Evidence map›Paper›PMID 33688382›Full record

ArticleCanadian respiratory journal2021

Development and Relevance of Hypercapnia in COPD.

Chirag Dave, Simon Wharton, Rahul Mukherjee, Bandar M Faqihi, Robert A Stockley, Alice M Turner

Open access · goldAbstract read
In one paragraph

Article in Canadian respiratory journal, 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
2.8field-weighted citation impact, top 9% 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, 23 citations in OpenAlex.

  1. Review
  2. Article
  3. The role of extracorporeal COFrontiers in medicine · 2025
    Review
  4. Observational
  5. Article
  6. Observational
  7. Review
  8. Article
  9. Ventilatory neural drive in chronically hypercapnic patients with COPD: effects of sleep and nocturnal noninvasive ventilation.European respiratory review : an official journal of the European Respiratory Society · 2022
    Review
  10. Review
  11. Home Non-Invasive Ventilation in COPD: A Global Systematic Review.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2022
    Article
  12. Review
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

6 authors at 2 institutions in 1 country.

Chirag DaveUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID 0000-0002-6048-9712
Simon WhartonUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID 0000-0001-9391-4335
Rahul MukherjeeUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID 0000-0003-4466-0660
Bandar M FaqihiInstitute of Applied Health Research, University of Birmingham, Birmingham, UK.ORCID 0000-0002-9181-1700
Robert A StockleyUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID 0000-0003-3726-1207
Alice M TurnerUniversity Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID 0000-0002-5947-3254
University Hospitals Birmingham NHS Foundation Trust · GBUniversity of Birmingham · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Identification of patients who may become hypercapnic, or develop acidotic hypercapnic respiratory failure (AHRF), is important in chronic obstructive pulmonary disease (COPD) to avoid hospital admission and select patients for use of home NIV. This study aimed to identify factors associated with presence and development of hypercapnia. Methods: 1224 patients, 637 with COPD and 587 with alpha 1 antitrypsin deficiency (AATD), from 4 previously established patient cohorts, were included in cross-sectional analyses of hypercapnia (PaCO Results: Hypercapnia was 15 times more common in usual COPD than AATD ( Conclusion: Lower FEV

Indexed as

HypercapniaRespiratory InsufficiencyCarbon DioxideCross-Sectional StudiesHumansNoninvasive VentilationPulmonary Disease, Chronic ObstructiveCarbon Dioxide

Identifiers

PMID33688382
PMCPMC7920710
OpenAlexW3132378914

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.