Moderators: Maria Chand, MD; B. Tucker Woodson, MD
10:30 am
Objectives
To validate the role of a portable screening device (SleepStrip) in the diagnosis of obstructive sleep apnea (OSA).
Methods
Data were prospectively collected from patients with suspected OSA who was scheduled for an overnight Level I polysomnogram (PSG). Patients who consented to participate in the study wore the SleepStrip device at home the night after the PSG. The apnea-hypopnea index (AHI) reported by PSG was compared to the results of the SleepStrip recording.
Results
Thirty-seven patients participated in the study with a mean age of 52.1 years (range, 18–79 years) and mean BMI of 35.7 (range,17.7–46.8). Five SleepStrips reported an “error” in recording with no data generated. The overall agreement between the AHI and the SleepStrip results using Cohen’s Kappa value was 0.139 (p= 0.19). The sensitivity and specificity of the SleepStrip for diagnosing severe OSA when the AHI was <40 were 33.3% and 95% (p< 0.05). When the AHI was 25, the Sleep Strip sensitivity and specificity were 43.8% and 81.3% (p=0.26). The sensitivity and specificity of the SleepStrip for diagnosing OSA in patients with an AHI 15 were 54.6% and 70% respectively (p=0.26).
Conclusion
The SleepStrip had a low correlation with the AHI as measured by PSG. While SleepStrip results appeared to correlate with PSG in severe OSA (AHI40), the SleepStrip showed low sensitivity and specificity in diagnosing mild (AHI 15) and moderate (AHI25) OSA. Future studies are needed before this device can be used as a screening tool for the diagnosis of OSA.
Singapore Singapore; Augusta GA; Augusta GA; Augusta GA; Augusta GA; Augusta GA
FULL TEXT