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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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Aromatherapy for dementia.

Emily L Ball1, Bethan Owen-Booth2,3, Amy Gray4

  • 1Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK.

The Cochrane Database of Systematic Reviews
|August 20, 2020
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Summary
This summary is machine-generated.

Aromatherapy shows no convincing evidence of benefit for dementia symptoms or cognition. Poor study design and reporting limit conclusions, necessitating better-designed future trials for clear results.

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Area of Science:

  • Gerontology
  • Neuroscience
  • Complementary and Alternative Medicine

Background:

  • Dementia medications offer limited efficacy for cognitive decline and behavioral symptoms.
  • Aromatherapy is perceived as a safe complementary therapy for dementia care.
  • Interest exists in aromatherapy's potential to safely manage distressed behaviors in dementia.

Purpose of the Study:

  • To evaluate the efficacy and safety of aromatherapy for individuals with dementia.
  • To assess aromatherapy's impact on cognitive impairment and behavioral and psychological symptoms in dementia.

Main Methods:

  • Systematic review of randomized controlled trials (RCTs) comparing aromatherapy to placebo or usual care.
  • Searched multiple databases including ALOIS, MEDLINE, Embase, PsycINFO, and ClinicalTrials.gov.
  • Included 13 RCTs with 708 participants diagnosed with any dementia subtype.

Main Results:

  • Ten trials assessed agitation, with inconsistent results; four showed no significant effect, one showed benefit.
  • Eight trials assessed behavioral and psychological symptoms in dementia (BPSD), with four reporting significant benefit.
  • Adverse events and secondary outcomes (quality of life, mood, sleep, cognition) were poorly reported or showed no significant effect.

Conclusions:

  • No convincing evidence supports aromatherapy's benefit for people with dementia.
  • Significant limitations due to poor study design, reporting, and heterogeneity hinder definitive conclusions.
  • Future trials require improved design, reporting, and outcome measurement consistency.