Table 1.

Patient Demographics at Baseline

	PAI	PIT	CAH
Matched pairs	N = 1014	N = 8818	N = 551
Age, y
Mean	50.8	48.0	31.9
Standard deviation	17.2	16.0	18.3
Sex, %
Male	35.6	40.8	32.1
Female	64.4	59.3	67.9
Insurance coverage, %
Commercial	81.0	87.7	97.3
Medicare	19.0	12.3	2.7
Region, %
Northeast	12.3	14.6	15.4
Northcentral	31.0	25.7	22.5
South	33.8	43.3	43.6
West	22.4	15.3	17.6
Unknown	0.5	1.0	0.9

Adapted with permission from [9].