Table 1.

Patient population at baseline

	Test group (N = 18)	Control group (N = 19)	Significance (p)
Mean age (years)	53.3 ± 9.8	48.5 ± 6.5	0.43*
Range age (years)	40–67	36–63
Gender (M/F)	6/12	10/9	0.19**
Smokers (N/%)	4; 22.2	4; 21.1	0.62**

M, male; F, female; N, number of patients

*Based on unpaired t-test

**Based on chi-square test