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Study Objectives: American Academy of Sleep Medicine (AASM) practice parameters indicate that split-night polysomnograms (SN-PSG) may be performed when the apnea hypopnea index (AHI) is ≥ 20 to 40, depending on clinical factors. qqviktori The aim of this study was to determine the diagnostic accuracy of SN-PSG, including at the lower range of AHIs. dunia 777