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Receiver operating characteristic Curve analysis of PSQ for diagnosis of moderate-to severe OSA. PSQ showed a good accuracy in predicting moderate-to-severe OSA with an AUC of 0.879 (95% CI 0.779–0.975, p < 0.0001). The cut-off of 0.65 showed a sensitivity of 80% and a specificity of 100%. Legend: ROC: receiver operating characteristic.
