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Abstract: Poster Presentations |

PERCEPTION OF TOTAL SLEEP TIME (TST) IN SUBJECTS WITH VARIOUS SLEEP DISORDERS BUT NORMAL RAPID EYE MOVEMENT SLEEP (REM) FREE TO VIEW

Zinobia Khan, MD*; Moses Bachan, MD; Sara Hyatt, BS; Joseph Ghassibi, MD; Stephen Lund, MD; Jon Freeman, PhD
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Sleep Disorders Institute, New York, NY


Chest


Chest. 2009;136(4_MeetingAbstracts):67S. doi:10.1378/chest.136.4_MeetingAbstracts.67S
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Abstract

PURPOSE:  Sleep state misperception is a discrepancy between the amount of perceived sleep relative to objectively defined sleep. Evidence suggests that REM sleep-related processes contribute to misperception of TST in primary insomnia. To date, no studies have examined sleep misperception in obstructive sleep apnea(OSA) or other sleep disorders.

METHODS:  A retrospective study was conducted to determine if a specific sleep disorder led to differences in sleep perception. One hundred and forty-two (142) subjects were divided into five groups: primary insomnia, upper airway resistance syndrome (UARS)/primary snoring, mild OSA, moderate OSA and severe OSA. The subjects’ perception of how much they slept was compared with total sleep time (TST). Perception estimates were additionally quantified by looking at estimates relative to TST: 1. normal estimators within 1 standard deviation (SD) 2. abnormal estimators, 2SD 3. severely inaccurate estimators, 3SD. The subjects’ age, BMI, TST and sleep efficiency (SE), REM and delta time were compared. The inclusion criteria were normal percentage of REM sleep, TST minimum of 4.5 hours and diagnostic NPSG. Many exclusion criteria were used.

RESULTS:  The mean data for all subjects were: age 46.0 ± 14.5; BMI 29.0 ± 5.9; TST 368.4 ± 37.9; SE 85.5 ± 7.2; REM time 79.3 ± 17.4; REM percentage 21.5 ± 4.1; delta time 37.1 ± 30.1; delta percentage 10.0 ± 8.0. There were no statistically significant differences in the groups with respect to age, TST, SE, REM time, REM%, delta time and delta%. The mean age increase from normal to severely abnormal estimators. There were statistically significant differences in delta time, delta percent, time estimate and percentage of estimation between men and women.

CONCLUSION:  In subjects with approximately twenty percent (20%) of REM sleep, thirty-two (32%) with various disorders will not correctly perceive their sleep. There are no differences in perception among subjects with OSA and other disorders. As subjects age, the trend is, they do not accurately estimate their sleep. Women have more delta sleep but underestimate their sleep when compared to men.

CLINICAL IMPLICATIONS:  There are factors other than normal REM and delta time that affects sleep perception.

DISCLOSURE:  Zinobia Khan, No Financial Disclosure Information; No Product/Research Disclosure Information

Tuesday, November 3, 2009

12:45 PM - 2:00 PM


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