Evidence map›Paper›PMID 26970287›Full record

ArticleAmerican journal of hypertension2016

Higher Blood Pressure Partially Links Greater Adiposity to Reduced Brain White Matter Integrity.

Ben Allen, Matthew F Muldoon, Peter J Gianaros, J Richard Jennings

Abstract read
In one paragraph

Article in American journal of hypertension, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed.

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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

4 authors.

Ben AllenUniversity of Pittsburgh, Pittsburgh, Pennsylvania, USA. (bababen@gmail.com.
Matthew F MuldoonUniversity of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Peter J GianarosUniversity of Pittsburgh, Pittsburgh, Pennsylvania, USA.
J Richard JenningsUniversity of Pittsburgh, Pittsburgh, Pennsylvania, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdiposity and elevated blood pressure (BP) are associated with brain structure abnormalities, but whether these effects are independent is unknown. We tested whether associations between adiposity and white matter integrity were explained by elevated BP.

methodsA sample of 209 middle-aged adults underwent diffusion tensor imaging to quantify indirect metrics of white matter structural integrity. These included putative markers of global white matter integrity (fractional anisotropy (FA)), axonal integrity (axial diffusivity), and myelin integrity (radial diffusivity). Participants were either normotensive or prehypertensive.

resultsAfter adjusting for age and sex, regression analyses showed that waist circumference was associated with FA (β = -0.15, P < 0.05) and axial diffusivity (β = -0.24, P < 0.001), and mean arterial pressure (MAP) was associated with FA (β = -0.21, P < 0.05). Direct and indirect effect analyses showed that waist circumference was indirectly associated with whole brain FA through MAP (β = -0.06), and directly related to whole brain axial diffusivity, independent of MAP (β = -0.24). Examination of specific white matter tracts yielded similar results; waist circumference was indirectly related to FA through MAP and radial diffusivity, and directly related to axial diffusivity, independent of MAP. Supplemental analyses using body mass index, systolic BP, and diastolic BP also yielded similar results.

conclusionThese findings suggest at least 2 mechanisms explain the adiposity and white matter association: one pathway through elevated BP impacting global white matter integrity and reducing integrity of the myelin sheath, and at least one other adiposity-specific pathway decreasing axonal integrity.

Indexed as

AdiposityDiffusion Tensor ImagingAdultFemaleHumansHypertensionMaleMiddle AgedWhite Matteradiposityblood pressurediffusion tensor imaginghypertensionwhite matter.

Identifiers

PMID26970287
PMCPMC5661494

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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.