Table 2. Correlation between edema, age, laboratory date, GNRI, and physical function.

ECW/TBW: Extracellular water/total body water, eGFR: Estimated glomerular filtration rate, Alb: Albuminm, Hb: Hemoglobin, GNRI: Geriatric nutritional risk index, TUG: Timed up & go test, IPS: Index of postural stability

Spearman's rank correlation coefficient *p<0.05; **p<0.01

Variables	ECW/TBW	Edema scale	Age	eGFR	Alb	Hb	GNRI	Knee extension muscle strength	TUG	IPS	Total trajectory length
ECW/TBW		0.605**	0.243	-0.151	-0.745**	-0.419*	-0.699**	-0.395*	0.572**	-0.087	-0.122
Edema scale	0.605**		-0.073	-0.286	-0.515**	-0.036	-0.422*	-0.352	0.408	-0.141	0.103
Age	0.243	-0.073		-0.096	-0.26	-0.388*	-0.333	-0.308	0.503*	-0.394*	0.002
eGFR	-0.151	-0.286	-0.096		0.25	0.436*	0.119	0.319	-0.612**	0.145	-0.240
Alb	-0.745**	-0.515**	-0.26	0.25		0.471**	0.964**	0.327	-0.511	0.063	-0.018
Hb	-0.419*	-0.036	-0.388*	0.436*	0.471**		0.455*	0.308	-0.618**	0.181	-0.007
GNRI	-0.699**	-0.422*	-0.333	0.119	0.964**	0.455*		0.282	-0.455**	0.006	0.055
Knee extension muscle strength	-0.395*	-0.352	-0.308	0.319	0.327	0.308	0.282		-0.764**	0.243	-0.211
TUG	0.572**	0.408	0.503*	-0.612**	-0.511	-0.618**	-0.455**	-0.764**		-0.498*	0.404
IPS	-0.087	-0.141	-0.394*	0.145	0.063	0.181	0.006	0.243	-0.498*		-0.385*
Total trajectory length	-0.122	0.103	0.002	-0.240	-0.018	-0.007	0.055	-0.211	0.404	-0.385*