Evidence map›Paper›PMID 33451329›Full record

ArticleRespiratory research2021

The product of trunk muscle area and density on the CT image is a good indicator of energy expenditure in patients with or at risk for COPD.

Toru Shirahata, Hideaki Sato, Sanehiro Yogi, Kaiji Inoue, Mamoru Niitsu, Tomoe Akagami, Machika Soma, Tomohiko Mio, Makoto Nagata, Satoshi Nakae and 4 more

Open access · goldAbstract read
In one paragraph

Article in Respiratory research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
1.3field-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

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

  1. Pooled it
  2. Article
  3. Article
  4. Observational
  5. Article
  6. Medical nutrition therapy in chronic obstructive pulmonary disease: A narrative review.Nutrition in clinical practice : official publication of the American Society for Parenteral and Enteral Nutrition · 2025
    Review
  7. Article
  8. Review
  9. Effect of Common Medications on Longitudinal Pectoralis Muscle Area in Smokers.Chronic obstructive pulmonary diseases (Miami, Fla.) · 2025
    Article
  10. Article
  11. Article
  12. The role of diet and nutrition in the management of COPD.European respiratory review : an official journal of the European Respiratory Society · 2023
    Review
  13. Article
  14. 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

14 authors at 5 institutions in 1 country.

Toru ShirahataDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan. t.shirahata+doctor@gmail.com.ORCID http://orcid.org/0000-0002-8975-6618
Hideaki SatoDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Sanehiro YogiDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Kaiji InoueDepartment of Radiology, Saitama Medical University, Saitama, Japan.
Mamoru NiitsuDepartment of Radiology, Saitama Medical University, Saitama, Japan.
Tomoe AkagamiDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Machika SomaDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Tomohiko MioDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Makoto NagataDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Satoshi NakaeDepartment of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan.
Yuki NishidaDepartment of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan.
Shigeho TanakaDepartment of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan.
Fuminori KatsukawaSports Medicine Research Center, Keio University, Yokohama, Japan.
Hidetoshi NakamuraDepartment of Respiratory Medicine, Saitama Medical University, 38 Morohongo, Moroyama-machi, Iruma-gun, Saitama, 350-0495, Japan.
Saitama Medical University · JPNational Institute of Biomedical Innovation, Health and Nutrition · JPKagawa Nutrition University · JPKeio University · JPSaitama Medical University Hospital · JP

Funding

Japan Agency for Medical Research and Development JP17ek0210045 and JP20ek0210112
6 · The paper itself

Abstract

backgroundPhysical inactivity due to cachexia and muscle wasting is well recognized as a sign of poor prognosis in chronic obstructive pulmonary disease (COPD). However, there have been no reports on the relationship between trunk muscle measurements and energy expenditure parameters, such as the total energy expenditure (TEE) and physical activity level (PAL), in COPD. In this study, we investigated the associations of computed tomography (CT)-derived muscle area and density measurements with clinical parameters, including TEE and PAL, in patients with or at risk for COPD, and examined whether these muscle measurements serve as an indicator of TEE and PAL.

methodsThe study population consisted of 36 male patients with (n = 28, stage 1-4) and at risk for (n = 8) COPD aged over 50 years. TEE was measured by the doubly labeled water method, and PAL was calculated as the TEE/basal metabolic rate estimated by the indirect method. The cross-sectional areas and densities of the pectoralis muscles, rectus abdominis muscles, and erector spinae muscles were measured. We evaluated the relationship between these muscle measurements and clinical outcomes, including body composition, lung function, muscle strength, TEE, and PAL.

resultsAll the muscle areas were significantly associated with TEE, severity of emphysema, and body composition indices such as body mass index, fat-free mass, and trunk muscle mass. All trunk muscle densities were correlated with PAL. The product of the rectus abdominis muscle area and density showed the highest association with TEE (r = 0.732) and PAL (r = 0.578). Several trunk muscle measurements showed significant correlations with maximal inspiratory and expiratory pressures, indicating their roles in respiration.

conclusionsCT-derived measurements for trunk muscles are helpful in evaluating physical status and function in patients with or at risk for COPD. Particularly, trunk muscle evaluation may be a useful marker reflecting TEE and PAL.

Indexed as

AgedEnergy MetabolismExerciseFemaleForced Expiratory VolumeHumansMaleMiddle AgedMuscle, SkeletalMuscle StrengthPulmonary Disease, Chronic ObstructiveRisk FactorsTomography, X-Ray ComputedChronic obstructive pulmonary diseaseComputed tomographyEnergy expenditurePhysical activity levelTrunk muscle

Identifiers

PMID33451329
PMCPMC7811265
OpenAlexW3123393167

What OpenQuestion holds

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LicenceCC BY
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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.