Evidence map›Paper›PMID 33766023›Full record

Observational studyRespiratory research2021

Frequency and functional translation of low muscle mass in overweight and obese patients with COPD.

Felipe V C Machado, Martijn A Spruit, Miriam T J Groenen, Sarah Houben-Wilke, Paula P van Melick, Nidia A Hernandes, Annemie M W J Schols, Fabio Pitta, Emiel F M Wouters, Frits M E Franssen

Abstract readObservational Study
In one paragraph

Observational study in Respiratory research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. The Role of Fat-Free Mass in Weight-Related Complications: A Rapid Review and Meta-Analysis.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2026
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. The role of diet and nutrition in the management of COPD.European respiratory review : an official journal of the European Respiratory Society · 2023
    Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
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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

10 authors.

Felipe V C MachadoDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands. felipemachado@ciro-horn.nl.ORCID http://orcid.org/0000-0003-1910-7695
Martijn A SpruitDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.
Miriam T J GroenenDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.
Sarah Houben-WilkeDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.
Paula P van MelickDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.
Nidia A HernandesLaboratory of Research in Respiratory Physiotherapy, Department of Physical Therapy, State University of Londrina, Londrina, Brazil.
Annemie M W J ScholsNUTRIM-School of Nutrition and Translational Research in Metabolism, Maastricht, The Netherlands.
Fabio PittaLaboratory of Research in Respiratory Physiotherapy, Department of Physical Therapy, State University of Londrina, Londrina, Brazil.
Emiel F M WoutersDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.
Frits M E FranssenDepartment of Research and Development, CIRO+, Centre of Expertise for Chronic Organ Failure, 6080 AB Haelen, Hornerheide 1, Postbus 4009, 6085 NM, Horn, The Netherlands.

Funding

GlaxoSmithKline (GB) SCO115406Lung Foundation Netherlands 3.4.10.015
6 · The paper itself

Abstract

backgroundCut offs for fat-free mass index (FFMI) and appendicular skeletal muscle mass index (ASMI) are available for diagnosing low muscle mass in patients with COPD. This study aimed to investigate: (1) the frequency of low muscle mass (FFMI and ASMI) applying different cut-offs and (2) the functional translation (clinical impact) of low muscle mass, in patients with COPD stratified into BMI categories.

methodsPatients with COPD were assessed regarding body composition, exercise capacity, quadriceps muscle strength, symptoms of anxiety and depression, dyspnea and quality of life upon referral to pulmonary rehabilitation. The proportion of patients with low muscle mass was compared among BMI categories. Clinical outcomes between patients with normal and low muscle mass within each BMI category were compared.

results469 patients with COPD were included for analyses. The frequency of patients classified as low FFMI varied significantly according to the choice of cut-off (32 to 54%; P < 0.05), whereas the frequency of patients with low ASMI was 62%. When applying age-gender-BMI-specific cut-offs, 254 patients (54%) were classified as low FFMI. The choice of the cut-off affected the frequency of patients with low muscle mass in all BMI categories. Overweight and obese patients with low muscle mass were more frequently males and presented worse pulmonary function, exercise capacity and muscle strength compared with overweight and obese patients with normal muscle mass.

conclusionsApproximately half of the overweight and obese patients with COPD have low muscle mass when applying age-gender-BMI-specific cut-offs. Low muscle mass is associated with worse functional outcomes in overweight and obese COPD patients.

Indexed as

Body CompositionAgedBody Mass IndexExercise ToleranceFemaleFunctional StatusHumansLungMaleMiddle AgedNetherlandsObesityPrevalenceProspective StudiesPulmonary Disease, Chronic ObstructiveQuadriceps MuscleExercise toleranceObesityPrevalenceQuality of lifeSarcopenia

Identifiers

PMID33766023
PMCPMC7993483

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.