Table 1.

Sample Characteristics

	Smoking Status
	Never Smokers	Former Smokers	Continuing Smokers
N	489	381	342
Mean age at index date (SD)	43.5 (11.4)*	47.3 (12.3)@	42.4 (10.5)
Percent male	37.1&,$	43.0@	48.8
Mean years smoked (SD)	N/A	26.0 (13.9)@@	25.3 (10.3)
Percent heavy smoker#	N/A	29.1%@	15.5%
Mean Chronic Disease Score## (SD)	.89 (.82)	1.38 (1.3)@	1.1 (2.3)

^*Difference between Never and Former Smokers significant at p<.01.

^@Difference between Continuing and Former Smokers significant at p<.01.

^&Difference between Never and Continuing Smokers significant at p<.01.

^$Difference between Never and Former Smokers significant at p<.05.

^@@Difference between Continuing and Former Smokers significant at p<.05.

^#Heavy smoker: Average of one or more packs of cigarettes a day when smoking.

^##Chronic Disease Score [Clark et al. 1995]: Pharmacy-based comorbidity/health status measure.