Since evaluation of glomerular filtration rate (GFR) is very important in daily medical care, and reliable methods for measuring GFR are too complicated, there has been along decades an enormous effort for developing accurate GFR equations. In the present review article, we performed a comprehensive analysis of the mainly described GFR equations, and we concluded that although MDRD, CKD-EPI, DRA and Gregori-Macías equations are valid to monitor renal function as well as to stage and follow up renal patients, the clinical nephrological evaluation still remains the best alternative for diagnosing renal health and disease.

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2 Abstract PurposeTo identify and prioritize potential topics to be addressed in the development of European, multidisciplinary guidelines on the management of chronic kidney disease stage 3b to 5 in older patients. MethodsWe composed a list of 47 potential guideline topics by reviewing the literature, consulting online 461 nephrologists and 107 geriatricians, and obtaining expert input. A multidisciplinary panel of twelve experts then prioritized the topics during a face-toface consensus meeting, following a Nominal Group Technique structure with two voting rounds. Topics were rated on a 9-point scale ranging from 1 ('not at all important') to 9('critically important'). ResultsThe highest rating (median; range) was assigned to 'Screening and referral' (8.5; 2.0). Eight topics shared the second highest rating with a median priority score of 8.0 (2.0), and included 'Starting dialysis or not' and 'Accurate assessment of renal function'.

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Our HUGE screening formula offers a straightforward, easily available and inexpensive method for differentiating between CRI and eGFR < 60 ml/min/1.73 m2 that will prevent a considerable number of aged healthy persons, as much as 1.700.000 in Spain and 2.600.000 in U.K., to be excluded from clinical assays or treatments contraindicated in CRI.