Dementia and Physical Activity (DAPA) - an exercise intervention to improve cognition in people with mild to moderate dementia: Study protocol for a randomized controlled trial

Nicky Atherton, Chris Bridle, Deborah Brown, Helen Collins, Sukhdeep Dosanjh, Frances Griffiths, Susie Hennings, Kamran Khan, Ranjit Lall, Samantha Lyle, Rupert McShane, Dipesh Mistry, Vivien Nichols, Stavros Petrou, Bart Sheehan, Anne Marie Slowther, Margaret Thorogood, Emma Withers, Peter Zeh, Sarah E. Lamb

Research output: Contribution to journalArticle

9 Citations (Scopus)
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Abstract

BACKGROUND:
Dementia is more common in older than in younger people, and as a result of the ageing of the population in developed countries, it is becoming more prevalent. Drug treatments for dementia are limited, and the main support offered to people with dementia and their families is generally services to mitigate against loss of function. Physical exercise is a candidate non-pharmacological treatment for dementia.

METHODS/DESIGN:
DAPA is a randomised controlled trial funded by the National Institute for Health Research Health Technology Assessment programme to estimate the effect of a 4-month, moderate- to hard-intensity exercise training programme and subsequent advice to remain active, on cognition (primary outcome) at 12 months in people with mild to moderate dementia. Community-dwelling participants (with their carers where possible), who are able to walk 3 metres without human assistance, able to undertake an exercise programme and do not have any unstable or terminal illness are recruited. Participants are then randomised by an independent statistician using a computerised random number generator to usual care or exercise at a 2:1 ratio in favour of exercise. The exercise intervention comprises 29, 1-hour-long exercise classes, run twice weekly at suitable venues such as leisure centres, which include aerobic exercise (on static bikes) and resistance exercise (using weights). Goals for independent exercise are set while the classes are still running, and supported thereafter with phone calls. The primary outcome is measured using ADAS-cog. Secondary outcome measures include behavioural symptoms, functional ability, quality of life and carer burden. Primary and secondary outcomes will be measured at baseline and at 6 and 12 months after randomisation, by researchers masked to participant randomisation in the participants' own homes. An economic evaluation will be carried out in parallel to the RCT, as will a qualitative study capturing the experiences of participants, carers and staff delivering the intervention.

DISCUSSION:
The DAPA study will be the first large, randomised trial of the cognitive effects of exercise on people with dementia. The intervention is designed to be capable of being delivered within the constraints of NHS service provision, and the economic evaluation will allow assessment of its cost-effectiveness.
Original languageEnglish
Article number165
Pages (from-to)1-12
Number of pages12
JournalTrials
Volume17
DOIs
Publication statusPublished - 25 Mar 2016
Externally publishedYes

Bibliographical note

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Keywords

  • Dementia
  • Exercise
  • Randomised controlled trial

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Pharmacology (medical)

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