Novel Algorithm to Estimate Fat‐Free Muscle Volumes in Women Using the Urinary Deuterated‐Creatine Dilution Method

ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim wa...

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Published inJournal of cachexia, sarcopenia and muscle Vol. 16; no. 4; pp. e13872 - n/a
Main Authors Tan, Darren Yuen Zhang, Cheong, Wei Fun, Ji, Shanshan, Cazenave‐Gassiot, Amaury, Cauley, Jane, Shen, Liang, Yong, Eu‐Leong
Format Journal Article
LanguageEnglish
Published Germany John Wiley & Sons, Inc 01.08.2025
John Wiley and Sons Inc
Wiley
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ISSN2190-5991
2190-6009
2190-6009
DOI10.1002/jcsm.13872

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Abstract ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D3Cr algorithm incorporating anthropomorphic variables that can estimate fat‐free muscle mass, using magnetic resonance imaging (MRI) as the reference standard. Methods The Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community‐dwelling women, aged 45–69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D3Cr and had available MRI measurements of fat‐free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D3‐creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D3Cr. Muscle mass was estimated using the two D3Cr algorithms (D3Croriginal and D3Crmodified) in current use and a newly developed algorithm (D3CrHt‐Wt) incorporating anthropometric variables that estimate fat‐free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D3Cr algorithms with MRI. Bland–Altman analysis was used to ascertain agreement between D3CrHt‐Wt and MRI. Results Participants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = −0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = −0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat‐free muscle volumes. In the final model, D3Cr‐determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat‐free muscle volumes and were incorporated into a new algorithm (D3CrHt‐Wt). In a separate validation cohort, muscle volumes estimated using the D3CrHt‐Wt algorithm (R = 0.813) had a higher correlation with MRI‐measured fat‐free muscle volumes than both D3Croriginal (R = 0.672) and D3Crmodified (R = 0.692) algorithms. Bland–Altman analysis indicated a low bias of 0.112 L and limits of agreement of −0.969 L to +1.190 L. Conclusions Muscle volumes estimated with the D3CrHt‐Wt algorithm had high correlation and agreement with MRI‐measured fat‐free muscle volumes. The convenience of the D3Cr method for participants suggests its potential to be a clinically relevant method for assessing fat‐free muscle volumes in sarcopenia studies.
AbstractList Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D3Cr algorithm incorporating anthropomorphic variables that can estimate fat-free muscle mass, using magnetic resonance imaging (MRI) as the reference standard.BACKGROUNDMuscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D3Cr algorithm incorporating anthropomorphic variables that can estimate fat-free muscle mass, using magnetic resonance imaging (MRI) as the reference standard.The Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community-dwelling women, aged 45-69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D3Cr and had available MRI measurements of fat-free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D3-creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D3Cr. Muscle mass was estimated using the two D3Cr algorithms (D3Croriginal and D3Crmodified) in current use and a newly developed algorithm (D3CrHt-Wt) incorporating anthropometric variables that estimate fat-free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D3Cr algorithms with MRI. Bland-Altman analysis was used to ascertain agreement between D3CrHt-Wt and MRI.METHODSThe Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community-dwelling women, aged 45-69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D3Cr and had available MRI measurements of fat-free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D3-creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D3Cr. Muscle mass was estimated using the two D3Cr algorithms (D3Croriginal and D3Crmodified) in current use and a newly developed algorithm (D3CrHt-Wt) incorporating anthropometric variables that estimate fat-free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D3Cr algorithms with MRI. Bland-Altman analysis was used to ascertain agreement between D3CrHt-Wt and MRI.Participants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = -0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = -0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat-free muscle volumes. In the final model, D3Cr-determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat-free muscle volumes and were incorporated into a new algorithm (D3CrHt-Wt). In a separate validation cohort, muscle volumes estimated using the D3CrHt-Wt algorithm (R = 0.813) had a higher correlation with MRI-measured fat-free muscle volumes than both D3Croriginal (R = 0.672) and D3Crmodified (R = 0.692) algorithms. Bland-Altman analysis indicated a low bias of 0.112 L and limits of agreement of -0.969 L to +1.190 L.RESULTSParticipants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = -0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = -0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat-free muscle volumes. In the final model, D3Cr-determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat-free muscle volumes and were incorporated into a new algorithm (D3CrHt-Wt). In a separate validation cohort, muscle volumes estimated using the D3CrHt-Wt algorithm (R = 0.813) had a higher correlation with MRI-measured fat-free muscle volumes than both D3Croriginal (R = 0.672) and D3Crmodified (R = 0.692) algorithms. Bland-Altman analysis indicated a low bias of 0.112 L and limits of agreement of -0.969 L to +1.190 L.Muscle volumes estimated with the D3CrHt-Wt algorithm had high correlation and agreement with MRI-measured fat-free muscle volumes. The convenience of the D3Cr method for participants suggests its potential to be a clinically relevant method for assessing fat-free muscle volumes in sarcopenia studies.CONCLUSIONSMuscle volumes estimated with the D3CrHt-Wt algorithm had high correlation and agreement with MRI-measured fat-free muscle volumes. The convenience of the D3Cr method for participants suggests its potential to be a clinically relevant method for assessing fat-free muscle volumes in sarcopenia studies.
ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D3Cr algorithm incorporating anthropomorphic variables that can estimate fat‐free muscle mass, using magnetic resonance imaging (MRI) as the reference standard. Methods The Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community‐dwelling women, aged 45–69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D3Cr and had available MRI measurements of fat‐free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D3‐creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D3Cr. Muscle mass was estimated using the two D3Cr algorithms (D3Croriginal and D3Crmodified) in current use and a newly developed algorithm (D3CrHt‐Wt) incorporating anthropometric variables that estimate fat‐free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D3Cr algorithms with MRI. Bland–Altman analysis was used to ascertain agreement between D3CrHt‐Wt and MRI. Results Participants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = −0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = −0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat‐free muscle volumes. In the final model, D3Cr‐determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat‐free muscle volumes and were incorporated into a new algorithm (D3CrHt‐Wt). In a separate validation cohort, muscle volumes estimated using the D3CrHt‐Wt algorithm (R = 0.813) had a higher correlation with MRI‐measured fat‐free muscle volumes than both D3Croriginal (R = 0.672) and D3Crmodified (R = 0.692) algorithms. Bland–Altman analysis indicated a low bias of 0.112 L and limits of agreement of −0.969 L to +1.190 L. Conclusions Muscle volumes estimated with the D3CrHt‐Wt algorithm had high correlation and agreement with MRI‐measured fat‐free muscle volumes. The convenience of the D3Cr method for participants suggests its potential to be a clinically relevant method for assessing fat‐free muscle volumes in sarcopenia studies.
ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D3Cr algorithm incorporating anthropomorphic variables that can estimate fat‐free muscle mass, using magnetic resonance imaging (MRI) as the reference standard. Methods The Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community‐dwelling women, aged 45–69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D3Cr and had available MRI measurements of fat‐free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D3‐creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D3Cr. Muscle mass was estimated using the two D3Cr algorithms (D3Croriginal and D3Crmodified) in current use and a newly developed algorithm (D3CrHt‐Wt) incorporating anthropometric variables that estimate fat‐free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D3Cr algorithms with MRI. Bland–Altman analysis was used to ascertain agreement between D3CrHt‐Wt and MRI. Results Participants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = −0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = −0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat‐free muscle volumes. In the final model, D3Cr‐determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat‐free muscle volumes and were incorporated into a new algorithm (D3CrHt‐Wt). In a separate validation cohort, muscle volumes estimated using the D3CrHt‐Wt algorithm (R = 0.813) had a higher correlation with MRI‐measured fat‐free muscle volumes than both D3Croriginal (R = 0.672) and D3Crmodified (R = 0.692) algorithms. Bland–Altman analysis indicated a low bias of 0.112 L and limits of agreement of −0.969 L to +1.190 L. Conclusions Muscle volumes estimated with the D3CrHt‐Wt algorithm had high correlation and agreement with MRI‐measured fat‐free muscle volumes. The convenience of the D3Cr method for participants suggests its potential to be a clinically relevant method for assessing fat‐free muscle volumes in sarcopenia studies.
Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D Cr) dilution method provides a direct assessment of muscle mass, but its accuracy in Asian women has not been evaluated. Our aim was to develop a new D Cr algorithm incorporating anthropomorphic variables that can estimate fat-free muscle mass, using magnetic resonance imaging (MRI) as the reference standard. The Integrated Women's Health Programme (IWHP) enrolled 1201 healthy community-dwelling women, aged 45-69 years at baseline, who attended gynaecological clinics from 2014 to 2016. Between February 2021 and July 2023, 894 participants were recontacted, and 451 of the respondents agreed to ingest 30 mg of D Cr and had available MRI measurements of fat-free thigh and erector spinae volumes. Urinary levels of creatine, creatinine and D -creatinine levels were measured by tandem mass spectrometry 4 days after ingestion of D Cr. Muscle mass was estimated using the two D Cr algorithms (D Cr and D Cr ) in current use and a newly developed algorithm (D Cr ) incorporating anthropometric variables that estimate fat-free muscle volumes. Pearson's correlation analyses were used to compare the performances of the D Cr algorithms with MRI. Bland-Altman analysis was used to ascertain agreement between D Cr and MRI. Participants (n = 451, mean age 62.6 ± 5.9) were randomly divided into training (n = 367) and validation (n = 84) cohorts. In the training cohort, stepwise multivariable regression modelling indicated that age (β = -0.011, p = 0.076) and ethnicity (β = 0.154, p = 0.317 [Indian]; β = -0.012, p = 0.942 [Malay] compared to Chinese) were not associated with fat-free muscle volumes. In the final model, D Cr-determined creatine pool size (β = 0.032, p < 0.001), body weight (β = 0.030, p < 0.001) and height (β = 4.336, p < 0.001) were independently associated with fat-free muscle volumes and were incorporated into a new algorithm (D Cr ). In a separate validation cohort, muscle volumes estimated using the D Cr algorithm (R = 0.813) had a higher correlation with MRI-measured fat-free muscle volumes than both D Cr (R = 0.672) and D Cr (R = 0.692) algorithms. Bland-Altman analysis indicated a low bias of 0.112 L and limits of agreement of -0.969 L to +1.190 L. Muscle volumes estimated with the D Cr algorithm had high correlation and agreement with MRI-measured fat-free muscle volumes. The convenience of the D Cr method for participants suggests its potential to be a clinically relevant method for assessing fat-free muscle volumes in sarcopenia studies.
Author Shen, Liang
Cauley, Jane
Yong, Eu‐Leong
Cheong, Wei Fun
Tan, Darren Yuen Zhang
Ji, Shanshan
Cazenave‐Gassiot, Amaury
AuthorAffiliation 5 Biostatistics Unit, Yong Loo Lin School of Medicine National University of Singapore Singapore Republic of Singapore
4 Department of Epidemiology, Graduate School of Public Health University of Pittsburgh Pittsburgh Pennsylvania USA
1 Department of Obstetrics and Gynecology, Yong Loo Lin School of Medicine National University of Singapore Singapore Republic of Singapore
3 Department of Biochemistry, Yong Loo Lin School of Medicine National University of Singapore Singapore Republic of Singapore
2 Singapore Lipidomics Incubator, Life Sciences Institute National University of Singapore Singapore Republic of Singapore
AuthorAffiliation_xml – name: 1 Department of Obstetrics and Gynecology, Yong Loo Lin School of Medicine National University of Singapore Singapore Republic of Singapore
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– name: 3 Department of Biochemistry, Yong Loo Lin School of Medicine National University of Singapore Singapore Republic of Singapore
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Thu Aug 21 18:23:20 EDT 2025
Thu Jul 10 07:34:43 EDT 2025
Fri Aug 22 05:11:31 EDT 2025
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Wed Aug 27 16:26:32 EDT 2025
Fri Aug 22 09:40:07 EDT 2025
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Issue 4
Keywords muscle mass
body composition
creatinine
MRI
creatine
sarcopenia
Language English
License Attribution
2025 The Author(s). Journal of Cachexia, Sarcopenia and Muscle published by Wiley Periodicals LLC.
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Notes This study was funded by a Singapore National Medical Research Council grant (Numbers: CSASI20nov‐0006, MOH‐000670‐01).
Darren Yuen Zhang Tan and Wei Fun Cheong are co–first authors.
Funding
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Funding: This study was funded by a Singapore National Medical Research Council grant (Numbers: CSASI20nov‐0006, MOH‐000670‐01).
ORCID 0000-0001-6511-770X
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Snippet ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated...
Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D Cr)...
ABSTRACT Background Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated...
Muscle mass declines after menopause and is a key risk factor for frailty, falls and poor physical function as women age. The deuterated creatine (D3Cr)...
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StartPage e13872
SubjectTerms Aged
Algorithms
body composition
Chromatography
creatine
Creatine - urine
Creatinine
Deuterium
Ethnicity
Female
Humans
Magnetic Resonance Imaging
Middle age
Middle Aged
Mortality
MRI
muscle mass
Muscle, Skeletal - diagnostic imaging
Musculoskeletal system
Original
Quality control
Quality standards
Sarcopenia
Urine
Womens health
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Title Novel Algorithm to Estimate Fat‐Free Muscle Volumes in Women Using the Urinary Deuterated‐Creatine Dilution Method
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