Variables	Frequency Distribution	Subjects		Controls
Variables	Frequency Distribution	Frequency N (%)	Range	Frequency N (%)	Range
Age (Years)	18 - 30	78 (41.6%)	18 - 58	26 (32.5%)	19 - 58
	31 - 40	49 (25.8%)		24 (30.0%)
	41 - 50	42 (22.1%)		19 (23.8%)
	51 - 60	21 (11.1%)		11 (13.7%)
Sex	Male	151(79.5%)		58 (72.5%)
	Female	39 (20.5%)		22 (27.5%)
DOC (Years)			2 - 48		2 - 30
Smoking/Intake (Pack years)	Smokers	9 (4.7%)	0 - 15	3 (3.7%)	0 - 10
	Non Smokers	181 (95.3%)		77 (96.3%)