CKD classification by MDRD and CKD-EPI
| eGFR | MDRD | <15 | 15–29 | 30–59 | 60–89 | >90 | Totals |
| CKD-EPI | CKD stage | 5 | 4 | 3 | 2 | 1/0 | |
| A. Numbers | |||||||
| <15 | 5 | 328 | 53 | 0 | 0 | 0 | 381 |
| 15–29 | 4 | 4 | 1812 | 368 | 0 | 0 | 2184 |
| 30–59 | 3 | 0 | 30 | 21 936 | 973 | 0 | 22 939 |
| 60–89 | 2 | 0 | 0 | 3048 | 71 565 | 3621 | 78 234 |
| >90 | 1/0 | 0 | 0 | 0 | 24 070 | 47 863 | 71 933 |
| Totals | 332 | 1895 | 25 352 | 96 608 | 51 484 | 175 671 | |
| B. Percentages | |||||||
| <15 | 5 | 0.187 | 0.03 | 0 | 0 | 0 | 0.217 |
| 15–29 | 4 | 0.002 | 1.031 | 0.209 | 0 | 0 | 1.242 |
| 30–59 | 3 | 0 | 0.017 | 12.488 | 0.554 | 0 | 13.058 |
| 60–89 | 2 | 0 | 0 | 1.735 | 40.738 | 2.061 | 44.534 |
| >90 | 1/0 | 0 | 0 | 0 | 13.702 | 27.246 | 40.948 |
| Totals | 0.189 | 1.078 | 14.431 | 54.994 | 29.307 | 100 | |
Columns indicate results obtained using the MDRD formula and show the redistribution of patients in these CKD groups on the basis of eGFR (ml/min/1.73m2) when assessed using the CKD-EPI formula, shown in rows. ‘A’ shows the numbers of patients in each group and ‘B’ shows these numbers as a percentage of the total number of those tested. Figures in bold indicate those who do not change CKD category on the basis of eGFR with a change from the MDRD to the CKD-EPI formula. Below these, underlined figures indicate the numbers who move into a better CKD category and above and italicised figures indicate the numbers of patients who move into a worse CKD stage. Both CKD stages 1 and 2 require a structural or other abnormality in addition to the eGFR criteria.
CKD, chronic kidney disease; CKD-EPI, Chronic Kidney Disease-Epidemiology Collaboration; eGFR, estimated glomerular filtration rate; MDRD, Modification of Diet in Renal Disease.