Table 1

Characteristics of study subjectsa

ParameterLung cancer (n = 141)Noncancer (n = 60)P
Age (yr ± SE)63.02 ± 9.6149.95 ± 15.14<0.001
Gender
 Female45 (31.9)b11 (18.3)
 Male96 (68.1)49 (81.7)0.059
Smoking status
 Nonsmoking78 (55.3)48 (80.0)
 Smoking63 (44.7)12 (20.0)0.001
Tumor type
 Adenocarcinoma83 (58.9)
 Squamous cell carcinoma58 (41.1)
Tumor stage
 I46 (32.6)
 II42 (29.8)
 III53 (37.6)
  • a The difference of age between lung cancer and non-cancer cancer patients was calculated by the Wilcoxon rank sums test. The other status differences between lung cancer and non-cancer cancer patients were calculated by the χ2 test.

  • b Numbers in parentheses are percentages.