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Comparison of the Failure Rate between Early and Late Periods
| Variable | Early period | Late period | p-valuea) |
|---|---|---|---|
| Undercorrection | 7/50 (14) | 6/50 (12) | 0.599 |
| Overcorrection | 15/50 (30) | 20/50 (40) | 0.626 |
| Posterior slope | 12/50 (24) | 6/50 (12) | 0.118 |
| Lateral hinge fracture | 14/50 (28) | 7/50 (14) | 0.300 |
Values are presented as number (%).
Fisher exact test was performed to compare the failure rate between the two periods.
