If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Measurement variability in sleep disorders medicine: the Victorian experience

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

Abstract

Background: Surveys of laboratories in North America have documented significant diversity in the working definitions used for reporting respiratory events in sleep studies.

Aim: To assess sources of variability in the measurement of sleep-disordered breathing (as defined by the Apnoea−Hypopnoea Index) between sleep laboratories in Victoria, Australia.

Methods: A self-complete written questionnaire was constructed following literature review and interviews with staff at three separate sleep laboratories. The survey was sent to all laboratories listed in Victoria by the Australasian Sleep Association. The first part of the survey related to the type of equipment used to record sleep and other variables during overnight polysomnography and the second part related to the definitions and methods used to report results.

Results: Seventeen out of 18 laboratories returned the surveys. There were variations identified in the types of sensors used to measure particular signals. There were also inconsistencies identified in the criteria used to score arousals, apnoeas and hypopnoeas by different laboratories. The variability was greatest for hypopnoea definitions.

Conclusions: There is considerable variation in the methods used to measure and define sleep-disordered breathing between sleep laboratories in Victoria. The extent to which these variations influence the comparability of reported results between laboratories requires further evaluation. The survey findings may assist the process of developing and implementing local guidelines for the performance and reporting of polysomnography. (Intern Med J 2002; 32: 386−393)

Keywords: diagnosis; polysomnography; sleep disorders; sleep ­apnoea

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1445-5994.2002.00256.x

Affiliations: 1: Clinical Epidemiology and Health Service Evaluation Unit, Royal Melbourne Hospital, 2: Department of Respiratory Medicine, Austin and Repatriation Medical Centre, 3: Sleep and Ventilatory Failure Service, Alfred Hospital 4: Department of Respiratory and Sleep Disorders Medicine, Western Hospital, 5: Monash Medical Centre, Melbourne 6: Latrobe Valley Hospital, Traralgon, Victoria, Australia

Publication date: August 1, 2002

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more