Table 3.

Performance of baseline factors in predicting serum potassium testing in the 7 days after mineralocorticoid receptor antagonist (MRA) initiation.

Model Covariates	c-statistic	Pseudo R2
Age, gender	0.50	0.0007
Age, gender, pre-initiation serum potassium and creatinine*	0.56	0.0192
Age, gender, pre-initiation serum potassium and creatinine, MI, CABG, PCI, V-tach, dyslipidemia, starting dose of MRA, prescription for potassium chloride, prescription for thiazide diuretic, heart rate, systolic blood pressure†	0.67	0.1129
Age, gender, K levels, CR levels, MI, CABG, PCI, V-tach, starting dose of MRA, drug indicators for potassium chloride and thiazide diuretic, dyslipidemia, heart rate, systolic BP, site, year of MRA start	0.70	0.1620

^*Pre-initiation serum potassium and creatinine were categorized: potassium missing, ≤4.50 mmol, and > 4.50 mmol; creatinine missing, ≤1.50 mg/dL, and >1.50 mg/dL.

^†Median used for missing heart rate and systolic blood pressure. Addition of LVEF as continuous covariate for subjects with a quantitative measure did not significantly influence c-statistic or R.