Table 4. Comparison of the gender, nodule size and CT findings between patients with benign or malignant lesions.

	Malignant pulmonary nodules	Benign pulmonary nodules	P
Gender			0.193
Men	61	30
Women	66	21
Lobulation			0.014*
Yes	98	30
None	29	21
Rim			0.410^a
Clear	123	48
Ambiguous	4	3
Spiculated			<0.001
Yes	106	23
None	21	28
Air cavity density			0.031*
Yes	65	17
None	62	34
Calcification			0.410 ^a
Yes	4	3
None	123	48
Pleural indentation			0.101
Yes	72	22
None	55	29
Satellite lesions			0.008*^,a
Yes	1	5
None	126	46
Vascular aggregation			<0.001
Yes	83	11
None	44	40

*, P<0.05; ^a, Fisher’s exact test. CT, computed tomography.