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| Variable | R | Sig. |
| Year 1 Modality | 0.655 | 0.008 |
| Diabetes | 0.424 | 0.115 |
| Year 1 Smoker | 0.499 | 0.058 |
| Year 1 Urea | −0.522 | 0.046 |
| Baseline MCSA | −0.375 | 0.169 |
| Year 1% change MCSA | −0.520 | 0.047 |
