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Table 1 Matching of lung cancer and control subjects

From: The effect of metformin and thiazolidinedione use on lung cancer in diabetics

   Lung cancer (507) Control (507) P-value
Age As of 1/1/1990 56.2 (49.1, 61.6) 56.6 (49.7, 62.0) 0.39
Gender Female 38.9% 38.9% >0.99
  Male 61.1% 61.1%  
Tobacco Use Current 14.0% 14.2% 0.011
  Former 73.6% 75.3%  
  Never 10.3% 10.5%  
  Unknown 2.2% 0%  
Pack-years   40 (25, 45) 35 (25, 45) 0.13
BMI   28.7 (25.1, 33.4) 30.6 (26.8, 35.5) <0.001
HbA1c   7.0 (6.3, 7.8) 7.2 (6.5, 7.8) 0.17
  1. Age, pack-years, BMI, and HbA1C are listed as medians (25th, 75th percentiles). Age is listed as of 1/1/1990 for comparison purposes since matching was based on date of birth.
  2. All subjects with known diabetes mellitus.