Almaguer López M, Herrera Valdés R, Chipi Cabrera J, Toirac Cabrera X, Castellanos Rabanal O, Bacallao Gallestey J. Design & methodology of the Isle of Youth community-based epidemiological study of CKD, cardio-cerebral vascular disease, hypertension, and diabetes mellitus (ISYS). MEDICC Rev. 2007;9(1):23-9.

The correct formula for MDRD appearing on page 27 is: MDRD GFR = 186.3 x serum creatinine (mg/dL)-1.154 x age-0.203 x 0.742 for females x 1.21 if the person is black.