Table 4. Multiple regression analysis of factors related to TUG.

Each multivariate analysis was conducted by using age and sex plus one factor as confounding factors to avoid overfitting due to the small sample size.

TUG: Timed up & go test, ECW/TBW: Extracellular water/total body water, IPS: Index of postural stability, GNRI: Geriatric nutritional risk index, Hb: Hemoglobin

Confounding factor	Coefficient of determination (R2)	Standardized coefficient (β)	p-value	95% confidence interval
TUG adjusted by age, sex, and ECW/TBW	0.389	0.416	0.046	0.896 to 93.130
TUG adjusted by age, sex, and IPS	0.374	-0.433	0.059	-5.007 to -0.101
TUG adjusted by age, sex, and GNRI	0.258	-0.191	0.385	-0.114 to 0.046
TUG adjusted by age, sex, and Hb	0.357	-0.404	0.077	-0.732 to 0.042