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Hypopnea Index (NREM, Supine) : (Hypopneas with > 50% flow reduction and with >= 2% oxygen desaturation and with or without arousal) / hour of NREM sleep in supine position from type I polysomnography
rdinbp2 under Sleep Monitoring/Polysomnography/Apnea-Hypopnea Indices in CHAT variables
Calculated - Summary metric of sleep disordered breathing events.
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