Are outpatient potassium levels above and below the normal range associated with adverse outcomes across different levels of kidney function?
Both hypokalemia and hyperkalemia are associated with adverse outcomes regardless of baseline kidney function.
Outpatient potassium levels both above and below the normal range are consistently associated with adverse outcomes, with similar risk relationships across eGFR and albuminuria.
Kövesdy et al. (2018) studied this question.