Exploring the correlation between serum fibroblast growth factor-21 levels and Sarcopenia: a systematic review and meta-analysis.

The results of the analysis indicate that the decrease in grip strength level after being diagnosed with sarcopenia is extremely significant [MD = -7.32; (95% CI, -10.42 ,-4.23); P < 0.00001; I 2 = 93%] (Fig. 4 ), which is the most direct and significant clinical manifestation of sarcopenia.

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