Serum histamine and cortisol concentrations

Patient parameters	Control normal patients group	Haemodialysis patients group
Patient parameters	Control normal patients group	Without pruritus	Mild pruritus	Moderate pruritus	Severe pruritus
Histamine (mg/dl)	1.50 ±0.33^d	10.97 ±3.21^c	8.72 ±3.51^c	14.21 ±2.66^b	19.99 ± 3.94^a
Cortisol (mg/dl)	7.79 ±1.78^d	35.48 ±11.09^c	58.35 ±15.32^b	73.81 ±11.76^a	58.38 ±10.37^b

Reference ranges are given as Mean ± S. E. Mean values with different superscripts in the same row are significantly different at (P<0.05)

Table 3: Serum histamine and cortisol concentrations in normal control and hemodialysis patients with and without pruritus.