Table 3. Associations of K Resin Prescription with Various Types of Phosphate Binder (PB) Prescription.

Outcome	Crude model*	Adjusted model
Ca and/or Mg based PB only	1.59 (1.37-1.84)	1.31 (1.12-1.53)
Ca and/or Mg based PB plus other type of PB	3.14 (2.66-3.72)	2.01 (1.68-2.40)
Any other type of PB (non Ca/Mg based)	2.29 (1.96-2.69)	1.51 (1.28-1.79)

Multinomial logistic regression: Odds Ratio (95% CI) of the association of K resin prescription versus no K resin prescription. PB use category was treated as the outcome, with patients not prescribed any PB as the reference category. Models adjusted for DOPPS phase, country, age, gender, black race, vintage, body mass index, residual kidney function, HD vascular access type, serum ferritin, hemoglobin, white blood cell count, serum albumin, serum creatinine, dialysate K, and 14 comorbid conditions (Table 1).

^*Crude model adjusted for DOPPS phase and country