Estimates of glomerular filtration rate (GFR) have been the mainstay of kidney functional assessment for some time and have been the most widely relied upon test to predict progression to end-stage renal disease (ESRD). Urinary microalbuminuria (MAU) has more recently been added to the assessment of chronic kidney disease. In this month's issue of the Journal of the American Society of Nephrology, researches confirm that the use of these two tests in conjunction improves the accuracy of predicting which patients will go on to develop ESRD. According to their analysis, if one uses eGFR and MAU together, the number of patients referred to a nephrologist that ultimately develop ESRD would fall from 38.4 to 11.4. This dramatic reduction implies that these 2 tests when used in conjunction greatly increases the diagnostic and prognostic accuracy of primary care physicians assessing for chronic kidney disease.
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