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  • Title: [Validity of the first morning urine collection for screening for microalbuminuria in the diabetic].
    Author: Signorini AM, Fondelli C, Tanganelli I, Pallassini A, Gragnoli G.
    Journal: Boll Soc Ital Biol Sper; 1989 Aug; 65(8):719-25. PubMed ID: 2803735.
    Abstract:
    With the aim of evaluating the reliability of morning urine collection, compared to the overnight period, in the assessment of microalbuminuria, we measured albumin and creatinine concentration in overnight and morning urine of 125 diabetic outpatients. The overnight albumin excretion rate resulted in relation to morning albumin concentration and morning albumin/creatinine ratio. The sensitivity of this method of urine collection, compared to the overnight sample, was 55.5%, the specificity 96.6% and the predictive value 43% using, as a measure, the albumin concentration. These values improved by correcting albumin for creatinine concentration. Concerning high risk albuminuria (overnight excretion rate greater than 30 micrograms/min), we found a sensitivity and predictive value of the first morning collection highly improved by the albumin/creatinine ratio. It is concluded that the first morning urine collection can be used in the diagnosis of microalbuminuria in diabetic patients, especially when we calculate the albumin/creatinine ratio. This simple and reliable method allows the identification of microalbuminuric subjects and of the patients at risk to develop clinical nephropathy with a good sensitivity.
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