Comparing and Predicting the Costs and Outcomes of Patients with Major and Minor Stroke Using the Boston Acute Stroke Imaging Scale Neuroimaging Classification System

Article Figures & Data

Download figure
Open in new tab
Download powerpoint
Fig 1.
The distribution of the in-hospital costs in 2000 and 2005 for patients with major and minor strokes. Costs are indexed to the mean cost of minor stroke in 2000.
Download figure
Open in new tab
Download powerpoint
Fig 2.
The in-hospital costs in 2000 (A) and 2005 (B) for patients with (red) and without (light blue) proximal artery occlusion. In-hospital deaths were removed. Costs are indexed to the mean cost of minor stroke in 2000.

Table 1:

Patient characteristics classified as a major or minor stroke by year, comparing across stroke classification and year

	2000			2005			P^†
	Major	Minor	P^*	Major	Minor	P^*	P^†
No.	59	171		86	164
% Female	40.68	46.2		50	43.9		.8974
Mean age (yr)	66.71	69.46	.1846	73.91	68.45	.0029
Median comorbidity	3	1	<.0001	3	2	<.0001
Length of stay (days)	12.58	3.16	<.0001	7.67	3.40	<.0001
Total cost of hospitalization^‡	4.36	1.00	<.0001	3.00	1.08	<.0001
Total cost of hospitalization^‡ (excluding in-hospital deaths)	4.46	1.00	<.0001	3.21	1.08	<.0001
ICU use
Mean ICU days	3.71	0.09	<.0001	2.47	0.23	<.0001
Mean ICU costs^‡	2.19	0.05	<.0001	1.45	0.12	<.0001
% who spent any time in the ICU	66.1	2.9	<.0001	62.8	9.1	<.0001
Among patients who spent any time in the ICU
Mean ICU days	5.62	3.20		3.93	2.47		.0921
Mean ICU costs^‡	3.31	1.70		2.31	1.26		.0378
Imaging use
No. of CT scans	3.76	1.13		4.41	1.89		<.0001
No. of MRIs	1.83	1.87		2.13	2.48		.135
Mean cost of CT^‡	0.12	0.03		0.14	0.07		<.0001
Mean cost of MRI^‡	0.19	0.15		0.16	0.15		.0096
Patient outcomes (%)
Deceased	13.56	0		30.23	0		<.0001
Discharge to home	18.64	76.61		8.14	70.12		<.0001
Discharge to rehabilitation facility	59.32	17.54		15.12	6.71		<.0001
Discharge to facility	1.69	2.92		45.35	22.56		.0007

Note:—MRI indicates MR imaging; ICU, intensive care unit.
* P values from least-squares means.
† P value for interaction with year was ≤.05; therefore, data from each year were combined for statistical analysis.
‡ Costs are in US dollars and indexed to the mean cost of a minor stroke in 2000.

Table 2:

Multiple regression analysis and total hospital cost indexed to the cost of total hospitalization of a patient with minor stroke in 2000

Variable	Parameter Estimate	Standard Error	t Value	P
Intercept	3.783	0.395	9.56	<.0001
Minor stroke	−3.346	0.272	−12.31	<.0001
≥1 Charlson comorbidity score	0.669	0.321	2.08	.0376
Deceased	−0.698	0.348	−2.01	.0453
Year^*	−1.236	0.300	−4.12	<.0001
Year × minor stroke	1.238	0.357	3.47	.0006