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

Table 2

Risk level index of each ambulance operation policy, ALS ratio, undertriage rate α, and overtriage rate β.

ALS ratio	Undertriage rate α	Overtriage rate β
		0		0.1		0.2		0.3		0.4
		Greedy	ADP	Greedy	ADP	Greedy	ADP	Greedy	ADP	Greedy	ADP
0.5	0	5.12	3.99	5.26	4.21	5.48	4.32	5.57	4.61	5.68	4.89
	0.1	5.58	5.11	5.81	5.31	5.91	5.60	6.12	5.93	6.19	6.12
	0.2	5.98	5.75	6.34	5.97	6.30	6.12	6.49	6.45	6.62	6.67
	0.3	6.50	6.26	6.74	6.38	6.73	6.47	6.97	6.69	7.10	6.79
	0.4	7.00	6.45	7.19	6.49	7.41	6.68	7.46	6.78	7.52	6.90
0.67	0	4.07	3.43	4.13	3.45	4.18	3.52	4.20	3.59	4.30	3.70
	0.1	4.47	3.99	4.47	4.14	4.51	4.23	4.60	4.32	4.61	4.46
	0.2	4.78	4.38	4.77	4.47	4.89	4.40	4.90	4.52	4.93	4.68
	0.3	5.12	4.45	5.06	4.60	5.24	4.72	5.16	4.65	5.32	4.75
	0.4	5.43	4.55	5.49	4.75	5.48	4.70	5.69	4.69	5.59	4.84
0.83	0	3.47	2.99	3.47	3.03	3.57	3.09	3.55	3.12	3.58	3.09
	0.1	3.66	3.31	3.78	3.29	3.77	3.41	3.77	3.38	3.79	3.43
	0.2	3.90	3.39	3.88	3.40	3.90	3.45	3.89	3.43	3.95	3.47
	0.3	4.03	3.43	4.08	3.47	4.04	3.47	4.08	3.56	4.08	3.46
	0.4	4.17	3.46	4.23	3.45	4.17	3.54	4.30	3.46	4.36	3.49
1	0	3.18	2.71	3.17	2.72	3.19	2.8	3.15	2.76	3.16	2.73
	0.1	3.18	2.74	3.20	2.79	3.17	2.8	3.17	2.77	3.18	2.80
	0.2	3.18	2.74	3.18	2.76	3.17	2.83	3.17	2.77	3.17	2.83
	0.3	3.18	2.78	3.17	2.80	3.17	2.80	3.16	2.78	3.17	2.78
	0.4	3.14	2.81	3.16	2.80	3.16	2.85	3.17	2.82	3.16	2.79

Note. is less than 0.001 in all experiments except ; not significant.