Two-Tiered Ambulance Dispatch and Redeployment considering Patient Severity Classification Errors

Table 4

ANOVA results of the risk level index.

Dependent variable: risk level index (RLI)
Source	DF	Sum of squares	Mean square	F value	Pr > F
Model	99	16158.86	163.22	402.25	<.0001
Error	9900	4017.07	0.41
Corrected total	9999	20175.93
R-square	Coeff var	Root MSE	RLI mean
0.801	15.592	0.637	4.085
Source	DF	Anova SS	Mean square	F value	Pr > F
ALS ratio	3	13722.50	4574.17	11272.90	<.0001
α	4	1257.75	314.44	774.93	<.0001
β	4	107.24	26.81	66.07	<.0001
ALS ratio × α	12	933.14	77.76	191.64	<.0001
ALS ratio × β	12	112.73	9.39	23.15	<.0001
α × β	16	10.95	0.68	1.69	0.042
ALS ratio × α × β	48	14.56	0.30	0.75	0.9013