TABLE 3—

Site-Level Difference in Differences for Admissions of Patients to Nursing Home Care, Before and After Closure of Inpatient Psychiatric Units: Bed Supply and the Prevalence of Serious Mental Illness in Veterans Affairs Nursing Homes, 1999–2007

	No Closure (n = 90)				Closure (n = 20)				Difference in Differences
Outcome	% Before (A)	% After (B)	Change (C = B − A)	P	% Before (D)	% After (E)	Change (F = E − D)	P	Estimate (G = F − C)	95% CI	P
Admissions % SMI, 1 y	25.44	25.50	0.06	.919	28.41	28.34	−0.07	.942	−0.13	−2.39, 2.13	.91
Admissions % SMI, 2 y	24.78	24.77	−0.01	.991	27.97	29.44	1.47	.515	1.48	−3.20, 6.17	.535
Admissions from inpatient psychiatric unit, 1 y	1.53	1.34	−0.19	.115	1.99	3.27	1.28	.223	1.47	−0.60, 3.55	.165
Admissions from inpatient psychiatric unit, 2 y	0.20	1.46	−0.54	.175	2.48	3.29	0.81	.668	1.35	−2.42, 5.12	.484
Admissions with history of inpatient psychiatric treatment, 1 y	2.37	2.39	0.02	.925	3.57	3.91	0.35	.597	0.33	−1.00, 1.66	.628
Admissions with history of inpatient psychiatric treatment, 2 y	2.83	2.34	−0.49	.278	3.09	4.62	1.52	.178	2.01	−0.37, .40	.098

Note. CI = confidence interval; SMI = serious mental illness.