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. 2017 Jan 15;13(1):121–126. doi: 10.5664/jcsm.6404

Figure 2. Bland-Altman plots showing the difference between PSG and method 2 (using total recording time) for total sleep time and the AHI.

Figure 2

Lines represent the mean bias and the two standard deviations of the difference. PSG = polysomnography, AHI = apnea-hypopnea index.