Evidence map›Paper›PMID 37828634›Full record

ArticleChronic obstructive pulmonary diseases (Miami, Fla.)2024

COPD and Smoking Status - It Does Matter: Characteristics and Prognosis of COPD According to Smoking Status.

Anne O Nielsen, Peter Lange, Ole Hilberg, Ingeborg Farver-Vestergaard, Rikke Ibsen, Anders Løkke

Abstract read
In one paragraph

Article in Chronic obstructive pulmonary diseases (Miami, Fla.), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. The impact of body mass index on mortality in COPD: an updated dose-response meta-analysis.European respiratory review : an official journal of the European Respiratory Society · 2024
    Pooled it
  3. Article
  4. Characterization of Patients with COPD and GOLD E Classification in the United States.International journal of chronic obstructive pulmonary disease · 2026
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Article
  13. Article
  14. Observational
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Observational
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.

Anne O NielsenDepartment of Pulmonary Medicine, North Zealand Hospital Hillerød, Copenhagen, Denmark.
Peter LangeDepartment of Pulmonary Medicine, Herlev/Gentofte Hospital, Copenhagen, Denmark.
Ole HilbergDepartment of Medicine, Hospital Little Belt, Vejle, Denmark.
Ingeborg Farver-VestergaardDepartment of Medicine, Hospital Little Belt, Vejle, Denmark.
Rikke IbsenDepartment of Regional Health Research, University of Southern Denmark, Odense, Denmark.
Anders LøkkeDepartment of Medicine, Hospital Little Belt, Vejle, Denmark.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Chronic obstructive pulmonary disease is a chronic, often progressive disease, which in most patients is caused by tobacco smoking. Our study focuses on differences in COPD-related outcomes between never smokers, former smokers, and current smokers. Methods: A nationwide, population-based cohort study utilizing Danish health registries. Clinical and socioeconomic variables including smoking status, comorbidities, and dyspnea were obtained. Poisson and Cox Regression were used to calculate the impact of these clinical parameters on the risk of moderate and severe exacerbations and mortality during 12 months of follow-up. Results: A total of 49,826 patients ≥40 years of age, with a hospital diagnosis of COPD in 2008-2017, were identified (mean age 69.2 years, 52% females). A total of 2127 (4%) were never smokers, 29,854 (60%) were former smokers and 17,845 (36%) current smokers. Compared to former and current smokers, never smokers reported a lower modified Medical Research Council score and had a milder COPD stage according to the Global Initiative for Chronic Obstructive Lung Disease classification. During follow-up, never smokers had a significantly lower risk of severe exacerbations (hazard ratio 0.87, 95% confidence interval [CI] 0.78-0.97) and a lower rate of death (mortality ratio 0.75, 95% CI 0.70-0.81) compared to patients with a smoking history. Discussion: Our nationwide study showed that COPD in never smokers is characterized by a lower level of dyspnea, milder lung function impairment, and a lower risk of exacerbations and death. At the same time, we found active smokers to have the highest risk. These findings highlight the need for campaigns to prevent smoking and may help general practitioners as well as other health care professionals to motivate patients with COPD to stop smoking.

Indexed as

COPDexacerbationsnever-smokersprognosissmoking

Identifiers

PMID37828634
PMCPMC10913926

What OpenQuestion holds

Textmetadata
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.