| Title: | Diagnostic Power of Serum Creatinine/Cystatin C Ratio for Identifying Low MRI-Muscle Volume and Low Grip Strength: Data From 9 731 to 149 707 UK Biobank Older Adults |
| Journal: | The Journals of Gerontology Series A |
| Published: | 14 Nov 2024 |
| Pubmed: | https://pubmed.ncbi.nlm.nih.gov/39538979/ |
| DOI: | https://doi.org/10.1093/gerona/glae274 |
| URL: | https://academic.oup.com/biomedgerontology/advance-article-pdf/doi/10.1093/gerona/glae274/60658189/glae274.pdf |
Publication 14184
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Abstract
BACKGROUND: Biomarkers for sarcopenia are lacking. We examined the diagnostic power of serum creatinine to cystatin C ratio for identifying low magnetic resonance imaging-muscle volume and low grip strength in a large observational study of UK Biobank older adults.</p>
METHODS: Serum creatinine and cystatin C were measured via immunoassays (Beckman Coulter AU5800 and Siemens Advia 1800, respectively) and grip strength by hydraulic hand dynamometer at baseline visit (2008-2010). magnetic resonance imaging-thigh fat-free muscle volume and DXA-derived appendicular lean mass were measured at imaging visit (2014-2018). Extreme outliers were removed, and covariates (demographic, lifestyle, and clinical factors, as well as time elapsed between baseline-imaging visit) were adjusted for in statistical models.</p>
RESULTS: 12 873 older adults (mean age: 63.5 ± 2.7 years, 44.2% women) were included for fat-free muscle volume and appendicular lean mass/body mass index; 149 707 older adults (mean age: 64.0 ± 2.9 years, 50.5% women) for grip strength. Despite significant associations (p < .05), in fully adjusted models, creatinine to cystatin C showed poor to acceptable diagnostic power for identifying low fat-free muscle volume when using cutpoints of 20th percentile (area under the curve: 0.577 men; 0.622 women) and T scores of -2 (area under the curve: 0.596 men; 0.659 women) and -2.5 (area under the curve: 0.609 men; 0.722 women). In fully adjusted model, creatinine to cystatin C showed poor diagnostic power (area under the curves: <0.70) for identifying low appendicular lean mass/body mass index or low grip strength, irrespective of the cutpoint used.</p>
CONCLUSIONS: Creatinine to cystatin C may not be a suitable biomarker for identifying low muscle volume or low strength in older adults. This finding, drawn from a large sample size and the use of advanced medical imaging, marks an important contribution to the sarcopenia field.</p>
15 Keywords
- Aged
- Biological Specimen Banks
- Biomarkers
- Creatinine
- Cystatin C
- Female
- Hand Strength
- Humans
- Magnetic Resonance Imaging
- Male
- Middle Aged
- Muscle, Skeletal
- Sarcopenia
- UK Biobank
- United Kingdom
10 Authors
- Ben Kirk
- Chia-Ling Kuo
- Peiran Liu
- Meiruo Xiang
- Jesse Zanker
- Konstantinos Prokopidis
- Marc Sim
- Richard H Fortinsky
- George A Kuchel
- Gustavo Duque
1 Application
| Application ID | Title |
|---|---|
| 92647 | Research to Inform the Field of Precision Gerontology |
Enabling scientific discoveries that improve human health