TABLE I -.

Baseline characteristics of patients on hemodialysis with/without CKD-aP

	CKD-aP patients (n = 218)	Non-CKD-aP patients (n = 1,021)	p-Value
CKD-aP = chronic kidney disease-associated pruritus.
*Differences statistically significant (p-value <0.05) through a chi-square test between distributions for distributions by age, and through a chi-square test between frequencies for demographics and comorbidities.
Males (n; %)	121; 55.5	583; 57.1	0.72
Median age (Q1; Q3)	71 (61; 80)	68 (53; 79)	0.07
Mean age (±standard deviation)	69 (±13)	66 (±15)
Distribution by age group (n; %)			0.03*
<18	0; 0.0	2; 0.2
18-29	2; 0.9	8; 0.8
30-39	3; 1.4	39; 3.8
40-49	10; 4.6	118; 11.6
50-59	30; 13.8	156; 15.3
60-69	59; 27.1	235; 23.0
70-79	61; 28.0	263; 25.8
≥80	53; 24.3	200; 19.6
Total	218; 100.0	1,021; 100.0
Potential CKD-aP-related comorbidities (n; %)
Hyperphosphatemia	150; 68.8	623; 61.0	0.03*
Hyperparathyroidism	102; 46.8	437; 42.8	0.3
Anemia	81; 37.2	364; 35.7	0.7
Hyperuricemia	36; 16.5	178; 17.4	0.7
Other comorbidities of interest (n; %)
Arterial hypertension	162; 74.3	732; 71.7	0.4
Diabetes mellitus	57; 26.1	195; 19.1	0.01*
Hypothyroidism	41; 18.8	138; 13.5	0.04*
Depression	31; 14.2	85; 8.3	0.007*
Coronary artery disease	21; 9.6	86; 8.4	0.6
Viral hepatopathies	2; 0.9	5; 0.5	0.4