TY - JOUR
T1 - Diagnostic accuracy of split-night polysomnograms
AU - Khawaja, Imran S.
AU - Olson, Eric J.
AU - Van Der Walt, Christelle
AU - Bukartyk, Jan
AU - Somers, Virend
AU - Dierkhising, Ross
AU - Morgenthaler, Timothy I.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2010/8/15
Y1 - 2010/8/15
N2 - Study Objectives: American Academy of Sleep Medicine (AASM) practice parameters indicate that split-night polysomnograms (SN-PSG) may be performed when the apnea hypopnea index (AHI) is ≥ 20 to 40, depending on clinical factors. The aim of this study was to determine the diagnostic accuracy of SN-PSG, including at the lower range of AHIs. Methods: We reviewed 114 consecutive full-night PSGs (FN-PSG) performed at our center between August 2006 and November 2008 on subjects enrolled in studies in which obstructive sleep apnea (OSA) was the sleep disorder of interest. We compared the AHI from the first 2 hours (2hr-AHI) and 3 hours (3hr-AHI) of sleep with the "gold standard" AHI from FN-PSG (FN-AHI), considering OSA present if FN-AHI ≥ 5. Results: The 2hr-AHI and 3hr-AHI correlated strongly with the FN-AHI (concordance correlation coefficient [CCC] = 0.93 and 0.97, respectively). After adjusting for percentage of sleep in stage REM sleep and in supine position, the correlation of 2 hr- and 3 hr-AHI with FN-AHI remained strong (0.92 and 0.96, respectively). The area under the receiver operating curves (AUC) for 2hr-AHI and 3hr-AHI using FN-AHI ≥ 5 were 0.93 and 0.95, respectively. Conclusions: The AHI derived from the first 2 or 3 hours of sleep is of sufficient diagnostic accuracy to rule-in OSA at an AHI threshold of 5 in patients suspected of having OSA. This study suggests that the current recommended threshold for split-night studies (AHI ≤ 20 to 40) may be revised to a lower number, allowing for more efficient use of resources.
AB - Study Objectives: American Academy of Sleep Medicine (AASM) practice parameters indicate that split-night polysomnograms (SN-PSG) may be performed when the apnea hypopnea index (AHI) is ≥ 20 to 40, depending on clinical factors. The aim of this study was to determine the diagnostic accuracy of SN-PSG, including at the lower range of AHIs. Methods: We reviewed 114 consecutive full-night PSGs (FN-PSG) performed at our center between August 2006 and November 2008 on subjects enrolled in studies in which obstructive sleep apnea (OSA) was the sleep disorder of interest. We compared the AHI from the first 2 hours (2hr-AHI) and 3 hours (3hr-AHI) of sleep with the "gold standard" AHI from FN-PSG (FN-AHI), considering OSA present if FN-AHI ≥ 5. Results: The 2hr-AHI and 3hr-AHI correlated strongly with the FN-AHI (concordance correlation coefficient [CCC] = 0.93 and 0.97, respectively). After adjusting for percentage of sleep in stage REM sleep and in supine position, the correlation of 2 hr- and 3 hr-AHI with FN-AHI remained strong (0.92 and 0.96, respectively). The area under the receiver operating curves (AUC) for 2hr-AHI and 3hr-AHI using FN-AHI ≥ 5 were 0.93 and 0.95, respectively. Conclusions: The AHI derived from the first 2 or 3 hours of sleep is of sufficient diagnostic accuracy to rule-in OSA at an AHI threshold of 5 in patients suspected of having OSA. This study suggests that the current recommended threshold for split-night studies (AHI ≤ 20 to 40) may be revised to a lower number, allowing for more efficient use of resources.
KW - Diagnostic accuracy
KW - Obstructive sleep apnea (OSA)
KW - Polysomnography (PSG)
KW - Split-night polysomnography
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U2 - 10.5664/jcsm.27877
DO - 10.5664/jcsm.27877
M3 - Article
C2 - 20726284
AN - SCOPUS:77956282304
VL - 6
SP - 357
EP - 362
JO - Journal of Clinical Sleep Medicine
JF - Journal of Clinical Sleep Medicine
SN - 1550-9389
IS - 4
ER -