Table 1

Distribution of select characteristics of lung cancer patients and cancer-free controls (frequency-matched former smokers)

VariableCases (n = 470)Controls (n = 472)Pa
No.%No.%
Sex
 Male27257.929161.70.237
 Female19842.118138.3
Ethnicity
 Non-Hispanic whites37980.738982.40.698
 Blacks 5812.3 5010.6
 Hispanics 33 7.0 33 7.0
Lung cancer history in first-degree relatives
 Yes10121.5 6112.9<0.001
 No36978.541187.1
Mean ± SDMean ± SD
Age (years)62.29 ± 9.1561.96 ± 9.750.593
Body mass index (Kg/m2)26.44 ± 5.1128.05 ± 4.41<0.001
Pack-years smoked48.07 ± 32.7441.74 ± 30.530.002
Alcohol intake (g/day)9.62 ± 23.5510.20 ± 18.850.676
Total energy intake (kcal/day)1989.23 ± 669.342018.91 ± 646.200.489
Protein intake (g/day)72.48 ± 24.7474.47 ± 24.530.216
Total fat intake (g/day)86.71 ± 34.5884.34 ± 33.550.285
Carbohydrate intake (g/day)227.88 ± 79.71237.25 ± 77.570.068
  • a Two-sided χ2 test or Student t test.