Evidence map›Paper›PMID 28993708›Full record

ArticleInternational journal of obesity (2005)2018

Body mass index is associated with cortical thinning with different patterns in mid- and late-life.

M E Shaw, P S Sachdev, W Abhayaratna, K J Anstey, N Cherbuin

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Article in International journal of obesity (2005), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

44 citing papers in PubMed.

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  13. Interactive Relations of Body Mass Index, Cardiorespiratory Fitness, and Sex to Cognitive Function in Older Adults.Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

M E ShawANU College of Engineering & Computer Science, The Australian National University, Canberra, Australia.
P S SachdevCentre for Healthy Brain Ageing, Neuropsychiatric Institute, University of New South Wales, Sydney, Australia.
W AbhayaratnaCentre for Research on Ageing, Health and Wellbeing, The Australian National University, Canberra, Australia.
K J AnsteyCentre for Research on Ageing, Health and Wellbeing, The Australian National University, Canberra, Australia.
N CherbuinCentre for Research on Ageing, Health and Wellbeing, The Australian National University, Canberra, Australia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveHigh BMI at midlife is associated with increased risk of dementia as well as faster decline in cognitive function. In late-life, however, high BMI has been found to be associated with both increased and decreased dementia risk. The objective of this study was to investigate the neural substrates of this age-related change in body mass index (BMI) risk.

methodsWe measured longitudinal cortical thinning over the whole brain, based on magnetic resonance imaging scans for 910 individuals aged 44-66 years at baseline. Subjects were sampled from a large population study (PATH, Personality and Total Health through Life). After attrition and exclusions, the final analysis was based on 792 individuals, including 387 individuals aged 60-66 years and 405 individuals aged 44-49 years. A mixed-effects model was used to test the association between cortical thinning and baseline BMI, as well as percentage change in BMI.

resultsIncreasing BMI was associated with increased cortical thinning in posterior cingulate at midlife (0.014 mm kg

conclusionsThe pattern of cortical thinning-in association with increasing BMI at both midlife and late-life-is consistent with known obesity-related dementia risk. Increased cortical thinning in association with decreasing BMI at late-life may help explain the 'obesity paradox', where high BMI in midlife appears to be a risk factor for dementia, but high BMI in late-life appears, at times, to be protective.

Indexed as

AdultAgedAgingBody Mass IndexCerebral CortexFemaleHumansLongitudinal StudiesMaleMiddle AgedObesityOrgan SizeRisk Factors

Identifiers

PMID28993708

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.