Table 2. Estimated Revenue, Cost, and Profit in Dollars for Short-Stay Episodes,¹ by Payment Regions.

Payment Region	Payment Values
	Average	Standard Deviation	Minimum	Maximum
Total
Revenue	2,343	953	418	9,846
Cost	2,343	1,634	180	9,846
Profit	0	1,223	−4,440	4,320
Length of Stay	25.6	18.8	2	2100
n = 79,3373
Payment Regions
Episodes Less than B:
Revenue	2,246	709	418	4,555
Cost	1,346	775	180	4,475
Profit	899	662	2	4,320
Length of Stay	13.9	8.5	2	44
n = 41,534
Episodes Longer Than B but Less Than T:
Revenue	2,207	733	418	4,555
Cost	3,092	1,260	446	7,621
Profit	−885	818	−4,261	−1
Length of Stay	34.2	13.6	5	74
n = 33,852
Episodes Longer Than T:
Revenue	4,535	1,809	1,019	9,846
Cost	6,411	1,378	3,201	9,846
Profit	−1,876	976	−4,440	0
Length of Stay	75.3	13.0	32	2100
n = 3,951

¹< = 100 days.

²Stability point for most of the psychiatric patient classifications.

³Number of psychiatric discharges with non-chronic stays.

NOTES: B is break even point; T is trim point.

SOURCE: Fries, B.E., and Durance, P.W., University of Michigan, Nerenz, D.R., Henry Ford Health System, Ashcraft, M.L.F., University of Washington, 1993.