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. 2020 Nov 9;8(11):e23123. doi: 10.2196/23123

Figure 4.

Figure 4

Apnea–hypopnea index (AHI) before (baseline) and after 3 months in patients with severe obstructive sleep apnea. Intragroup comparison from before to after the study was performed using the Wilcoxon test owing to the skewed data distribution. CG: control group; AGG: AirwayGym group.