Mild hyponatremia is associated with low skeletal muscle mass, physical function impairment, and depressive mood in the elderly.

As shown in Table 2 , the mild hyponatremia group also had more cases of sarcopenia, weaker GS, slower WS, shorter OLS time, and higher GDS-15 score. ANCOVA showed that mild hyponatremia had a significant effect on SMI ( F [1, 2393) = 4.2; p = 0.04), GS ( F [1, 1951] = 6.6; p = 0.01), WS ( F [1, 672] = 11.9; p = 0.001), and GDS-15 score ( F [1, 2883] = 9.7; p = 0.002) after controlling for covariates, and a nearly significant effect on OLS time ( F [1, 2527] = 3.6; p = 0.06) (Table 3 ).

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