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Relationship between longitudinal change in ADPiB-mask and the apnea–hypopnea indices at baseline. ADPiB-mask = Alzheimer’s disease vulnerable regions of interest Pittsburg compound B positron emission tomography mask; AHI = apnea–hypopnea index; AHI4% = sum of all apneas and hypopneas associated with greater that 4% oxygen desaturation; AHIall = sum of all apneas, hypopneas, or arousals; PiB = Pittsburgh compound B.
