Microalbuminuria assessment is essential for diagnosing incipient nephropathy in diabetic patients. The present study aim to evaluate whether urinary albumin concentration (UAC) and urinary albumin-to-creatinine ratio (UACR) agree with 24 h urine collection in screening for albuminuria > 30 mg/24 h in type 1 and 2 diabetics. In this cross-sectional study were evaluated 293 diabetic patients (117 type 1 and 176 type 2). Albuminuria was determinated by turbidimetric immunoassay. The best discriminator value was 22 mg/l (sensitivity 82.5%, specificity 74.0%) […]