| Groups Variables | Control group | Patients group | t. test | p-value | |
| No. = 30 | No. = 30 | ||||
| Age (years) | Mean ± SD | 10.77 ± 2.87 | 12.00 ± 3.46 | 1.501 | 0.139 |
| Sex | Female | 17 (56.7%) | 12 (40.0%) | 1.669* | 0.196 |
| Male | 13 (43.3%) | 18 (60.0%) | |||
| Weight z-score, median (IQR) | 0.07 (−0.50 - 0.90) | −0.60 (−0.80 - 0.00) | 2.980≠ | 0.003 | |
| Height z-score, median (IQR) | 0.07 (−0.23 - 1.10) | −0.50 (−0.96 - 0.05) | 3.029≠ | 0.002 | |
| BMI z-score, median (IQR) | −0.16 (−0.50 - 0.56) | −0.38 (−0.72 - 0.22) | 1.220≠ | 0.223 | |
| SBP (mmHg) | 98.33 ± 7.23 | 128.67 ± 29.68 | 5.4390• | 0.000 | |
| DBP (mmHg) | 61.33 ± 3.20 | 83.67 ± 25.26 | 4.8050• | 0.000 | |
| HR (beat/min) | 73.80 ± 14.54 | 86.10 ± 12.71 | 3.4880• | 0.001 | |
| Duration of haemodialysis (years) | Median (IQR) | - | 3.5 (2 – 4) | - | - |