Reference values of skeletal muscle area for diagnosis of sarcopenia using chest computed tomography in Asian general population

Sung Woo Moon, Sang Hoon Lee, Ala Woo, Ah Young Leem, Su Hwan Lee, Kyung Soo Chung, Eun Young Kim, Ji Ye Jung, Young Ae Kang, Moo Suk Park, Young Sam Kim, Chang Oh Kim, Song Yee Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Background: Diagnostic cutoff points for sarcopenia in chest computed tomography (CT) have not been established although CT is widely used for investigating skeletal muscles. This study aimed to determine reference values for sarcopenia of thoracic skeletal muscles acquired from chest CT scans and to analyse variables related to sarcopenia using the cutoff values determined in a general Asian population. Methods: We retrospectively reviewed chest CT scans of 4470 participants (mean age 54.8 ± 9.9 years, 65.8% male) performed at a check-up centre in South Korea (January 2016–August 2017). To determine cutoffs, 335 participants aged 19–39 years (mean age 35.2 ± 3.6 years, 75.2% male) were selected as the healthy and younger reference group, and 4135 participants aged ≥40 years (mean age 56.4 ± 8.4 years, 65.1% male) were selected as the study group. We measured the following: cross-sectional area (CSA) of the pectoralis, intercostalis, paraspinal, serratus, and latissimus muscles at the 4th vertebral region (T4CSA); T4CSA divided by height2 (T4MI); pectoralis muscle area (PMCSA); and PMCSA divided by height2 (PMI) at the 4th vertebral region. Sarcopenia cutoff was defined as sex-specific values of less than −2 SD below the mean from the reference group. Results: In the reference group, T4CSA, T4MI, PMCSA, and PMI cutoffs for sarcopenia were 100.06cm2, 33.69cm2/m2, 29.00cm2, and 10.17cm2/m2 in male, and 66.93cm2, 26.01cm2/m2, 18.29cm2, and 7.31cm2/m2 in female, respectively. The prevalence of sarcopenia in the study group measured with T4CSA, T4MI, PMCSA and PMI cutoffs were 11.4%, 8.7%, 8.5%, and 10.1%, respectively. Correlations were observed between appendicular skeletal mass divided by height2 measured by bioelectrical impedance analysis (BIA) and T4CSA (r = 0.82; P < 0.001)/T4MI (r = 0.68; P < 0.001), and ASM/height2 measured by BIA and PMCSA (r = 0.72; P < 0.001)/PMI (r = 0.63; P < 0.001). In the multivariate logistic regression models, sarcopenia defined by T4CSA/T4MI were related to age [odds ratio (95% confidence interval), P-values: 1.09 (1.07–1.11), <0.001/1.05 (1.04–1.07), <0.001] and diabetes [1.60 (1.14–2.25), 0.007/1.47 (1.01–2.14), 0.043]. Sarcopenia defined by PMCSA/PMI were related to age [1.09 (1.08–1.10), <0.001/1.05 (1.03–1.06), <0.001], male sex [0.23 (0.18–0.30), <0.001/0.47 (0.32–0.71), <0.001], diabetes [2.30 (1.73–3.05), <0.001/1.63 (1.15–2.32), 0.007], history of cancer [2.51 (1.78–3.55), <0.001/1.61 (1.04–2.48), 0.033], and sufficient physical activity [0.67 (0.50–0.89), 0.007/0.74 (0.56–0.99), 0.042]. Conclusions: The reference cutoff values of a general population reported here will enable sex-specific standardization of thoracic muscle mass quantification and sarcopenia assessment.

Original languageEnglish
Pages (from-to)955-965
Number of pages11
JournalJournal of Cachexia, Sarcopenia and Muscle
Volume13
Issue number2
DOIs
Publication statusPublished - 2022 Apr

Bibliographical note

Funding Information:
This research was supported by funds (2019-2) provided by the Department of Internal Medicine, Yonsei University College of Medicine. The funding body had no role in the design of the study, collection, analysis, interpretation of data or writing of the manuscript. The authors are grateful to the staff of the Radiologic Department of Severance Hospital.

Funding Information:
This research was supported by funds (2019‐2) provided by the Department of Internal Medicine, Yonsei University College of Medicine. The funding body had no role in the design of the study, collection, analysis, interpretation of data or writing of the manuscript.

Publisher Copyright:
© 2022 The Authors. Journal of Cachexia, Sarcopenia and Muscle published by John Wiley & Sons Ltd on behalf of Society on Sarcopenia, Cachexia and Wasting Disorders.

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Physiology (medical)

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