Implementation of Dynamic Lighting in a Nursing Home: Impact on Agitation but not on Rest-Activity Patterns

Jun 10, 2017Current Alzheimer research

Dynamic Lighting in a Nursing Home Reduces Agitation but Does Not Change Sleep and Activity Patterns

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Circadian Biology on OpenScience ↗PubMed ↗DOI ↗

Abstract

The dynamic lighting system reduced agitation scores from 30.2±5.1 to 27.9±2.6 in patients with dementia.

The Cohen Mansfield Agitation Index (CMAI) scores indicate a significant reduction in overall agitation following the introduction of the lighting system.
Non-physically aggressive behaviors were primarily reduced under the dynamic lighting conditions.
Rest-activity analysis did not reveal significant changes in circadian patterns after the lighting intervention.
The findings suggest that increased daily light exposure may provide short-term benefits for managing agitation in dementia patients.
Further research is needed to assess the long-term effects of dynamic lighting on circadian rest-activity cycles.

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OBJECTIVE: Disturbances of circadian rest-activity rhythms in demented patients often culminate in the clinical problem of evening and nighttime agitation. The aim of the current study was to test the impact of a dynamic lighting system on agitation and rest-activity cycles in patients with dementia.

METHODS: From midwinter on, a ceiling mounted dynamic lighting system was installed in the common room of a nursing home and programmed to produce high illuminance with higher blue light proportions during the day and lower illuminance without blue light in the evening. Fifteen residents with dementia were regularly assessed with the Cohen Mansfield Agitation Index (CMAI) before and after the lighting intervention. Additionally rest-activity cycles were continuously monitored for 6 months by a wrist worn activity watch. Analysis of CMAI data was performed by using the Wilcoxon-Test for matched pairs (before vs. after the lighting installation). Rest-activity data was compared with t-tests for dependent samples. The dynamic lighting significantly reduced the CMAI sum-scores from 30.2±5.1 to 27.9±2.6 (mean ± SD; N = 12; p<0.05). Analysis of the CMAI subscores revealed that under the dynamic lighting mainly non-physically aggressive behaviors were reduced.

RESULTS: Results from the rest-activity analysis did not show differences of circadian amplitude and other circadian variables before and after the lighting installation. The dynamic lighting in the living room significantly reduced agitated behavior in demented patients, indicating short-term benefits from higher daily light exposures. Whether such lighting also impacts long-term (circadian) rest-activity cycles needs to be further investigated.

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Implementation of Dynamic Lighting in a Nursing Home: Impact on Agitation but not on Rest-Activity Patterns

Abstract

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