No history of drug use		History of Drug Use
	Ex- Tobacco Smokers	Active Tobacco Smokers	Ex- Tobacco Smokers	Active Tobacco Smokers
Average Age (yrs)	71.3	68.4	57.3	53.1
Number of Admissions	607	507	42	210
Home oxygen (%)	100 (22)	13 (22)	20 (48)	39 (19)
Spirometry (%)	242 (40)	247 (49)	20(48)	98 (46)