Histogram

Visit Number vs Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep
N Mean StdDev Median Min Max Unknown Total
Baseline 453 6.4 ± 5.0 4.7 1.0 32.0 - 453
Follow-up 407 3.8 ± 6.9 1.8 0.0 73.3 46 453