Evidence map›Paper›PMID 29997934›Full record

ArticleJournal of thoracic disease2018

Lung volume reduction surgery does not increase daily physical activity in patients with severe chronic obstructive pulmonary disease.

Noriane A Sievi, Daniel Franzen, Malcolm Kohler, Christian F Clarenbach

Abstract read
In one paragraph

Article in Journal of thoracic disease, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed, 1 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

1 citing paper in PubMed, 1 synthesis or guideline pooled it.

  1. Extrapulmonary effects of lung volume reduction in severe emphysema: a systematic review.European respiratory review : an official journal of the European Respiratory Society · 2025
    Pooled it
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

4 authors.

Noriane A SieviDivision of Pulmonary, University Hospital of Zurich, Zurich, Switzerland.
Daniel FranzenDivision of Pulmonary, University Hospital of Zurich, Zurich, Switzerland.
Malcolm KohlerDivision of Pulmonary, University Hospital of Zurich, Zurich, Switzerland.
Christian F ClarenbachDivision of Pulmonary, University Hospital of Zurich, Zurich, Switzerland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLung volume reduction surgery (LVRS) is a treatment option for selected patients with severe chronic obstructive pulmonary disease (COPD) and emphysema. The positive effects of LVRS on exercise capacity are well known. In contrast, the effect of LVRS on daily physical activity (PA) is less clear.

methodsIn a prospective case-control study we evaluated selected patients with severe COPD and emphysema who underwent LVRS and COPD patients following usual care. Controls were matched for age, severity of airflow obstruction (FEV

resultsA total of 19 patients underwent LVRS and 16 COPD patients without a surgical intervention during the study period were included. The median (quartile) FEV

conclusionsThe results from this study reveal that patients undergoing LVRS did not increase their daily level of PA despite improvement of exercise capacity and symptoms.

Indexed as

Activity monitorchronic obstructive pulmonary disease (COPD)exercise capacitylung volume reduction surgery (LVRS)physical activity level (PAL)

Identifiers

PMID29997934
PMCPMC6006130

What OpenQuestion holds

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Registered trials

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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.