What does the research say about 24-hour urinary creatinine excretion?

24-hour urinary creatinine excretion

There are 2 papers on 24-hour urinary creatinine excretion in aging research: 2 observational studies in people.

2 papers study it2 findings

“24-h UCE and SMI were significantly correlated (r = 0.54, p < 0.001) without bias between the two methods of assessing muscle mass.”

Skeletal muscle index

upin humans2

2 studies

Skeletal muscle index is associated with 24-hour urinary creatinine excretion in humans (healthy living kidney donors) (r = 0.188, p = 0.003).
“weak correlation with 24h-UCE (r = 0.188, p = 0.003)”
Humanshealthy living kidney donorsskeletal musclen = 394
Age- and sex-specific reference values for CT-based low skeletal muscle quantity and quality in healthy living kidney donors
Frontiers in physiologyApr 25, 2025
24-hour urinary creatinine excretion is associated with skeletal muscle index in humans (r = 0.54, p < 0.001).
“24-h UCE and SMI were significantly correlated (r = 0.54, p < 0.001) without bias between the two methods of assessing muscle mass.”
Humansn = 960
Reference values for low muscle mass and myosteatosis using tomographic muscle measurements in living kidney donors
Scientific reportsApr 10, 2023