Evidence map›Paper›PMID 34025121›Full record

ArticleInternational journal of chronic obstructive pulmonary disease

Chronic Obstructive Pulmonary Disease (COPD) in Population Studies in Russia and Norway: Comparison of Prevalence, Awareness and Management.

Sarah Cook, Anne Elise Eggen, Laila A Hopstock, Sofia Malyutina, Marina Shapkina, Alexander V Kudryavtsev, Hasse Melbye, Jennifer K Quint

Open access · goldAbstract read
In one paragraph

Article in International journal of chronic obstructive pulmonary disease. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 25% 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

2 citing papers in PubMed, 1 synthesis or guideline pooled it, 6 citations in OpenAlex.

  1. Pooled it
  2. Awareness of COPD and Its Risk Factors Among the Adult Population of the Aseer Region, Saudi Arabia.International journal of chronic obstructive pulmonary disease · 2023
    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

8 authors at 6 institutions in 3 countries.

Sarah CookDepartment of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.ORCID 0000-0003-1250-2967
Anne Elise EggenDepartment of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.
Laila A HopstockDepartment of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.
Sofia MalyutinaResearch Institute of Internal and Preventive Medicine, Branch of Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation.
Marina ShapkinaResearch Institute of Internal and Preventive Medicine, Branch of Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation.
Alexander V KudryavtsevDepartment of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.ORCID 0000-0001-8902-8947
Hasse Melbye *Department of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway.ORCID 0000-0002-9773-3141
Jennifer K Quint *National Heart and Lung Institute, Imperial College London, London, UK.ORCID 0000-0003-0149-4869
UiT The Arctic University of Norway · NOImperial College London · GBInstitute of Cytology and Genetics · RULondon School of Hygiene & Tropical Medicine · GBNorthern State Medical University · RUNovosibirsk State Medical University · RU

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundChronic obstructive pulmonary disease (COPD) is a major cause of morbidity and mortality worldwide. Despite a high prevalence of smoking and respiratory symptoms, two recent population-based studies in Russia found a relatively low prevalence of obstructive lung function. Here, we investigated the prevalence of both obstructive lung disease and respiratory symptoms in a population-based study conducted in two Russian cities and compared the findings with a similar study from Norway conducted in the same time period.

methodsThe study population was a sub-sample of participants aged 40-69 years participating in the Know Your Heart (KYH) study in Russia in 2015-18 (n=1883) and in the 7th survey of the Tromsø Study (n=5271) carried out in Norway in 2015-16 (Tromsø 7) who participated in spirometry examinations. The main outcome was obstructive lung function (FEV

resultsThe age-standardized prevalence of obstructive lung function was similar among men in both studies (KYH 11.0% vs Tromsø 7 9.8%, p=0.21) and higher in the Norwegian (9.4%) than Russian (6.8%) women (p=0.006). In contrast, the prevalence of obstructive lung function plus respiratory symptoms was higher in Russian men (KYH 8.3% vs Tromsø 7 4.7%, p<0.001) but similar in women (KYH 5.9% vs Tromsø 7 6.4%, p=0.18). There was a much higher prevalence of respiratory symptoms in Russian than Norwegian participants of both sexes regardless of presence of obstructive lung function.

conclusionThe prevalence of respiratory symptoms was strikingly high among Russian participants but this was not explained by a higher burden of obstructive lung function on spirometry testing in comparison with Norwegian participants. Further work is needed to understand the reasons and health implications of this high prevalence of cough and breathlessness.

Indexed as

Pulmonary Disease, Chronic ObstructiveCross-Sectional StudiesFemaleForced Expiratory VolumeHumansMaleNorwayPrevalenceRisk FactorsRussiaSpirometryCOPDNorwayrespiratory symptomsRussian Federation

Identifiers

PMID34025121
PMCPMC8132463
OpenAlexW3162486942

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.