Table 1

Characteristics of lung cancer patients and control subjects

CaseControl
Total (n)370380
GenderMaleMale
Age (yr)
 <4050
 40–49460
 50–59140259
 60–6917988
 ≥70033
Pack/day × yr
 <5004650
 500–1000153199
 1000–2000138121
 2000–3000308
 3000–400022
 ≥400010
Histological cell type
 Small cell carcinoma44
 Squamous cell carcinoma105
 Adenocarcinoma193
 Others28