Summary of ROC curve of CRB-65, MEWS and qSOFA scores in association with need for mechanical ventilation.

Table 5: Summary of ROC curve of CRB-65, MEWS and qSOFA scores in association with need for mechanical ventilation.

Predictor	Cut off	Sensitivity	Specificity	PPV	NPV	LR+	LR-	AUC (95% CI)
CRB-65	> 2	30%	84.75%	40%	78.12%	1.9667	0.8260	0.6335 (0.54 to 0.72)
MEWS	> 4	62.50%	65.25%	37.88%	83.70%	1.7988	0.5747	0.6564 (0.55 to 0.76)
qSOFA	> 2	42.50%	77.97%	39.53%	80%	1.9288	0.7375	0.5938 (0.49 to 0.69)