Atencion primaria
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To validate the Cockroft-Gault and the abbreviated Modification of Diet in Renal Disease (MDRD) formulas in a hypertense population aged over 60 and with blood pressure monitored in out-patients. To evaluate the prevalence of various stages of hidden chronic kidney disease in this population. ⋯ There is a high prevalence of hidden chronic kidney disease in the hypertense population over 60 years old. Glomerular filtration should be determined systematically in these patients, even when their plasma creatinine figures are normal.