The efficiency for detecting OSA with PRE-1 and PRE-2 versus PSG in the test cohort (n = 2,032).

PRE-1 = the predictive variable for the first diagnostic model; PRE-2 = the predictive variable for the second diagnostic model; PSG = polysomnography; 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.