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Receiver Operator Characteristics curves demonstrating the sensitivity and specificity of JDS in detecting objectively defined drowsiness (50% increase in PVT lapses, left) and subjectively defined drowsiness (KSS ≥ 6, right). Optimal cutoffs for JDS were 2.75 and 3.11 for a 50% increase in PVT lapses from baseline and KSS ≥ 6, respectively.
