Abstract
Objectives
To clarify whether serum creatinine to cystatin C ratio (CCR), a marker of muscle mass and muscle function may be used as a simple marker of bone property.
Design
A cross-sectional analysis.
Setting
A general population-based observation study. Participants: 1,606 middle-aged to elderly (≥50 years, mean age: 66.9 ± 7.5 years old) men (n = 642) and post-menopausal women (n = 964).
Measurement
Speed of sound (SOS) at the calcaneal bone was used as a surrogate marker of bone mineral density. The cross-sectional area of the muscle at the mid-thigh was measured using computed tomography.
Results
There was significant linear correlation between the quartiles of CCR and SOS (Q1: 1,495 ± 25, Q2: 1,499 ± 24, Q3: 1,507 ± 26, Q4: 1,511 ± 25 m/sec; P < 0.001) even in a sex-separated analysis. This association was independent of major covariates (Q1: β = −0.126, P < 0.001; Q2: β = −0.096, P = 0.001; Q3: β = −0.022; P = 0.412, Q4: reference) and the mid-thigh muscle mass, while creatinine alone or eGFR did not show clear association with SOS.
Conclusion
The CCR may be used as a simple marker of bone property independently of muscle mass in a general population with preserved renal function.
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Acknowledgment
The authors are deeply indebted to the staff members of the J-SHIPP study. We also thank the editors of Enago for the English language review.
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All study procedures were approved by the ethics committee of Ehime University Graduate School of Medicine. Written informed consent was obtained from all participants.
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The Department of Anti-aging Medicine at Ehime University is funded by endowments from Nitta Gelatin Incorporated to the Ehime University.
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This research was supported by the Grant-in-Aid for Scientific Research (20018020, 19659163, 20390185, 23659382, 24390084, 23659352, 25293141, 26670313, 17H04123, 18K18450, 17H04123) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, research grant from the Japan Atherosclerosis Prevention Found, National Cardiovascular Research Grants, and Research Promotion Award from the Ehime University.
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Tabara, Y., Kohara, K., Okada, Y. et al. Creatinine to Cystatin C Ratio as a Marker of Bone Property in Older Adults: The J-Shipp Study. J Nutr Health Aging 24, 277–281 (2020). https://doi.org/10.1007/s12603-020-1315-6
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DOI: https://doi.org/10.1007/s12603-020-1315-6