Histogram

A4b. Visit of Sleep Study vs Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of estimated sleep
N Mean StdDev Median Min Max Unknown Total
Visit 1 3,012 1.0 ± 2.2 0.3 0.0 44.3 - 3,012
Visit 3 - - - - - - - -