Table 2.

Comparison of demographic features between patients with malignant and non-malignant lesions. Information on smoking status (cigarettes per day and years smoking) and age in different types of vascular classification is also provided

Basic Characteristics
	Total	Patients with malignant lesions	Patients with non-malignant lesions
Total number of subjects	79	21	58
Bilateral lesions	27	8	19
Sex	58 males, 21 females	17 males, 4 females	41 males, 17 females	P = 0.362
Age (years), mean ± SD	57.5 ± 7.12	60.5 ± 6.04	53.7 ± 6.65	P = 0.001
Cigarette/day, mdn (IQR)	17 (23–12)	24(28–18)	13 (18–12)	P = 0.001
Years smoking, mdn (IQR)	30.1 (37–25)	32 (35–28)	34 (37–25)	P = 0.472