Figure 2. Concordance for RDI/REI.
Concordance for RDI/REI between T1PSG and T2PSG. Mean is shown in red and the upper and lower limits of agreement (mean ± 1.96 SD) in blue. RDI = respiratory disturbance index, REI = respiratory event index, T1PSG = type 1 polysomnography, T2PSG = type 2 polysomnography.