Table 2.

Clinical and analytical characteristics of frail versus nonfrail patients.

Variable	Frail (n = 18)	Nonfrail (n = 302)	p
Age	75,39 ± 11,53	69,85 ± 13,94	0,10
BMI	22,53 ± 3,58	26,16 ± 5,18	0,004
Hgb	10,35 ± 1,31	10,97 ± 1,18	0,032
Albumin	3,61 ± 0,36	3,85 ± 0,29	0,001
Npna	1,12 ± 0,26	10,01 ± 0,26	0,093
CaxP	35,98 ± 10,58	38,34 ± 10,73	0,354
Ktv	2,02 ± 0,23	1,88 ± 0,37	0,130

Npna: normalized protein nitrogen appearance; Ktv: K: urea clearance, t: dialysis time, and V: distribution volume.