Evidence map›Paper›PMID 34627008›Full record

ArticleRespiratory medicine

COPD is a risk factor for COVID-19, but does not confer increased severity of the disease.

Jae Seok Jeong, Jong Seung Kim, Yeon Seok You, Sang Woo Yeom, Yong Chul Lee

Open access · hybridAbstract readLetter
PubMed Full text at PMC Publisher
In one paragraph

Article in Respiratory medicine. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
1.0field-weighted citation impact, top 21% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 19 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Observational
  4. Loss of Lung Function Led to Loss of Life during the COVID-19 Pandemic.American journal of respiratory and critical care medicine · 2025
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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

5 authors at 2 institutions in 1 country.

Jae Seok JeongDepartment of Internal Medicine, Research Center for Pulmonary Disorders, Jeonbuk National University Medical School, Jeonju, South Korea; Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea.
Jong Seung KimDepartment of Otorhinolaryngology-Head and Neck Surgery, Jeonbuk National University Medical School, Jeonju, South Korea; Department of Medical Informatics, Jeonbuk National University, Jeonju, South Korea; Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea.
Yeon Seok YouDepartment of Otorhinolaryngology-Head and Neck Surgery, Jeonbuk National University Medical School, Jeonju, South Korea.
Sang Woo YeomDepartment of Medical Informatics, Jeonbuk National University, Jeonju, South Korea.
Yong Chul LeeDepartment of Internal Medicine, Research Center for Pulmonary Disorders, Jeonbuk National University Medical School, Jeonju, South Korea; Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea. Electronic address: leeyc@jbnu.ac.kr.
Jeonbuk National University Hospital · KRJeonbuk National University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Epidemiologic studies suggest that COPD is associated with an increased risk of poor outcome in patients with COVID-19, although they failed to demonstrate COPD as a risk factor for acquiring COVID-19. However, most data have come from a limited global population. In this nationwide cohort study based on the Korean national health insurance claims-based database, COPD is associated with increased risk for COVID-19 and having COPD does not seem to confer substantial risk for severe COVID-19 and mortality. These findings indicate that heterogeneity in the populations across many countries may complicate the net effects of COPD on the COVID-19-related outcomes.

Indexed as

COVID-19Patient AcuityPulmonary Disease, Chronic ObstructiveAgedCohort StudiesDatabases, FactualFemaleHumansMaleMiddle AgedNational Health ProgramsPrognosisRepublic of KoreaRisk FactorsCOPDCOVID-19National health insurance serviceSevere acute respiratory syndrome coronavirus 2

Identifiers

PMID34627008
PMCPMC8492002
OpenAlexW3161053298

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.