Volume 7 Supplement 1

International Society on Brain and Behaviour: 3rd International Congress on Brain and Behaviour

Open Access

Objectively measured sleep quality and functional impairment in family caregivers of older adults with memory disorders

  • Adam Spira1,
  • Leah Friedman2, 4,
  • Laura Haagenson2, 4,
  • Javaid Sheikh2, 3, 4 and
  • Jerome Yesavage2, 3, 4
Annals of General Psychiatry20087(Suppl 1):S246

https://doi.org/10.1186/1744-859X-7-S1-S246

Published: 17 April 2008

Background

Poor sleep quality has been linked to functional impairment in several populations [14] but this association has not been investigated widely in family caregivers of older adults with memory disorders. We investigated the association between objectively measured sleep and functional status in a sample of family caregivers.

Materials and methods

Participants were 42 caregiver-patient dyads. Caregivers completed the Beck Depression Inventory (BDI-II) [5] and the Medical Outcomes Study SF-36 [6]. The “physical function” subscale of the SF-36 measures difficulty lifting groceries, climbing stairs, etc. Scores range from 1 to 100; higher scores indicate better function. Caregivers completed 1 week of actigraphy–an objective means of measuring sleep by recording movement. We calculated their total sleep time (TST; mean time asleep while in bed) and sleep efficiency (SE; mean percentage of time asleep while in bed).

Results

Caregivers' mean age was 69.4 ±13.6 years. Patients' mean age was 79.8 ±7.6 years; their mean Mini-Mental State Exam [7] score was 21.3 ± 4.9. Caregivers' mean physical function score was 72.6 ±23.2. In regression analyses (adjusted for age, self-rated health, and BDI-II), each 1-hour increase in TST was associated with a 5.7-point increase in physical function (Beta=5.71, p=.001, R-squared=.75), and each 10% increase in SE predicted a 3.8-point increase in physical function (Beta=3.79, p=.02, R-squared=.69).

Conclusions

In family caregivers, greater TST and SE were independently associated with better physical function after controlling for potential confounders. Future, longitudinal studies are needed to establish the directions of these relationships and to evaluate whether poor sleep might be a preventable cause of disability in caregivers.

Declarations

Acknowledgements

Research supported by the Medical Research Service of the Palo Alto Veterans Affairs Health Care System, by the Department of Verterans Affairs Sierra Pacific MIRECC, and by AG21134.

Authors’ Affiliations

(1)
Division of Geriatrics and Department of Psychiatry, University of California
(2)
Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine
(3)
Veterans Affairs Palo Alto Health Care System
(4)
Department of Veterans Affairs Sierra Pacific Mental Illness Research, Education, and Clinical Center (MIRECC)

References

  1. Byles JE, Mishra GD, Harris MA, Nair K: The problems of sleep for older women: Changes in health outcomes. Age and Ageing. 2003, 32: 154-163. 10.1093/ageing/32.2.154.View ArticleGoogle Scholar
  2. Motivala SJ, Levin MJ, Oxman MN, Irwin MR: Impairments in health functioning and sleep quality in older adults with a history of depression. J Am Geriatr Soc. 2006, 54 (8): 1184-1191. 10.1111/j.1532-5415.2006.00819.x.View ArticleGoogle Scholar
  3. Newman AB, Enright PL, Manolio TA, Haponik EF, Wahl PW: Sleep disturbance, psychosocial correlates, and cardiovascular disease in 5201 older adults: the Cardiovascular Health Study. J Am Geriatr Soc. 1997, 45 (1): 1-7.View ArticleGoogle Scholar
  4. Ohayon MM, Vecchierini MF: Normative sleep data, cognitive function and daily living activities in older adults in the community. Sleep. 2005, 28 (8): 981-989.Google Scholar
  5. Beck A, Steer R, Brown G: Beck Depression Inventory - II. San Antonio. TX: Harcourt Brace & Company. 1996Google Scholar
  6. Ware JE, Sherbourne CD: The MOS 36-item short-form health survey (SF-36). I. Conceptual framework and item selection. Med Care. 1992, 30 (6): 473-483. 10.1097/00005650-199206000-00002.View ArticleGoogle Scholar
  7. Folstein MF, Folstein SE, McHugh PR: Mini-mental state: A practical method for grading the cognitive state of patients for the clinician. Journal of Psychiatric Research. 1975, 12 (3): 189-198. 10.1016/0022-3956(75)90026-6.View ArticleGoogle Scholar

Copyright

© Spira et al.; licensee BioMed Central Ltd. 2008

This article is published under license to BioMed Central Ltd.

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