Table 5. Association between patient characteristics and response to CPS.

Variable	N	Response (%)	P*
Sex
Male	101	74	0.103
Female	92	83
CKD stage
Stage 2	6	75	0.658
Stage 3	86	82
Stage 4	70	76
Stage 5	31	74
CPS formula
Kalimate®	139	81	0.123
Argamate®	54	72
ACEI/ARB
Use	114	74	0.024
No use	79	86

CKD, chronic kidney disease; CPS, calcium polystyrene sulfonate; ACEI, angiotensin converting enzyme inhibitor; ARB, angiotensin II receptor blockade.

*Chi-square tests were used to compare dichotomous variables.