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. 1979 Summer;1(1):79–107.

Patient Origin Matrix.

(1) (2) (3) (4)
(3)÷(2)
(5) (6)
(4)×(5)
Residence of beneficiary Total Discharges Discharges from hospitals in PSRO 1 Proportion of total discharges from hospitals in PSRO 1 Medicare enrollment Enrollment allocated to PSRO 1
PSRO 1 32,500 30,000 .92 75,000 69,000
PSRO 2 13,000 6,000 .46 30,000 13,800
PSRO 3 25,700 5,000 .19 30,000 5,700
PSRO 4 30,250 4,000 .13 50,000 6,500

Total 101,450 45,000 185,000 95,000