DISPROPORTIONATELY RAISED SERUM CREATININE RELATIVE TO UREA

liver disease

trimethoprim [competes with creatinine for renal excretion]

rhabdomyolysis

dialysis [urea is a smaller molecule and thus dialysed more]

racial [Negroes]

pregnancy

vomiting

CRF on low protein diet

low muscle bulk [elderly; amputation]

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