Table 2.

Bioimpedance parameters of 97 HD-patients grouped according to dialysis frequency.

	All patients	Twice-weekly HD	Thrice-weekly HD	P value
No. of patients	97	36	61
OH	2.13 ± 1.47	2.54 ± 1.42	1.88 ± 1.46	0.033
<6 years HD vintage	2.02 ± 1.74	2.18 ± 1.51	1.85 ± 2.00	0.592
	(n = 33)	(n = 17)	(n = 16)
≥6years HD vintage	2.18 ± 1.32	2.86 ± 1.29	1.90 ± 1.24	0.006
	(n = 64)	(n = 19)	(n = 45)
ECW	14.69 ± 3.01	14.88 ± 2.98	14.59 ± 3.06	0.652
<6 years HD vintage	14.59 ± 3.49	15.03 ± 3.55	14.13 ± 3.47	0.466
	(n = 33)	(n = 17)	(n = 16)
≥6years HD vintage	14.75 ± 2.77	14.74 ± 2.45	14.75 ± 2.92	0.985
	(n = 64)	(n = 19)	(n = 45)
OH/ECW	0.14 ± 0.08	0.17 ± 0.07	0.12 ± 0.08	0.015
<6 years HD vintage	0.13 ± 0.09	0.14 ± 0.07	0.12 ± 0.10	0.470
	(n = 33)	(n = 17)	(n = 16)
≥6years HD vintage	0.15 ± 0.08	0.19 ± 0.07	0.13 ± 0.08	0.004
	(n = 64)	(n = 19)	(n = 45)

NOTE. Data are expressed as mean ± SD, P values result from comparisons of hydration status indexes of the two groups divided by HD frequency.

Abbreviations: OH: overhydration; ECW: extracellular water.