表 1.

病例组与对照组间临床资料比较

Comparison of clinical data between case group and control group

Variable	Control group（n=445）	Case group（n=270）	P
ADC: adenocarcinoma; SCC: squamous cell carcinoma; ASC: adenosquamous carcinoma; SCLC: small cell lung cancer. Data were calculated by Logistic regression with adjustment for age, gender and pathological type, where appropriate.
Age (yr)			< 0.001
≤60	338 (76.0%)	102 (37.8%)
> 60	107 (24.0%)	168 (62.2%)
Gender			0.039
Female	243 (54.6%)	126 (46.7%)
Male	202 (45.4%)	144 (53.3%)
Histological type
ADC		200 (74.1%)
SCC		46 (17.0%)
ASC		3 (1.1%)
SCLC		15 (5.6%)
Others		6 (2.2%)