Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/12786
Title: Patients' estimates of their sleep times: reliability and impact on diagnosis of obstructive sleep apnoea.
Authors: Khor, Y H;Tolson, J;Churchward, Thomas;Rochford, Peter D;Worsnop, Christopher J
Affiliation: Department of Respiratory and Sleep Medicine, Austin Hospital, Heidelberg, Victoria, Australia
Issue Date: 6-May-2015
Citation: Internal Medicine Journal; 45(8): 850-3
Abstract: Home polysomnography (PSG) is an alternative method for diagnosis of obstructive sleep apnoea (OSA). Some types 3 and 4 PSG do not monitor sleep and so rely on the patient's estimation of total sleep time (TST). The study compared patients' subjective sleep duration estimation with objective measures in patients who underwent type 2 PSG for probable OSA.A prospective clinical audit of 536 consecutive patients of one of the authors between 2006 and 2013. A standard questionnaire was completed by the patients the morning after the home PSG to record the time of lights being turned off and estimated time of sleep onset and offset. PSG was scored based on the guidelines of the American Academy of Sleep Medicine.Median estimated sleep latency (SL) was 20 minutes compared to 10 minutes for measured SL (p < 0.0001). There was also a significant difference between the estimated and measured sleep offset time (median difference = -1 minute, p = 0.01). Estimated TST was significantly shorter than the measured total sleep time (median difference = -18.5 minutes, p =0.002). No factors have been identified to affect patients' accuracy of sleep perception. Only 2% of patients had a change in their diagnosis of OSA based on calculated AHI.Overall estimated TST in the patients with probable OSA was significantly shorter than measured with significant individual variability. Collectively, inaccurate sleep time estimation had not resulted in significant difference in the diagnosis of OSA.
Internal ID Number: 25944502
URI: http://ahro.austin.org.au/austinjspui/handle/1/12786
DOI: 10.1111/imj.12798
ORCID: 0000-0003-1471-9318
URL: http://www.ncbi.nlm.nih.gov/pubmed/25944502
Type: Journal Article
Subjects: Apnoea-hypopnoea index
obstructive sleep apnoea
sleep latency
total sleep time
type 2 polysomnography
Appears in Collections:Journal articles

Files in This Item:
There are no files associated with this item.


Items in AHRO are protected by copyright, with all rights reserved, unless otherwise indicated.