5 mg/dL 라는 하나의 기준치로 평가 하면 신손상이 급성인지 만성인지를 구분할 수 없다는 점도 문제점으로 지적되었다.
It was pointed out as a problem that it was not possible to distinguish whether renal injury was acute or chronic when evaluated with a single baseline of 5 mg/dL.