Evidence map›Paper›PMID 33472602›Full record

SynthesisBMC pulmonary medicine2021

Serum bilirubin and chronic obstructive pulmonary disease (COPD): a systematic review.

David M MacDonald, Ken M Kunisaki, Timothy J Wilt, Arianne K Baldomero

Open access · goldAbstract readSystematic Review
In one paragraph

Synthesis in BMC pulmonary medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.0field-weighted citation impact, top 26% 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

12 citing papers in PubMed, 16 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

4 authors at 1 institution in 1 country.

David M MacDonaldDivision of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Minnesota, Suite 350, VCRC, 401 East River Road, Minneapolis, MN, 55455, USA. macdo147@umn.edu.ORCID http://orcid.org/0000-0003-4489-1872
Ken M KunisakiDivision of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Minnesota, Suite 350, VCRC, 401 East River Road, Minneapolis, MN, 55455, USA.
Timothy J WiltCenter for Care Delivery and Outcomes Research and the Section of General Medicine, Minneapolis Veterans Affairs Health Care System, Minneapolis, MN, USA.
Arianne K BaldomeroDivision of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Minnesota, Suite 350, VCRC, 401 East River Road, Minneapolis, MN, 55455, USA.
University of Minnesota · US

Funding

University of Minnesota Clinical and Translational Science Institute (UMN CTSI)UL1TR002494 · NCATS · UNIVERSITY OF MINNESOTA · PI BLAZAR, BRUCE R, WEISDORF, DANIEL J · 2018 to 2022
$34.9M
TRAINING-PULMONARY CELL &MOLECULAR BIOLOGY &PHYSIOLOGYT32HL007741 · NHLBI · UNIVERSITY OF MINNESOTA TWIN CITIES · PI DUDLEY, R. ADAMS, INGBAR, DAVID H · 1994 to 2023
$13.9M
Institutional Career Development CoreKL2TR002492 · NCATS · UNIVERSITY OF MINNESOTA · PI INGBAR, DAVID H · 2018 to 2022
$6.3M
NCATS NIH HHS KL2 TR002492NCATS NIH HHS KL2TR002492NCATS NIH HHS UL1 TR002494NCATS NIH HHS UL1TR002494NHLBI NIH HHS 2T32HL007741-26A1NHLBI NIH HHS T32 HL007741
6 · The paper itself

Abstract

backgroundBilirubin is a potent antioxidant and higher serum bilirubin levels have been associated with improved COPD outcomes. We performed a systematic review to evaluate the association between serum bilirubin levels and lung function (FEV

methodsMEDLINE® and Embase were searched using Ovid® (search updated October 1st, 2019). We included studies that measured serum bilirubin levels and outcomes of interest in adults with or without underlying lung disease. We excluded studies of those with liver disease or drug-induced elevations in bilirubin. We used the Newcastle-Ottawa scale to assess individual study risk of bias (ROB) and the US Agency for Healthcare Research and Quality-Evidence Based Practice tool to assess overall strength of evidence (SOE). Two authors independently determined eligibility, performed data abstraction, assessed ROB, and determined SOE.

resultsThirteen studies (5 low risk of bias, 3 moderate and 5 high risk) were included. We found low strength of evidence for the association between higher bilirubin levels and lower risk of acute exacerbations of COPD (2 studies), mortality (3 studies), COPD diagnosis (4 studies), and lung function (FEV

conclusionHigher bilirubin levels may be associated with lower mortality and improved COPD outcomes. Randomized trials are needed to evaluate the effect of medications that raise serum bilirubin on COPD outcomes. PROSPERO registration: CRD42019145747.

Indexed as

AntioxidantsBilirubinDisease ProgressionHumansPulmonary Disease, Chronic ObstructiveRespiratory Function TestsAntioxidantsBilirubinAntioxidantsBilirubinPulmonary disease, chronic obstructiveSystematic review

Identifiers

PMID33472602
PMCPMC7816373
OpenAlexW3125197812

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.