The efficiency for detecting OSA with ESS, PRE-1 and PRE-2 versus PSG in the validation cohort (n = 784).

OSA = obstructive sleep apnea; ESS = Epworth Sleepiness Scale; PRE-1 = the predictive variable for the first diagnostic model; PRE-2 = the predictive variable for the second diagnostic model; AUC = area under the ROC curve; +LR = Positive likelihood ratio; −LR = Negative likelihood ratio; +PV = Positive predictive value; −PV = Negative predictive value.*The AUCs of ESS, PRE-1 and PRE-2 compared in pairs, PValues in parentheses are 95% confidence intervals.