Evidence map›Paper›PMID 33386232›Full record

ArticleThe Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation2021

Bridging the survival gap in cystic fibrosis: An investigation of lung transplant outcomes in Canada and the United States.

Anne L Stephenson, Kathleen J Ramos, Jenna Sykes, Xiayi Ma, Sanja Stanojevic, Bradley S Quon, Bruce C Marshall, Kristofer Petren, Joshua S Ostrenga, Aliza K Fink and 4 more

Abstract readMulticenter Study
In one paragraph

Article in The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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

14 citing papers in PubMed.

  1. Article
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  3. Linkage of the CF Foundation Patient Registry with the Scientific Registry of Transplant Recipients database.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2025
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  4. Article
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  10. Survival difference between high-risk and low-risk CFTR genotypes after lung transplant.The Journal of heart and lung transplantation : the official publication of the International Society for Heart Transplantation · 2022
    Article
  11. Article
  12. Low body mass index as a barrier to lung transplant in cystic fibrosis.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2022
    Article
  13. A Framework for Using Real-World Data and Health Outcomes Modeling to Evaluate Machine Learning-Based Risk Prediction Models.Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research · 2022
    Article
  14. 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

14 authors.

Anne L StephensonDepartment of Respirology, St Michael's Hospital, Toronto, Ontario, Canada; Keenan Research Centre, Li Ka Shing Knowledge Institute, St Michael's Hospital, Toronto, Ontario, Canada; Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada. Electronic address: anne.stephenson@unityhealth.to.
Kathleen J RamosDivision of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington Medical Center, Seattle, Washington.
Jenna SykesDepartment of Respirology, St Michael's Hospital, Toronto, Ontario, Canada.
Xiayi MaDepartment of Respirology, St Michael's Hospital, Toronto, Ontario, Canada.
Sanja StanojevicDepartment of Community Health and Epidemiology, Dalhousie University, Halifax, Nova Scotia, Canada.
Bradley S QuonCentre for Heart Lung Innovation, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada.
Bruce C MarshallCystic Fibrosis Foundation, Bethesda, Maryland.
Kristofer PetrenCystic Fibrosis Foundation, Bethesda, Maryland.
Joshua S OstrengaCystic Fibrosis Foundation, Bethesda, Maryland.
Aliza K FinkCystic Fibrosis Foundation, Bethesda, Maryland.
Albert FaroCystic Fibrosis Foundation, Bethesda, Maryland.
Alexander ElbertCystic Fibrosis Foundation, Bethesda, Maryland.
Cecilia ChaparroDepartment of Respirology, St Michael's Hospital, Toronto, Ontario, Canada; Toronto Lung Transplant Program, University Health Network, Toronto, Ontario, Canada.
Christopher H GossDivision of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington Medical Center, Seattle, Washington; Division of Pediatric Pulmonary, Department of Pediatrics, University of Washington Medical Center, Seattle, Washington.

Funding

Translational Research Center to Expedite Novel Therapies in Cystic FibrosisP30DK089507 · NIDDK · SEATTLE CHILDREN'S HOSPITAL · PI Christopher Hooper Goss · 2010 to 2026
$21.4M
Proof of Principle Evaluation of IV Gallium Nitrate in Patients with CFUM1HL119073 · NHLBI · UNIVERSITY OF WASHINGTON · PI GOSS, CHRISTOPHER HOOPER, SINGH, PRADEEP K · 2013 to 2017
$4.8M
Early Intervention in Pulmonary Exacerbation in CFR01HL103965 · NHLBI · UNIVERSITY OF WASHINGTON · PI GOSS, CHRISTOPHER HOOPER, LECHTZIN, NOAH · 2010 to 2014
$3.8M
Investigating treatment resistance mechanisms in chronic bacterial infectionsR01AI101307 · NIAID · UNIVERSITY OF WASHINGTON · PI BRUCE, JAMES EDWARD, MANOIL, COLIN · 2012 to 2016
$2.9M
Regulation of host inflammatory responses and outcome in melioidosis by TLR5R01HL113382 · NHLBI · UNIVERSITY OF WASHINGTON · PI WEST, TIMOTHY EOIN · 2012 to 2016
$2.6M
Phase 2 Study of Intravenous Gallium Nitrate in the Treatment of Cystic FibrosisR01FD003704 · FDA · UNIVERSITY OF WASHINGTON · PI GOSS, CHRISTOPHER HOOPER · 2009 to 2018
$2.0M
Predicting survival and planning for lung transplantation in severe cystic fibrosisK23HL138154 · NHLBI · UNIVERSITY OF WASHINGTON · PI RAMOS, KATHLEEN JESSICA · 2017 to 2021
$947k
FDA HHS R01 FD003704NHLBI NIH HHS K23 HL138154NHLBI NIH HHS R01 HL103965NHLBI NIH HHS R01 HL113382NHLBI NIH HHS UM1 HL119073NIAID NIH HHS R01 AI101307NIDDK NIH HHS P30 DK089507
6 · The paper itself

Abstract

backgroundPrevious literature in cystic fibrosis (CF) has shown a 10-year survival gap between Canada and the United States (US). We hypothesized that differential access to and survival after lung transplantation may contribute to the observed gap. The objectives of this study were to compare CF transplant outcomes between Canada and the US and estimate the potential contribution of transplantation to the survival gap.

methodsData from the Canadian CF Registry and the US Cystic Fibrosis Foundation Patient Registry supplemented with data from United Network for Organ Sharing were used. The probability of surviving after transplantation between 2005 and 2016 was calculated using the Kaplan‒Meier method. Survival by insurance status at the time of transplantation and transplant center volume in the US were compared with those in Canada using Cox proportional hazard models. Simulations were used to estimate the contribution of transplantation to the survival gap.

resultsBetween 2005 and 2016, there were 2,653 patients in the US and 470 in Canada who underwent lung transplantation for CF. The 1-, 3-, and 5-year survival rates were 88.3%, 71.8%, and 60.3%, respectively, in the US compared with 90.5%, 79.9%, and 69.7%, respectively, in Canada. Patients in the US were also more likely to die on the waitlist (p < 0.01) than patients in Canada. If the proportion of who underwent transplantation and post-transplant survival in the US were to increase to those observed in Canada, we estimate that the survival gap would decrease from 10.8 years to 7.5 years.

conclusionsDifferences in waitlist mortality and post-transplant survival can explain up to a third of the survival gap observed between the US and Canada.

Indexed as

RegistriesAdolescentAdultCanadaChildCystic FibrosisFemaleHumansLung TransplantationMaleProspective StudiesRisk FactorsSurvival RateUnited StatesWaiting ListsYoung Adultcystic fibrosisepidemiologyinternational comparisonssurvivaltransplantation

Identifiers

PMID33386232
PMCPMC7925420

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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.