Sleep Diagnosis and Therapy

Official Publication of the American Sleep and Breathing Academy

Comparison of polysomnographic and portable home monitoring assessments of obstructive sleep apnea in Saskatchewan women.

by

Gjevre JA, Taylor-Gjevre RM, Skomro R, Reid J, Fenton M, Cotton D.
Source
Division of Respiratory, Critical Care and Sleep Medicine, University of Saskatchewan, Saskatoon, Saskatchewan. john.gievre@usask.ca

Abstract

OBJECTIVES:

To compare a commercially available, level III in-home diagnostic sleep test (Embletta, Embletta USA) and in-laboratory polysomnography (PSG) in women with suspected obstructive (OSA).
METHODS:
Consecutive women scheduled for routine PSG testing for evaluation of clinically suspected OSA and who met inclusion⁄exclusion criteria, were invited to participate. An in-home Embletta portable monitor test was performed one week before or after diagnostic PSG.

RESULTS:

Forty-seven of 96 women who met the inclusion⁄exclusion criteria agreed to participate. The mean (± SD) age of the patients was 52.0 ± 11.0 years, with a mean body mass index of 34.86 ± 9.04 kg⁄m2, and 66% (31 of 47) of patients were at high risk for OSA according to the Berlin score. Paired analysis of the overall population revealed no significant difference in mean apnea⁄hypopnea index (AHI) between the two diagnostic methods (P = 0.475). At an AHI of ≥ 5, the Embletta test was highly sensitive (90.6%) in determining abnormal versus normal OSA, with a positive predictive value of 82.7%. However, a higher Embletta AHI threshold of ≥ 10 may be more useful, with a higher level of agreement (kappa coefficient) with PSG testing and a positive predictive value of 92.3%. The in-home study was less useful at distinguishing severe from nonsevere OSA, yielding a sensitivity of 50%.

CONCLUSIONS:

In women believed to be at high-risk for OSA, Embletta in- is useful for the detection of sleep disordered breathing.

Can Respir J. 2011 Nov-Dec;18(6):318-9.

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