Dataset Information

Modifiable dementia risk score to study heterogeneity in treatment effect of a dementia prevention trial: a post hoc analysis in the preDIVA trial using the LIBRA index.

ABSTRACT:

Background

Selecting high-risk participants for dementia prevention trials based on a modifiable dementia risk score may be advantageous, as it increases the opportunity for intervention. We studied whether a multi-domain intervention can prevent all-cause dementia and cognitive decline in older people across three different levels of a modifiable dementia risk score.

Methods

Prevention of Dementia by Intensive Vascular Care (preDIVA) is a randomised controlled trial studying the effect of multi-domain vascular care during 6-8 years on incident all-cause dementia in community-dwelling people aged 70-78 years. For this post hoc analysis, we stratified preDIVA participants in tertiles based on their baseline LIfestyle for BRAin Health (LIBRA) index, a modifiable dementia risk score. With Cox proportional hazards regression, the intervention effect on dementia was assessed. The effect on cognition was measured every 2 years with the Mini-Mental State Examination and Visual Association Test.

Results

Dementia developed in 220 of 3274 (6.7%) participants. In participants with a low, intermediate and high LIBRA index, the hazard ratio (HR) of the intervention on incident dementia was respectively 0.71 (95% CI 0.45-1.12), 1.06 (95% CI 0.66-1.69) and 1.02 (95% CI 0.64-1.62). Also, when adding the non-modifiable risk factors age, education and sex to the index, results were comparable (respectively HR 0.88, 95% CI 0.54-1.43; HR 0.91, 95% CI 0.57-1.47; HR 0.92, 95% CI 0.59-1.41). There was no statistically significant intervention effect on cognition during follow-up across the LIBRA groups.

Conclusions

In the preDIVA study population aged 70-78 years, the LIBRA modifiable dementia risk score did not identify a (high-)risk group in whom the multi-domain intervention was effective in preventing dementia or cognitive decline.

Trial registration

International Standard Randomised Controlled Trial Number registry, ISRCTN29711771 . Registered on 14 February 2006.

SUBMITTER: van Middelaar T

PROVIDER: S-EPMC6026510 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Publications

Modifiable dementia risk score to study heterogeneity in treatment effect of a dementia prevention trial: a post hoc analysis in the preDIVA trial using the LIBRA index.

van Middelaar Tessa T Hoevenaar-Blom Marieke P MP van Gool Willem A WA Moll van Charante Eric P EP van Dalen Jan-Willem JW Deckers Kay K Köhler Sebastian S Richard Edo E

Alzheimer's research & therapy 20180630 1

<h4>Background</h4>Selecting high-risk participants for dementia prevention trials based on a modifiable dementia risk score may be advantageous, as it increases the opportunity for intervention. We studied whether a multi-domain intervention can prevent all-cause dementia and cognitive decline in older people across three different levels of a modifiable dementia risk score.<h4>Methods</h4>Prevention of Dementia by Intensive Vascular Care (preDIVA) is a randomised controlled trial studying the ...[more]

PMID: 29960597

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Dataset Information

Modifiable dementia risk score to study heterogeneity in treatment effect of a dementia prevention trial: a post hoc analysis in the preDIVA trial using the LIBRA index.

Background

Methods

Results

Conclusions

Trial registration

Publications

Modifiable dementia risk score to study heterogeneity in treatment effect of a dementia prevention trial: a post hoc analysis in the preDIVA trial using the LIBRA index.

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