Figure 1 –

Bland-Altman plots showing the agreement between RP and PSG. A, Bland-Altman plots of differences in the ORDI-PSG and ORDI-LRP as a function of the mean ORDI derived from the two methods. B, Bland-Altman plots of differences in the ORDI-PSG and ORDI-HRP as a function of the mean ORDI derived from the two methods. C, Bland-Altman plots of differences in the OAHI-PSG and OAHI-LRP as a function of the mean OAHI derived from the two methods. D, Bland-Altman plots of differences in the OAHI-PSG and OAHI-HRP as a function of the mean OAHI derived from the two methods. HRP = home respiratory polygraphy; LRP = in-laboratory respiratory polygraphy; OAHI = obstructive apnea-hypopnea index; ORDI = obstructive respiratory disturbance index; PSG = polysomnography; RP = respiratory polygraphy.