1.

病例组与对照组的基本情况

Demographics of lung cancer patients and healthy controls

	Cases (%)	Controls (%)	P
*Statistically significant.
Female	363	370
Age (yr)	55.79±11.79	56.46±12.06	0.448
Education			0.799
Never	34 (9.4)	32 (8.6)
Elementary school	171 (47.1)	188 (50.8)
Junior school	108 (29.8)	102 (27.6)
Senior school and upwards	50 (13.8)	48 (13.0)
Histology
Adenocarcinoma	248 (68.3)	-	-
Squamous cell carcinoma	58 (16.0)	-	-
Other types	57 (15.7)	-	-
Exposure to cooking oil fumes			< 0.001*
Yes	136 (37.5)	92 (24.9)
No	227 (62.5)	278 (75.1)
History of tuberculosis			0.022*
Yes	41 (11.3)	24 (6.5)
No	322 (88.7)	346 (93.5)