Evidence map›Paper›PMID 28069728›Full record

ArticleCancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology2017

The Obesity Paradox in Survival after Cancer Diagnosis: Tools for Evaluation of Potential Bias.

Elizabeth Rose Mayeda, M Maria Glymour

Abstract readEditorial
In one paragraph

Article in Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
–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

21 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  14. The competing risk of death and selective survival cannot fully explain the inverse cancer-dementia association.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2020
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  18. Body Mass Index Is Associated With All-cause Mortality After THA and TKA.Clinical orthopaedics and related research · 2018
    Article
  19. Article
  20. Explaining the Obesity Paradox: The Association between Body Composition and Colorectal Cancer Survival (C-SCANS Study).Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology · 2017
    Article
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

2 authors.

Elizabeth Rose MayedaDepartment of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California. Elizabeth.Mayeda@ucsf.edu.
M Maria GlymourDepartment of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California.

Funding

Racial Disparities in Alzheimer's Disease and Related Dementias: The Role of Blood Pressure Throughout AdulthoodK99AG053410 · NIA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI MAYEDA, ELIZABETH ROSE · 2016 to 2017
$253k
NIA NIH HHS K99 AG053410
6 · The paper itself

Abstract

The effects of overweight or obesity on survival after cancer diagnosis are difficult to discern based on observational data because these associations reflect the net impact of both causal and spurious phenomena. We describe two sources of bias that might lead to underestimation of the effect of increased body weight on survival after cancer diagnosis: collider stratification bias and heterogeneity in disease bias. Given the mixed evidence on weight status, weight change, and postdiagnosis survival for cancer patients, systematic evaluation of alternative explanations is critical. The plausible magnitudes of these sources of bias can be quantified on the basis of expert knowledge about particular cancer types using simulation tools. We illustrate each type of bias, describe the assumptions researchers need make to evaluate the plausible magnitude of the bias, and provide a simple example of each bias using the setting of renal cancer. Findings from simulations, tailored to specific types of cancer, could help distinguish real from spurious effects of body weight on patient survival. Using these results can improve guidance for patients and providers about the relative importance of weight management after a diagnosis. Cancer Epidemiol Biomarkers Prev; 26(1); 17-20. ©2017 AACR.

Indexed as

Body Mass IndexBiasComputer SimulationConfounding Factors, EpidemiologicFemaleHumansMaleNeoplasmsObesityOverweightPrognosisRisk AssessmentSurvival AnalysisWeight Loss

Identifiers

PMID28069728
PMCPMC5858690

What OpenQuestion holds

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Registered trials

None linked

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.