Evidence map›Paper›PMID 26928024›Full record

ArticleBMJ open2016

Effect of obesity on cognition in adults with and without a mood disorder: study design and methods.

Maria R Restivo, Margaret C McKinnon, Benicio N Frey, Geoffrey B Hall, Valerie H Taylor

Abstract read
In one paragraph

Article in BMJ open, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

11 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

5 authors.

Maria R RestivoDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada.
Margaret C McKinnonDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada.
Benicio N FreyDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada.
Geoffrey B HallDepartment of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada.
Valerie H TaylorDepartment of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, Ontario, Canada Women's College Research Institute, Women's College Hospital, Toronto, Ontario, Canada Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

introductionObesity is a common medical illness that is increasingly recognised as conferring risk of decline in cognitive performance, independent of other comorbid medical conditions. Individuals with mood disorders (bipolar disorder (BD) or major depressive disorder (MDD)) display an increased prevalence of both obesity and risk factors for cardiovascular diseases. Moreover, BD and MDD are associated with impairment in cognitive functioning across multiple domains. The independent contribution of obesity to cognitive decline in this population has not been explored. This study examines the impact of obesity on cognition by comparing neuropsychological performance in obese individuals, with or without a mood disorder before and after undergoing bariatric surgery. METHODS AND ANALYSIS: This study compares measures of declarative memory, executive functioning and attention in obese individuals (body mass index >35 kg/m(2)) with BD or MDD, and 2 control populations (obese individuals without a psychiatric illness and healthy non-obese controls) prior to and following bariatric surgery. Participants (ages 18-60) receive a psychiatric diagnosis via the Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV; SCID). Mood ratings, physical measurements, nutritional and health questionnaires are also administered. A standardised battery of neuropsychological tests aimed at establishing performance in areas of declarative memory, executive functioning and attention are administered. Warrington's Recognition Memory Task (RMT) and an N-Back Task are performed in a 3 T functional MRI to investigate patterns of neural activation during cognitive performance. Additionally, anatomical MRI data are obtained to investigate potential changes in neural structures. Baseline data will be analysed for between-group differences and later compared with postsurgical data to investigate cognitive change. ETHICS AND DISSEMINATION: This study has been approved by the Hamilton Integrated Research Ethics Board (09-3254). Results will be available in peer-reviewed scientific publications and scientific meetings presentations, and released in lay form to media.

Indexed as

CognitionAdolescentAdultAnthropometryAttentionBariatric SurgeryCognition DisordersExecutive FunctionHumansIntelligenceMagnetic Resonance ImagingMiddle AgedMood DisordersNeuropsychological TestsObesityProspective StudiesPSYCHIATRYSURGERY

Identifiers

PMID26928024
PMCPMC4780057

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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.