Table 4. Sensitivity and specificity at the cutoff of the highest Youden Index—Derivation cohort.

	Cutoff	Sensitivity	Specificity
RSBI in SBT (breaths/min/L)	55	0.778	0.703
Dynamic Lung Compliance (ml/cmH2O)	51	0.889	0.564
Days of Mechanical Ventilation	4	0.778	0.495
Muscle Strength (MRC)	48	0.444	0.772
Estimated Glasgow Coma Scale	14	0.556	0.624
Creatinine (mg/dL)	1.0	0.667	0.594
Hematocrit (%)	29	0.778	0.485

RSBI: Rapid shallow-breathing index. SBT: Spontaneous Breathing Trial. MRC: Medical Research Council.