Table 7. Sensitivities, specificities, and accuracy rates of the RAPS, MEWS, REMS, and MEDS scoring systems for predicting mortality.

Variable	Accuracy rate	Optimal cut-off	Sen	Sp	PPV	NPV
MEDS	88.60%	8	92.86%	88%	52%	98.88%
MEWS	82.46%	6	57.14%	86%	36.36%	93.48%
RAPS	71.05%	4	57.14%	73%	22.86%	92.41%
REMS	71.05%	7	64.29%	72%	24.32%	93.51%