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Number of hips progressed to collapse at follow-up, rate of collapse and time to collapse for each Ficat stage.
| Ficat stage at onset of treatment |
Follow-up period (yrs) |
Rate of collapse (%) | Mean time (rang) to collapse (yrs) |
||||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | |||
| I (n = 16) | 0 | 0 | 0 | 1 | 1 | 12.5 (2/16) | 3.5 (1 to 5) |
| II (n = 52) | 3 | 4 | 4 | 6 | 7 | 46.15 (24/52) | 4.5 (4 to 5) |
| Total (n = 78) | 3 | 4 | 4 | 7 | 8 | 38.24 (26/68) | 3.4 (1 to 5) |
