Article2003

Predictors of Objective Sleep Tendency in the General Population

Naresh M. Punjabi · Karen Bandeen‐Roche · Terry B Young

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Abstract

STUDY OBJECTIVES: Daytime sleepiness is a pervasive problem that is associated with a significant public-health burden. Although self-reported measures of daytime sleepiness may be useful in identifying at-risk individuals, there is significant controversy because there are no population-based data relating subjective and objective measures of daytime sleep tendency. The aims of this study were to examine the associations between the Multiple Sleep Latency Test (MSLT), an objective measure of daytime sleep tendency, and self-reported information on the Epworth Sleepiness Scale (ESS) and nighttime sleep duration in the general population. DESIGN: Cross-sectional study. SETTING AND PARTICIPANTS: Population-based sample of 261 women and 371 men, mean age of 50.8 years, enrolled in the Wisconsin Sleep Cohort Study. MEASUREMENTS: MSLT, ESS, and self-reported sleep duration prior to the MSLT. RESULTS: Using survival analysis to model the time to sleep onset during the MSLT, we found that individuals with an intermediate (6-11) and high (> or = 12) ESS score had a 30% and 69% increase in risk for sleep onset during the MSLT, respectively, compared to individuals with a low ESS score (< or = 5). A dose-response relationship between self-reported duration of nighttime sleep and objective sleep tendency was also observed. Compared to individuals reporting more than 7.50 hours of sleep (highest tertile), individuals reporting 6.75 to 7.50 hours and less than 6.75 hours (lowest tertile) had a 27% and 73% increase in risk for sleep onset during the MSLT, respectively. CONCLUSIONS: Subjective reports of daytime sleep tendency on the ESS and the duration of nighttime sleep are associated with the results of the MSLT in the general population.

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References

1991A New Method for Measuring Daytime Sleepiness: The Epworth Sleepiness Scale 1969A manual of standardized terminology, techniques and scoring system for sleep stages of human subjects 2003The Cumulative Cost of Additional Wakefulness: Dose-Response Effects on Neurobehavioral Functions and Sleep Physiology From Chronic Sleep Restriction and Total Sleep Deprivation 1997Cumulative Sleepiness, Mood Disturbance, and Psychomotor Vigilance Performance Decrements During a Week of Sleep Restricted to 4–5 Hours per Night 2002Mortality Associated With Sleep Duration and Insomnia 2003A Prospective Study of Self-Reported Sleep Duration and Incident Diabetes in Women 1994Sleepiness in Different Situations Measured by the Epworth Sleepiness Scale 1981Cumulative Effects of Sleep Restriction on Daytime Sleepiness

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