Table 3.

Means and Standard Deviations of Independent Variables

	OSA (N=2,367)		Medicaid (N=3,185)
	Pre-PBC (N=983)	Post-PBC (N=1,384)	Pre-PBC (N=1,191)	Post-PBC (N=1,994)
Demographic Characteristics
Income	396.6	436.3	400.4	440.7
	(539.3)	(643.3)	(446.4)	(453.4)
Age	31.3	31.9	31.7	32.2
	(10.4)	(9.5)	(10.4)	(10.5)
Female	.21	.19	.53	.52
	(.41)	(.39)	(.49)	(.49)
Homeless	.01	.03	.02	.01
	(.10)	(.17)	(.12)	(.11)
Urban	.64	.64	.67	.65
	(.48)	(.48)	(.47)	(.48)
Edu	11.4	11.6	10.8	10.8
	(2.1)	(1.9)	(2.2)	(2.2)
Married	.16	.14	.17	.18
	(.37)	(.35)	(.38)	(.38)
Legal	.57	.57	.34	.37
	(.49)	(.49)	(.48)	(.48)
Usage Characteristics
Psypbm	.09	.13	.24	.29
	(.29)	(.34)	(.43)	(.45)
IVuser	.07	.06	.07	.08
	(.26)	(.24)	(.26)	(.27)
Polyuser	.53	.58	.53	.58
	(.49)	(.49)	(.49)	(.49)
Use-age	14.9	14.9	14.8	14.5
	(4.7)	(5.1)	(5.4)	(5.5)
Pretx	1.2	1.5	1.4	1.7
	(1.4)	(1.5)	(1.5)	(1.6)

Notes: The standard deviations shown in parentheses.