Table 1: Baseline characteristics.

Characteristic	N = 260
Age in years, mean (SD)	51.2 (18.4)
Gender, n (%) Male	153 (59)
Race, n (%) Black White Hispanic Asian Other	232 (89) 15 (6) 7 (3) 5 (2) 1 (< 1)
Unit type, n (%) Medical-Surgical Surgical Intensive Care Unit Step-down Unit Neurology Intensive Care Unit Burn Medical Intensive Care Unit Emergency Care Center	216 (83.1) 16 (6.2) 9 (3.5) 9 (3.5) 4 (1.4) 3 (1.2) 3 (1.2)
Initial Potassium level, mean (SD) mEq/L	3.9 (0.34)
Potassium Concentration, n (%) Normal (> 3.5 mEq/L) Mild Hypokalemia (3-3.4 mEq/L) Moderate Hypokalemia (2.5-2.9 mEq/L) Severe Hypokalemia ( < 2.5 mEq/L)	145 (56) 112 (43) 2 (1) 1 (< 1)
SCr, mean (SD), mg/dl	1.13 (0.9)
Chronic Kidney Disease Stage 4 or 5, n (%)	10 (3.8)