Patients were stratified by baseline serum potassium level into mild or moderate hyperkalemia groups and received 1 of 3 randomized starting doses of patiromer ( 4.2 g [ n = 74 ] , 8.4 g [ n = 74 ] , or 12.6 g [ n = 74 ] twice daily [ mild hyperkalemia ] or 8.4 g [ n = 26 ] , 12.6 g [ n = 28 ] , or 16.8 g [ n = 30 ] twice daily [ moderate hyperkalemia ] ) .