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Table 2 Renal function staged using the National Kidney Foundation classification (total number of subjects = 4514)

From: Use of renal risk drugs in a nation-wide Polish older adult population: an analysis of PolSenior database

CKD stage sMDRD (ml/min/1.73m2) CC (ml/min)
1 (eGFR ≥90); n (%) 1206 (26.7) 1048 (23.2)
2 (eGFR 60–89); n (%) 2453 (54.3) 1732 (38.4)
3 (eGFR 30–59); n (%) 800 (17.7) 1533 (34.0)
4 (eGFR 15–29); n (%) 50 (1.1) 187 (4.1)
5 (eGFR < 15); n (%) 5 (0.1) 14 (0.3)
  1. sMDRD short Modification of Diet in Renal Disease study equation; CC Creatinine clearance calculated with Cockcroft-Gault; CKD Chronic kidney disease