Related Experiment Video
Updated: Aug 20, 2026
Multi-Modal Home Sleep Monitoring in Older Adults
Published on: January 26, 2019
Nightly variability of sleep-disordered breathing measured over 3 nights
Carl J Stepnowsky1, William C Orr, Terence M Davidson
1Health Services Research & Development Service, Veterans Affairs San Diego Healthcare System, California 92161, USA. cstepnowsky@ucsd.edu
Objective:
To examine the nightly variability of sleep-disordered breathing (SDB) as measured by the apnea-hypopnea index (AHI).
Study Design And Setting:
Retrospective comparison of 3 sequential nights of testing performed in the home in 1091 patients who were referred for diagnostic testing of SDB.
Results:
The Pearson and Intraclass correlation coefficients ranged between 0.88 and 0.90 for each pair of nights. Based on night 1, approximately 90% of patients were classified consistently with "AHI-high" (the highest AHI measured across the 3 nights) using an AHI threshold of 5. However, 10% were misclassified on night 1 relative to the highest AHI level.
Conclusion And Significance:
These findings suggest that (1) 1 night of diagnostic testing for SDB is not sufficient to diagnosis SDB in approximately 1 of every 10 cases, and (2) there is little, if any, significant nightly change in SDB in the home environment.
Ebm Rating:
D.
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