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Reliability of a single objective measure in assessing sleepiness.

Authors
Sunwoo-BY; Jackson-N; Maislin-G; Gurubhagavatula-I; George-CF; Pack-AI
Source
Sleep 2012 Jan; 35(1):149-158
NIOSHTIC No.
20040784
Abstract
STUDY OBJECTIVES: To evaluate reliability of single objective tests in assessing sleepiness. DESIGN: Subjects who completed polysomnography underwent a 4-nap multiple sleep latency test (MSLT) the following day. Prior to each nap opportunity on MSLT, subjects performed the psychomotor vigilance test (PVT) and divided attention driving task (DADT). Results of single versus multiple test administrations were compared using the intraclass correlation coefficient (ICC) and adjusted for test administration order effects to explore time of day effects. Measures were explored as continuous and binary (i.e., impaired or not impaired). SETTING: Community-based sample evaluated at a tertiary, university-based sleep center. PARTICIPANTS: 372 adult commercial vehicle operators oversampled for increased obstructive sleep apnea risk. INTERVENTIONS: N/A MEASUREMENTS AND RESULTS: AS CONTINUOUS MEASURES, ICC WERE AS FOLLOWS: MSLT 0.45, PVT median response time 0.69, PVT number of lapses 0.51, 10-min DADT tracking error 0.87, 20-min DADT tracking error 0.90. Based on binary outcomes, ICC were: MSLT 0.63, PVT number of lapses 0.85, 10-min DADT 0.95, 20-min DADT 0.96. Statistically significant time of day effects were seen in both the MSLT and PVT but not the DADT. Correlation between ESS and different objective tests was strongest for MSLT, range [-0.270 to -0.195] and persisted across all time points. CONCLUSIONS: Single DADT and PVT administrations are reliable measures of sleepiness. A single MSLT administration can reasonably discriminate individuals with MSL < 8 minutes. These results support the use of a single administration of some objective tests of sleepiness when performed under controlled conditions in routine clinical care.
Keywords
Testing-equipment; Sleep-deprivation; Rest-periods; Psychomotor-function; Task-performance; Drivers; Sleep-disorders; Measurement-equipment; Clinical-tests; Clinical-techniques; Humans; Neurophysiological-effects; Physiological-measurements; Physiological-fatigue; Author Keywords: Excessive sleepiness; multiple sleep latency test; psychomotor vigilance test; divided attention driving task; objective tests
Contact
Bernie Y. Sunwoo, BSc, MBBS, Center for Sleep and Circadian Neurobiology, 3624 Market Street, Suite 205, Philadelphia, PA 19104
CODEN
SLEED6
Publication Date
20120101
Document Type
Journal Article
Email Address
bernie.sunwoo@uphs.upenn.edu
Funding Type
Grant
Fiscal Year
2012
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-009149; B05222012
Issue of Publication
1
ISSN
0161-8105
Source Name
Sleep
State
PA
Performing Organization
University of Pennsylvania
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