Evidence map›Paper›PMID 32843499›Full record

ArticleBMJ open diabetes research & care2020

Association between race/ethnicity and the risk of amputation of lower extremities among medicare beneficiaries with diabetic foot ulcers and diabetic foot infections.

Tze-Woei Tan, David G Armstrong, Kirsten C Concha-Moore, David G Marrero, Wei Zhou, Elizabeth Calhoun, Ching-Yuan Chang, Wei-Hsuan Lo-Ciganic

Open access · goldAbstract read
In one paragraph

Article in BMJ open diabetes research & care, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
6.2field-weighted citation impact, top 3% of its field
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

36 citing papers in PubMed, 68 citations in OpenAlex.

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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

8 authors at 4 institutions in 1 country.

Tze-Woei TanUniversity of Arizona Health Sciences Center, Tucson, Arizona, USA ttan@surgery.arizona.edu.ORCID 0000-0002-6658-9482
David G ArmstrongSurgery, University of Southern California, Los Angeles, California, USA.
Kirsten C Concha-MooreSurgery, University of Washington School of Medicine, Seattle, Washington, USA.
David G MarreroUniversity of Arizona Health Sciences Center, Tucson, Arizona, USA.
Wei ZhouUniversity of Arizona Health Sciences Center, Tucson, Arizona, USA.
Elizabeth CalhounUniversity of Arizona Health Sciences Center, Tucson, Arizona, USA.
Ching-Yuan ChangPharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida Health, Gainesville, Florida, USA.
Wei-Hsuan Lo-CiganicPharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida Health, Gainesville, Florida, USA.
University of Arizona · USUniversity of Florida Health · USUniversity of Southern California · USUniversity of Washington · US

Funding

Southern California Clinical and Translational Science InstituteUL1TR001855 · NCATS · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Thomas A Buchanan, Michele D. Kipke · 2016 to 2026
$81.3M
New York Regional Center for Diabetes Translation Research - Translational Intervention Methodology CoreP30DK111022 · NIDDK · ALBERT EINSTEIN COLLEGE OF MEDICINE, INC · PI JEFFREY GONZALEZ · 2016 to 2026
$7.8M
Determinants in Limb Preservation in Hispanics and Native AmericansK23DK122126 · NIDDK · UNIVERSITY OF SOUTHERN CALIFORNIA · PI TAN, TZE-WOEI · 2019 to 2023
$845k
NCATS NIH HHS UL1 TR001855NIDDK NIH HHS K23 DK122126NIDDK NIH HHS P30 DK111022
6 · The paper itself

Abstract

introductionThis study aimed to examine the association of race and ethnicity on the risk of lower extremity amputations among Medicare beneficiaries with diabetic foot ulcers (DFUs) and diabetic foot infections (DFIs). RESEARCH DESIGN AND

methodsA retrospective study included 2011-2015 data of a 5% sample of fee-for-service Medicare beneficiaries with a newly diagnosed DFU and/or DFI. The primary outcome was the time to the first major amputation episode after a DFU and/or DFI were identified using the diagnosis and procedure codes. We used multivariable Cox proportional hazards models to estimate the risk of time to the first major amputation across races, adjusting for sociodemographic and health status factors. Adjusted hazard ratios (aHRs) with a 95% CI were reported.

resultsAmong 92 929 Medicare beneficiaries newly diagnosed with DFUs and/or DFIs, 77% were whites, 14.3% African Americans (AAs), 3.3% Hispanics, 0.7% Native Americans (NAs), and 4.0% were other races. The incidence rates of major amputation were 0.02 person-years for NAs, 0.02 person-years for AAs, 0.01 person-years for Hispanics, 0.01 person-years for other races, and 0.01 person-years for whites (p<0.05). Multivariable analysis showed that AAs (aHR=1.9, 95% CI 1.7 to 2.2, p<0.0001) and NAs (aHR=1.8, 95% CI 1.3 to 2.6, p=0.001) were associated with an increased risk of major amputation compared with whites. Beneficiaries with DFUs and/or DFIs diagnosed by a podiatrist or primary care physician (aHR=0.7, 95% CI 0.6 to 0.8, p<0.0001, specialists as reference) or at an outpatient visit (aHR=0.3, 95% CI 0.3 to 0.3, p<0.0001, inpatient stay as reference) were associated with a decreased risk of major amputation.

conclusionsRacial and ethnic disparities in the risk of lower extremity amputations appear to exist among fee-for-service Medicare beneficiaries with diabetic foot problems. AAs and NAs with DFUs and/or DFIs were associated with an increased risk of major amputations compared with white Medicare beneficiaries.

Indexed as

Diabetes MellitusDiabetic FootAgedAmputation, SurgicalEthnicityHumansLower ExtremityMedicareRetrospective StudiesUnited Statesadministrative dataadult diabeteschronic diabetic complicationsclinical epidemiology

Identifiers

PMID32843499
PMCPMC7449291
OpenAlexW3081067094

What OpenQuestion holds

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LicenceCC BY-NC
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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.