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Mean duration and range from index operation to revision in months
| Indication for revision | Duration to primary revision in months (range) | Duration to secondary revision in months (range) | p |
|---|---|---|---|
| PJI | 49.00 (0–279) | 28.11 (0–198) | 0.000 |
| Instability | 37.67 (2–226) | 31.48 (4–153) | 0.301 |
| Aseptic loosening | 94.68 (5–242) | 31.05 (1–163) | 0.000 |
| Retropatellar arthrosis | 24.54 (3–106) | 19.53 (3–58) | 0.677 |
