Effects of Sleep Apnea Syndrome on Delayed Memory and Executive Function in Elderly Adults
Version of Record online: 30 MAY 2012
© 2012, Copyright the Authors Journal compilation © 2012, The American Geriatrics Society
Journal of the American Geriatrics Society
Volume 60, Issue 6, pages 1099–1103, June 2012
How to Cite
Ju, G., Yoon, I.-Y., Lee, S. D., Kim, T. H., Choe, J. Y. and Kim, K. W. (2012), Effects of Sleep Apnea Syndrome on Delayed Memory and Executive Function in Elderly Adults. Journal of the American Geriatrics Society, 60: 1099–1103. doi: 10.1111/j.1532-5415.2012.03961.x
- Issue online: 12 JUN 2012
- Version of Record online: 30 MAY 2012
- Korean Health Technology R&D Project
- Ministry for Health, Welfare, and Family Affairs, Republic of Korea. Grant Number: Grant A092077
- Basic Science Research Program through the National Research Foundation of Korea
- Ministry of Education, Science and Technology. Grant Number: Grant 2010–0008886
- sleep apnea syndrome;
To identify differences in cognitive function between elderly adults with sleep apnea syndrome (SAS) and healthy controls.
Sleep laboratory at Seoul National University Bundang Hospital.
Sixty-three elderly adults (26 female; mean age 68.2 ± 4.8) without cognitive disorders.
Sleep-laboratory polysomnography findings and cognitive function results determined using the Korean version of the Consortium to Establish a Registry for Alzheimer's Disease Neuropsychological Assessment Battery.
When the control group (apnea–hypopnea index (AHI) < 15) was compared with the groups with mild to moderate (15 ≤ AHI < 30) and severe (AHI ≥ 30) SAS, significant differences in delayed recall (P = .003) and errors on the Trail-Making Test Part B (TMT B; P = .009) were observed, with participants with severe SAS showing greater impairment on both tests than controls (P = .02 and P = .01, respectively). Stepwise multiple regression showed that oxygen desaturation index (β = −0.37, P = .003) and educational level (β = 0.24, P = .04) determined delayed recall impairment (adjusted coefficient of determination (R 2) = 17.8%, P = .003). TMT B errors were independently associated with educational level (β = −0.41, P = .001) and AHI (β = 0.31, P = .007; adjusted R 2 = 25.7%, P = .001).
Severe SAS is associated with measures of delayed recall and executive function in cognitively healthy older adults. Although further study is needed, this evidence may provide further rationale for the treatment of SAS in older adults. Moreover, the role of SAS as a risk factor for cognitive disorders needs to be determined.