Table 4. Multivariable linear regression analysis of the determinants of visual analogue scale scores of pruritus intensity.

	Parameter	Standard
Covariate	Estimate	Error	P value
Intercept	-5.530	1.322	<	0.001
Weekly total Kt/V < 1.88	1.165	0.577		0.047
Duration of dialysis > 4.1 (year)	1.153	0.529		0.032
Normalized protein nitrogen appearance (g/kg/day)	3.415	0.989		0.001
41.3 ≤ age < 64.9 (years)	-1.371	0.494		0.007
High-sensitivity C-reactive protein > 0.16 (mg/L)	1.024	0.468		0.032
149.2 ≤ total cholesterol < 226.1 (mg/dL)	-1.743	0.451	<	0.001
Intact parathyroid hormone (pg/mL)	0.002	0.001		0.002

Goodness-of-fit assessment: R² = 0.377. The R² value indicates that the correlation between the observed and predicted visual analogue scale scores is 0.614.