1.

肺癌组和对照组一般资料

Demographic characteristics of lung cancer cases and controls

	Case (n, %)	Control (n, %)	P
Total	265 (100%)	307 (100%)
Gender
Male	190 (71.7%)	218 (71.0%)	0.834
Female	75 (28.3%)	89 (29.0%)
Age
Mean±SD	60.39±9.58	60.38±10.05	0.987
< 60	121 (45.6%)	144 (46.9%)	0.803
≥60	144 (54.4%)	163 (53.1%)
Smoking status
Never	86 (32.4%)	166 (54.1%)	< 0.001
< 30 pack-year	44 (16.6%)	99 (32.2%)
≥30 pack-year	127 (47.9%)	41 (13.4%)
Missing	8 (3.0%)	1 (0.3%)
Histology
Squamous cell	120 (45.3%)
Adenocarcinoma	99 (37.3%)
Small cell carcinoma	23 (8.7%)
Others	23 (8.7%)