Table 4.

Hemodialysis patient groups based on the duration and inorganic sulphate levels.

HD group	pSO4 level medians	Min–max
Group 1 (n = 14)	0.5393 (0.44)	0.32–0.88
Group 2 (n = 32)	0.525 (0.57)	0.04–0.84
Group 3 (n = 15)	0.6413 (0.64)	0.42–0.93
Group 4 (n = 10)	0.596 (0.555)	0.04–0.93