Table 1.

Demographic characteristics of the study population

VariableCases (n = 139)Controls (n = 130)P*
Age, mean (SE), y58.4 (0.41)60.9 (0.32)<0.001
Sex, n (%)
    Men97 (69.8)93 (71.5)
    Women42 (30.2)37 (28.5)0.75
Family history of cancer, n (%)
    No106 (76.3)101 (77.7)
    Yes33 (23.7)29 (22.3)0.78
History of alcohol use, n (%)
    Yes91 (65.5)65 (50.0)
    No47 (34.5)59 (45.4)0.003
Cigarette smoking, mean (SE)
    No. years smoked42.1 (0.5)37.7 (9.6)<0.001
    No. cigarettes smoked per day30.2 (1.38)29.2 (1.21)0.651
  • NOTE: All study subjects were self-reported Caucasians and current smokers.

  • * P values were derived from the χ2 test for categorical variables and Student's t test for continuous variables. All P values are two-sided.