Table 4.

Health-related quality of life at Wave 1 and Wave 2 among individuals with SUD with and without GAD

SF-12 scores	GAD-SUD						SUD only						Comparison of Groups and Group × Time Interaction
	N=286; Total %=39.07				Time difference comparison		N=5730; Total %=65.06				Time difference comparison		Group		Group × time interaction
	Mean Wave 1	SE	Mean Wave 2	SE	Paired T-test	P	Mean Wave 1	SE	Mean Wave 2	SE	Paired T-test	P	Beta	P-value	Beta	P-value
PCS	46.80	1.08	45.38	1.08	−1.63	0.1049	50.89	0.18	50.35	0.21	−3.36	0.0008	−4.09	0.0004	−0.89	0.3265
General health	41.03	1.13	42.60	1.07	1.98	0.0485	49.55	0.22	48.90	0.22	−3.80	0.0001	−8.53	<0.0001	2.23	0.0081
Physical functioning	45.78	1.04	45.20	1.04	−0.64	0.5212	51.82	0.16	50.98	0.18	−5.33	<0.0001	−6.04	<0.0001	0.26	0.7782
Role-physical	45.09	0.95	43.23	0.98	−2.14	0.0331	51.24	0.17	49.78	0.19	−8.26	<0.0001	−6.15	<0.0001	−0.40	0.6597
Bodily pain	42.06	1.00	42.65	1.12	0.51	0.6099	49.31	0.21	49.91	0.22	2.73	0.0064	−7.24	<0.0001	−0.02	0.9845
MCS	37.04	1.02	40.42	0.94	3.02	0.0028	50.49	0.16	49.66	0.18	−4.59	<0.0001	−13.45	<0.0001	4.21	0.0005
Social functioning	39.13	1.12	42.04	1.06	2.30	0.0223	50.99	0.17	50.54	0.19	−2.45	0.0143	−11.87	<0.0001	3.36	0.0108
Role-emotional	38.07	1.14	39.21	0.98	0.92	0.3563	50.36	0.17	48.34	0.19	−10.04	<0.0001	−12.29	<0.0001	3.15	0.0142
Mental health	37.14	0.90	41.04	0.95	4.08	0.0001	49.89	0.17	50.17	0.20	1.31	0.1898	−12.75	<0.0001	3.63	0.0005