Table 1.

Baseline Characteristics of the Study Population (N = 255)

	Males (N = 173) N (%)	Females (N = 87) N (%)	P Value
Current smokers	33(19)	23(26)	0.21
Past smokers	31(18)	13(15)	0.49
Diabetes mellitus	4(2)	2(2)	0.99
Hypertension	7(4)	2(2)	0.536
Dyslipidemia	7(8)	7(8)	0.945
Ischemic heart disease	0	0	1
Prior stroke	2(1)	2(2)	0.31
Prior myocardial infarction	0	0	1
Asthma/COPD	7(4)	2(2)	0.324

COPD = chronic obstructive pulmonary disease.