Table 5. Mean values of indicators in the two studied groups in the three tertiles (T1, T2, and T3).

spKt/V: single-pool Kt/V, dialysis adequacy index; URR%: urea reduction ratio, dialysis adequacy index; nPCR (g/kg/d): normalized protein catabolic rate; Alb (g/l): serum albumin; Hgb (g/l): hemoglobin; ESA (UI/week): erythropoietin stimulating agent; Qo (l): convective volume; IDH (%): intradialytic hypotension; RT (h): recovery time; HD: hemodialysis

Indicator (X±SD)	Т1 (32-47 years)	Т2 (48-63 years)	Т3 (64-79 years)	Т1 (32-47 years)	Т2 (48-63 years)	Т3 (64-79 years)
Year	2020			2021
Therapy	Online HDF
spKt/V	1.84±0.10	1.9±0.12	1.73±0.04	2.0±0.10	1.96±0.08	1.57±0.24
URR%	79.55±0.82	80.15±2.02	79.01±0.72	81.16±1.13	81.46±1.86	75.73±3.13
nPCR (g/kg/d)	1.38±0.04	1.34±0.07	1.14±0.07	1.4±0.06	1.36±0.07	1.17±0.05
Alb (g/l)	42.53±0.60	41.35±4.18	32.9±3.37	42.48±2.02	39.65±2.43	33.98±7.73
Hgb (g/l)	112.5±4.03	112.8±4.83	109.75±4.65	111.4±6.84	116±6.27	108.5±6.54
ESA (UI/week)	4666±1032	4666±1032	7000±1511	4800±1095	4625±1767	8500±3338
Qo	24.5±1.22	24.6±1.03	24.8±0.99	25±0.70	25.37±0.74	18.25±4.52
IDH	0%	0%	75%	0%	0%	12.5%
RT (h)	1.16±0.40	1.5±0.54	5.5±2.72	1.12±0.21	1.25±0.46	2.13±0.35
Therapy	Conventional HD
spKt/V	1.35±0.07	1.27±0.11	1.28±0.13	1.39±0.03	1.34±0.09	1.41±0.07
URR%	71.4±3.97	67.16±6.61	69.48±5.98	72.84±2.27	70.02±3.12	73.26±2.83
nPCR (g/kg/d)	1.21±0.02	1.10±0.10	1.21±0.11	1.2±0.01	1.16±0.05	1.25±0.05
Alb (g/l)	36.98±1.23	33.68±2.85	37.43±3.5	37.28±1.3	33.88±3.15	39.28±0,33
Hgb (g/l)	105.6±6.58	98.5±2.07	104.6±3.98	104.4±3.84	101.8±4.6	108.4±6.51
ESA (UI/week)	8400±2509	11125±1642	9666±2658	9200±1643	10600±1949	9000±1732
IDH	0%	87%	16.5%	20%	90%	4%
RT (h)	3.8±2.68	7.87±5.30	4.66±3.98	4.0±2.23	9.8±8.67	2.2±0.44