comparison of demographic and clinical factors among cases and controls

From: Rapid method for determination of DNA repair capacity in human peripheral blood lymphocytes amongst smokers

  Cases Controls  
   Current
Smokers
Former
Smokers
Non-
Smokers
P-value
  N = 30 N = 30 N = 30 N = 30  
Age (mean ± SE) 62.7 ± 0.57 63.5 ± 0.84 61.9 ± 0.69 58.6 ± 0.98 0.27
Gender: N (%)      
   Male 15(50.0) 20(66.7) 21(70.0) 20(66.7)  
   Female 15(50.0) 10(33.3) 9(30.0 10(33.3) 0.58
Ethnicity      
   Anglo 30(100.0) 29(96.7) 25(83.3) 30(100.0)  
   Non-Anglo 0(0.0) 1(3.3) 5(16.7) 0(0.0) 0.24
No. of Cigarettes/day Mean ± SE 29.2 ± 2.5 24.4 ± 1.75 35.0 ± 3.3 0.0 ± 0.0 <0.001
Years smoked Mean ± SE: 44.23 ± 1.39 42.70 ± 1.46 35.37 ± 1.58 0.0 ± 0.0 <0.001
Family History Cancer      
   N (%)      
   No 14(48.3) 15(60.0) 12(41.4) 15(50.0)  
   Yes 15(51.7) 10(40.0) 17(58.6) 15(50.0) 0.07
  1. P-values from Chi-square test for association (categorical) or ANOVA (continuous)