ahi_sr_ap5uhp5x5u_f1t1 - Search - Sleep Data - National Sleep Research Resource

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Apnea-Hypopnea Index (REM): (Apneas with >= 5% oxygen desaturation threshold used and with or without arousal+ hypopneas with > 50% flow reduction and with >= 5% oxygen desaturation used and with or without arousal) / hours of REM sleep from type I polysomnography

rdimrem5p under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables

[(total number of apneas and hypopneas in rapid eye movement sleep (REM) associated with >= 5% desaturation) / (hours of rapid eye movement sleep (REM))]