Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/110984
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Type: Journal article
Title: Physician decision making and clinical outcomes with laboratory polysomnography or limited-channel sleep studies for obstructive sleep apnea: a randomized trial
Author: Chai-Coetzer, C.
Antic, N.
Hamilton, G.
McArdle, N.
Wong, K.
Yee, B.
Yeo, A.
Ratnavadivel, R.
Naughton, M.
Roebuck, T.
Woodman, R.
McEvoy, R.
Citation: Annals of Internal Medicine, 2017; 166(5):332-340
Publisher: American College of Physicians
Issue Date: 2017
ISSN: 0003-4819
1539-3704
Statement of
Responsibility: 
Ching Li Chai-Coetzer, Nick A. Antic, Garun S. Hamilton, Nigel McArdle, Keith Wong, Brendon J. Yee, Aeneas Yeo, Rajeev Ratnavadivel, Matthew T. Naughton, Teanau Roebuck, Richard Woodman and R. Doug McEvoy
Abstract: Background: The clinical utility of limited-channel sleep studies (which are increasingly conducted at home) versus laboratory polysomnography (PSG) for diagnosing obstructive sleep apnea (OSA) is unclear. Objective: To compare patient outcomes after PSG versus limited-channel studies. Design: Multicenter, randomized, noninferiority study. (Australian New Zealand Clinical Trials Registry: ACTRN12611000926932). Setting: 7 academic sleep centers. Participants: Patients (n = 406) aged 25 to 80 years with suspected OSA. Intervention: Sleep study information disclosed to sleep physicians comprised level 1 (L1) PSG data (n = 135); level 3 (L3), which included airflow, thoracoabdominal bands, body position, electrocardiography, and oxygen saturation (n = 136); or level 4 (L4), which included oxygen saturation and heart rate (n = 135). Measurements: The primary outcome was change in Functional Outcomes of Sleep Questionnaire (FOSQ) score at 4 months. Secondary outcomes included the Epworth Sleepiness Scale (ESS), the Sleep Apnea Symptoms Questionnaire (SASQ), continuous positive airway pressure (CPAP) compliance, and physician decision making. results: Change in FOSQ score was not inferior for L3 (mean difference [MD], 0.01 [95% CI, -0.47 to 0.49; P = 0.96]) or L4 (MD, -0.46 [CI, -0.94 to 0.02; P = 0.058]) versus L1 (noninferiority margin [NIM], -1.0). Compared with L1, change in ESS score was not inferior for L3 (MD, 0.08 [CI, -0.98 to 1.13; P = 0.89]) but was inconclusive for L4 (MD, 1.30 [CI, 0.26 to 2.35; P = 0.015]) (NIM, 2.0). For L4 versus L1, there was less improvement in SASQ score (-17.8 vs. -24.7; P = 0.018), less CPAP use (4.5 vs. 5.3 hours per night; P = 0.04), and lower physician diagnostic confidence (P = 0.003). Limitation: Limited-channel studies were simulated by extracting laboratory PSG data and were not done in the home. Conclusion: The results support manually scored L3 testing in routine practice. Poorer outcomes with L4 testing may relate, in part, to reduced physician confidence. Primary Funding Source: National Health and Medical Research Council and Repat Foundation.
Keywords: Sleep Apnea, Obstructive
Rights: © 2017 American College of Physicians
RMID: 0030077612
DOI: 10.7326/M16-1301
Appears in Collections:Medicine publications

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