ACR is the ratio of microalbumin (mALB) to creatinine in urine.
Compared to separately detecting urinary microalbumin and creatinine, ACR uses creatinine to correct the concentration of urinary albumin, and the results are not affected by renal basement membrane lesions. It can eliminate the influence of sampling methods and urine concentration on urinary albumin excretion and accurately reflect the status of renal function.