Sleep, Mild Cognitive Impairment, and Interventions for Sleep Improvement: An Integrative Review.
Maral Torossian, Sarah Marie Fiske, Cynthia S Jacelon
PMID 33455559WHAT IT FOUND
In mild cognitive impairment, self-reported sleep problems are common, but objective sleep findings are inconsistent.
Sleep interventions improved some subjective sleep, but objective sleep changes were inconsistent.
Key findings
01Objective total sleep time was similar between healthy older adults and people with MCI or AD, ranging from 6.5 to 8.5 hours, but subjective and objective sleep reports often did not align.
02Sleep interventions improved some subjective sleep outcomes: a 20-week physical activity program improved sleep quality and cognition, and a CBT-derived group improved sleep quality with d=0.83, but objective sleep measures often did not differ.
03Sleep disturbance was associated with 1.39 times higher risk of developing MCI in a study and 1.53 times higher risk in another, but measurement limitations were noted.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for RNs
Read the rest of this summary
You get three full summaries a month, free, and we do not ask for a card. Search, the TL;DRs and your library stay unlimited either way.
What it does not show
The review did not combine studies statistically because the included designs were too varied. Sleep was measured in different ways, and subjective reports often did not match objective measures. Some studies used tools not intended for sleep measurement, or recorded sleep for too short a period to establish a pattern. Sleep medication use, stress, anxiety, education, comorbidity, and existing sleep disorders were not consistently controlled. Grey literature was excluded, which could have introduced publication bias. Intervention findings came from a small set of studies, including a secondary analysis, so causality and generalization are uncertain.
Declared interests
The authors declared no conflict of interest.
The easy way to misread this
Do not conclude that treating sleep reliably improves cognition or prevents mild cognitive impairment. The review found inconsistent objective sleep changes, and intervention evidence was limited and often subjective.