Table 1. Clinical Characteristics of Never Smokers With Lung Adenocarcinomas.

		Sex
Characteristics	Total	Male	Female	P
No. of patients	202	43	159
Age, years	57.3	59.9	56.6	.061
SD	10.1	11	9.8
Clinical Stage
I	113	18	95	.058
II	21	7	14
III	62	15	47
IV	6	3	3
Differentiation
Well	38	8	30	.160
Moderate	111	19	92
Poor	53	16	37