Table 1.

Demographic characteristics of lung cancer cases and controls

Cases (n = 1,802)Controls (n = 1,725)P
Age, mean60.3 ± 8.760.0 ± 9.40.34
Gender
 Male1,397 (77.5%)1,248 (72.4%)<0.001
 Female405 (22.5%)477 (27.7%)
Country
 Romania90 (5.0%)141 (8.2%)<0.001
 Hungary270 (15.0%)234 (13.6%)
 Poland608 (33.8%)634 (36.7%)
 Russia345 (19.2%)260 (15.1%)
 Slovakia290 (16.1%)153 (8.9%)
 Czech Republic199 (11.0%)303 (17.6%)
Tobacco pack-years34.9 ± 20.918.1 ± 20.1
Tobacco status<0.001
 Never smoker138 (7.7%)588 (34.1%)
 Ex-smoker ≥2 years359 (19.9%)484 (28.1%)<0.001
 Current smoker1,304 (72.4%)649 (37.6%)
Histology
 Adenocarcinoma408 (22.6%)
 Squamous766 (42.5%)
 Large cell45 (2.5%)
 Small cell278 (15.4%)
 Mixed66 (3.7%)