Neuropsychological Functioning in Older Adults with Mild Cognitive Impairment and Insomnia Randomized to CBT-I or Control Group

Clin Gerontol. Mar-Apr 2018;41(2):136-144. doi: 10.1080/07317115.2017.1384777. Epub 2017 Dec 8.

Abstract

Objectives: Improving the sleep of older adults with mild cognitive impairment (MCI) represents a first step in discovering whether interventions directed at modifying this risk factor also have the potential to alter the cognitive decline trajectory.

Methods: A six-session, adapted version of a cognitive behavioral therapy for insomnia (CBT-I) was administered to older adults (N = 28; 14 per group) with MCI across two residential facilities. Participants were randomly assigned to either the sleep intervention or an active control group and completed a neuropsychological battery at three time points (e.g., baseline-T1, post-intervention-T2, 4 month follow-up-T3).

Results: Results showed a significant improvement in sleep and a change (p < .05) on a key measure of executive functioning sub task of inhibition (Condition 3 of D-KEF Color-Word Interference Test), a positive trend on the inhibition-switching task (p < .10; Condition 4 of D-KEF Color-Word Interference Test), an no change in a measure of verbal memory (HVLT-R Delayed Recall) compared with the active control group.

Conclusions: CBT-I is a nonpharmacological intervention that has the potential to cognitively benefit individuals with MCI suffering from comorbid insomnia.

Clinical implications: Results suggest that a non-pharmacological intervention to improve sleep in older adults with MCI also improve cognitive functioning. Further exploration of the mechanisms underlying these improvements is warranted.

Keywords: CBT-I; MCI; nonpharmacological; older adults; sleep.

Publication types

  • Multicenter Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Activities of Daily Living
  • Aged, 80 and over
  • Cognitive Behavioral Therapy / methods*
  • Cognitive Dysfunction / complications*
  • Executive Function / physiology
  • Female
  • Homes for the Aged
  • Humans
  • Male
  • Mental Status and Dementia Tests
  • Polypharmacy
  • Sleep / physiology
  • Sleep Initiation and Maintenance Disorders / complications
  • Sleep Initiation and Maintenance Disorders / therapy*