Effect of intra-dialytic physical exercise on depression in prevalent hemodialysis patients

Table 3 Comparison between group I and group II at the end of the study as regard the studied parameters

After	Group I	Group II	Test value	P value
After	n = 25	n = 25	Test value	P value
TNF-α (pg/ml)
Mean ± SD	46.24 ± 14.66	87.24 ± 23.95	− 7.301•	0.000
Range	20–79	48–137	− 7.301•	0.000
Ca (mg/dl)
Mean ± SD	8.36 ± 0.65	8.40 ± 0.45	− 0.229•	0.820
Range	7.3–9.3	7.7–9.3	− 0.229•	0.820
PO₄ (mg/dl)
Mean ± SD	4.36 ± 0.90	5.08 ± 1.30	− 2.292•	0.026
Range	2.8–6	2.6–6.7	− 2.292•	0.026
PTH (Pg/ml)
Mean ± SD	402.00 ± 140.98	482.96 ± 131.46	− 2.100•	0.041
Range	140–620	300–770	− 2.100•	0.041
URR %
Mean ± SD	76.23 ± 7.48	72.08 ± 6.66	2.071•	0.044
Range	65–90	61.5–90.2	2.071•	0.044
HB (g/dl)
Mean ± SD	9.55 ± 0.92	9.56 ± 0.77	− 0.017•	0.987
Range	8–12.7	8–10.7	− 0.017•	0.987
T. sat. %
Mean ± SD	31.39 ± 8.26	31.55 ± 6.18	− 0.080•	0.937
Range	12.6–48	16.8–42	− 0.080•	0.937
TSH (mu/l)
Mean ± SD	1.46 ± 0.33	1.48 ± 0.54	− 0.159•	0.874
Range	0.9–2.1	0.5–2.5	− 0.159•	0.874
HDRS
Mean ± SD	10.4 ± 3.25	16.16 ± 3.95	− 5.624•	0.000
Range	5–18	8–23	− 5.624•	0.000
6MWT(m)
Mean ± SD	253.04 ± 42.48	204.72 ± 41.13	4.086•	0.000
Range	177–343	142–283	4.086•	0.000
RAPA
Median (IQR)	3 (3–3)	1 (1–2)	− 4.836≠	0.000
Range	1–4	1–3	− 4.836≠	0.000
PeakVO₂ (ml/(kg min)
Mean ± SD	10.72 ± 0.98	9.66 ± 0.87	4.042•	0.000
Range	9–12.8	8.2–11.4	4.042•	0.000

•: Independent t test; ≠: Mann–Whitney test; P value > 0.05: non-significant; P value < 0.05: significant; P value < 0.01: highly significant
TNF-α: tumor necrosis factor alpha, Ca: calcium, PO₄: phosphorus, PTH: parathyroid hormone, URR: urea reduction ratio, HB: hemoglobin, T. sat.: transferrin saturation, TSH: Thyroid stimulation hormone, Hamilton Depression Rating Scale (HDRS), 6MWT: six-min walk test, RAPA: rapid assessment of physical activity, peak VO₂: peak volume of oxygen consumption