Table 1.

Baseline demographic characteristics of the study population between 2008 and 2014 by hospital admission category

Characteristic	No (%)
	All cause	Cardiovascular	Respiratory
	n=351 294	n=262 385	n=247 829
Age (year), mean (SD)	64.69 (14.70)	65.58 (14.53)	65.61 (14.48)
Male sex (%)	190 716 (54.3)	140 206 (53.4)	132 288 (53.4)
Race
White	209 921 (59.8)	155 405 (59.2)	147 204 (59.4)
Black	122 943 (35.0)	93 325 (35.6)	87 831 (35.4)
Other	18 430 (5.2)	13 655 (5.2)	12 794 (5.2)
Smoking status at initiation (no)	330 837 (94.2)	246 634 (94.0)	232 396 (93.8)