Journal
PSYCHOSOMATIC MEDICINE
Volume 72, Issue 2, Pages 178-186Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/PSY.0b013e3181c870a5
Keywords
sleep; aging; quality of life; physical health; inflammation
Categories
Funding
- John A. Hartford Foundation Center of Excellence in Geriatric Psychiatry
- University of Pittsburgh Medical Center Endowment in Geriatric Psychiatry
- [P01 AG20677]
- [P30 MH071944]
- [R01 MH37869]
- [R01 MH43832]
- [RR024153]
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Objectives: To determine in healthy people aged >= 75 years 1) if restricting time in bed and education in health sleep practices are superior to an attention-only control condition (i.e., education in healthy dietary practices) for maintaining or enhancing sleep continuity and depth over 2.5 years; and 2) if maintenance or enhancement of sleep continuity and depth promotes the maintenance or enhancement of health-related quality of life. Methods: Single-blind, randomized, clinical trial in a university-based sleep center, enrolling 64 adults (n = 30 women, 34 men; mean age = 79 years) without sleep/wake complaints ( e. g., insomnia or daytime sleepiness), followed by randomized assignment to either: 1) restriction of time in bed by delaying bedtime 30 minutes nightly for 18 months, together with education in healthy sleep practices ( SLEEP); or 2) attention-only control condition with education in health dietary practices ( NUTRITION). Results: SLEEP did not enhance sleep continuity or depth; however, compared with NUTRITION, SLEEP was associated with decreased time spent asleep ( about 30 minutes nightly over 18 months). Contrary to hypothesis, participants in SLEEP reported a decrement in physical health-related quality of life and an increase in medical burden ( cardiovascular illness), relative to NUTRITION. Neither markers of inflammation, body mass index, or exercise explained treatment-related changes in medical burden. Conclusions: Although we cannot exclude a positive effect of education in healthy nutrition, for healthy elderly >75 years of age without sleep complaints, reducing sleep time may be detrimental, whereas allowing more time to sleep ( about 7.5 hours nightly) is associated with better maintenance of physical health-related quality of life and stability of medical illness burden over 30 months.
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