| Creatinine | Case | Control | ||
| Size | % | Size | % | |
| >0.6 | 0 | 0 | 2 | 6.7 |
| 0.6 - 1.4* | 13 | 43.3 | 27 | 90 |
| <1.4 | 17 | 56.7 | 1 | 3.3 |
| Total | 30 | 100 | 30 | 100 |