Table 1.

Five-year cumulative cost savings with IVT and MT

		mRS distribution (%)		5-Year cumulative cost for 100 patients (USD)		Cost saving per patient (USD)
		Control	IVT/MT	Control	IVT/MT
IVT
	mRS
	0	12.4	17.2	664,367	921,542
	1	16.6	19.5	930,579	1,093,151
	2	13.1	11.5	1,426,485	1,252,258
	3	13.3	13.5	2,680,775	2,721,087
	4	14.5	9.9	4,048,226	2,763,961
	5	11.1	10.9	2,858,095	2,806,597
	6	19.0	17.5	548,454	505,155
	Total	100.0	100.0	13,156,981	12,063,751
Cost saving per patient (USD)
	DRG-based payment system					10,932
	FFS-based payment system					9,753
MT
	mRS
	0	5.0	10.0	267,890	535,780
	1	7.9	16.9	442,866	947,397
	2	13.6	19.1	1,480,931	2,079,837
	3	16.4	16.9	3,305,617	3,406,398
	4	24.7	15.6	6,895,944	4,355,333
	5	13.5	6.2	3,476,061	1,596,413
	6	18.9	15.3	545,567	441,650
	Total	100.0	100.0	16,414,876	13,362,808
Cost saving per patient (USD)
	DRG-based payment system					20,807
	FFS-based payment system					24,058

Five-year cumulative costs for 100 patients without including additional expense for IVT or MT were calculated by (each mRS proportion×100)×(5-year cumulative cost for each mRS level). Cost saving per patient was calculated by (5-year cumulative costs for 100 patients)/100–(additional expense for IVT or MT).

IVT, intravenous thrombolysis; MT, mechanical thrombectomy; mRS, modified Rankin Scale; USD, US dollar; DRG, diagnostic-related group; FFS, fee-for-service.