Table 4.

Simple regression analysis for pruritus in daytime and nighttime related clinical parameters in hemodialysis patients

	Versus VAS (daytime)			Versus VAS (nighttime)
	r2	F-value	P-value	r2	F-value	P-value
Age	0.006	0.27	0.6	0.002	0.08	0.79
BNP	0.05	2.4	0.13	0.07	3	0.09
Dialysis vintage	0.002	0.07	0.8	0.03	1.09	0.3
Hemoglobin	0.002	0.07	0.96	0.01	0.44	0.5
Hematocrit	0.001	0.06	0.81	0.03	1.24	0.27
Iron	0.004	0.18	0.68	0.0001	0.006	0.94
TIBC	0.0003	0.01	0.9	0.12	5.67	0.02
Ferritin	0.04	1.4	0.24	0.0005	0.02	0.88
Calcium	0.04	1.8	0.17	0.059	2.64	0.11
Albumin	0.004	0.18	0.67	0.01	0.44	0.51
Phosphorus	0.002	0.08	0.78	0.01	0.47	0.5
Intact PTH	0.03	1.2	0.29	0.002	0.1	0.76
Pre-dialysis BUN	0.0001	0.005	0.94	0.001	0.04	0.83
Post-dialysis BUN	0.0007	0.03	0.87	0.012	0.51	0.48
Pre-dialysis creatinine	0.08	3.7	0.06	0.038	1.67	0.2
Post-dialysis creatinine	0.03	1.2	0.27	0.05	2	0.17
β2-microglobulin	0.11	2.9	0.1	0.11	2.7	0.11
AST	0.008	0.3	0.56	0.008	0.34	0.56
ALT	0.03	1.13	0.29	0.026	1.13	0.29
γ-GTP	0.02	0.72	0.39	0.02	0.73	0.4
Total bilirubin	0.007	0.14	0.7	0.007	0.14	0.7
Triglyceride	<0.0001	0	0.99	<0.0001	0	0.99
LDL-cholesterol	0.002	0.06	0.8	0.002	0.06	0.81
C-reactive protein	0.053	2.35	0.13	0.053	2.35	0.13
Sex			0.4			0.7

Abbreviations: γ-GTP, γ-glutamyl transpeptidase; AST, aspartate aminotransferase; ALT, alanine aminotransferase; BNP, B-type (brain) natriuretic peptide; BUN, blood urea nitrogen; LDL, low-density lipoprotein; PTH, parathyroid hormone; TIBC, total iron binding capacity; VAS, visual analog scale.