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Comparison of fatty infiltration on MRI.
| Fatty infiltration of supraspinatus muscle belly (Goutallier classification) | Primary repair (n) | Partial repair (n) | P value |
|---|---|---|---|
| Preoperative | |||
| Stage 0 | 0 | 0 | <.001 |
| Stage 1 | 57 | 4 | |
| Stage 2 | 54 | 19 | |
| Stage 3 | 14 | 1 | |
| Stage 4 | 1 | 6 | |
| 10 years postoperative | |||
| Stage 0 | 0 | 0 | <.001 |
| Stage 1 | 19 | 1 | |
| Stage 2 | 51 | 2 | |
| Stage 3 | 33 | 14 | |
| Stage 4 | 23 | 13 |
