Table 5.

β value and Actual Survival Percentage in the Derivation Data

β	cISS-cAGE+cSBP+cGCS+cRR/2 Survival (%)	cISS-cAGE+cSBP+cGCS Survival (%)	-cAGE+cSBP+cGCS+cRR/2 Survival (%)
-1	0.0	0.0	0.0
0	0.0	0.0	0.0
1	0.0	0.0	0.0
2	0.0	0.0	0.0
3	1.7	11.8	30.0
4	14.0	19.7	28.0
5	30.0	26.8	33.8
6	32.4	40.3	47.6
7	28.8	51.5	66.5
8	38.3	75.3	82.7
9	58.3	88.5	96.5
10	78.7	96.7	99.5
11	91.4	98.6
12	96.1	99.9
13	98.5
14	99.9

If only one variable cannot be obtained, then a zero value is given for the missing predictor variable in each equation.

Actual survivals just crossed 50% around the nearest integer value of β (7 or 9)

cAGE: coded value of age, cBP: coded value of systolic blood pressure, cGCS: coded value of the Glasgow Coma Scale score, cRR: coded value of respiratory rate, cISS: coded value of the Injury Severity Score