Table 3.
Classification and the risk of progression to ESRD according to the combination of the clinical-grade and O-grade.
| Clinical grade | Oxford classification grade | ||
|---|---|---|---|
| O-grade I | O-grade II | O-grade III | |
| C-grade I | |||
| Incidence of ESRD (%) | 0/153 (0) | 3/163 (1.8) | 1/7 (14) |
| HR (95% CI) | 0.79 (0.13–4.7) | 6.3 (0.57–69) | |
| P value | 0.80 | 0.13 | |
| C-grade II | |||
| Incidence of ESRD (%) | 2/78 (2.6) | 12/250 (4.8) | 3/37 (8.1) |
| HR (95% CI) | 1 | 1.9 (0.43–8.6) | 3.0 (0.50–18) |
| P value | 0.39 | 0.23 | |
| C-grade III | |||
| Incidence of ESRD (%) | 6/19 (32) | 32/105 (30) | 14/42 (33) |
| HR (95% CI) | 13.3 (2.7–66) | 13.7 (3.3–57) | 15.2 (3.5–67) |
| P value | 0.0015 | < 0.001 | < 0.001 |
O-grade a new grading system utilising the total score of each variable in the Oxford classification (MEST-C) and the renal survival rate, C-grade a grading system which was based on the Japanese clinical classification, HR hazard ratio, 95% CI 95% confidence interval, ESRD end-stage renal disease.