The AASM recommends scoring hypopneas in adults when there is a ≥ 3% oxygen de-saturation or when the event is associated with an arousal,10 but there is no rule regarding the duration of the interval between an event and the associated arousal. We explored the relationship between cortical arousals and spontaneous respiratory events in 11,400 PSG records from adults from 10 independent clinical research and community cohort datasets that had been manually scored for apneas, hypopneas, and cortical arousals.
There were more than 2.3 million scored SDB events (> 350,000 apneas and > 1.9 million hypopneas, including central, mixed, and obstructive events) and more than 1.6 million cortical arousals in the datasets. Approximately 99% of all SDB events were shorter than 60 seconds and 99% of all cortical arousals were shorter than 30 seconds. The ABC study19 had the highest number of records in the most severe AHI > 30 category (71.2%), while the MPCS study19 had the fewest (32.8%). Similarly, the MSS had the highest number of records in the least severe AHI < 5 category (25.3%), while the ABC study had the fewest (0.8%). As expected, AHI correlated positively with the ArI, such that the AHI increased by 1.40–1.54 points with each doubling of the ArI. This is in line with previous studies that have found strong correlation between AHI and ArI.
Комментарии