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. 2020 Mar 15;16(3):431–439. doi: 10.5664/jcsm.8224

Figure 2. Distribution of AHI and maximum negative pressure and maximum velocity in the OSA and control groups.

Figure 2

Left: distribution of AHI and maximum negative pressure. The correlation of maximum negative pressure with AHI (rs) is shown (rs = −.653, P = .002). White markers indicate control data (AHI < 5 events/h); black markers, OSA data (AHI > 5 events/h). Right: distribution of AHI and maximum velocity. The correlation between maximum velocity and AHI (rs) was very strong (rs = .741, P < .001) and allowed the use of 12 m/s as a demarcation between the OSA and control groups. AHI = apnea-hypopnea index, OSA = obstructive sleep apnea.