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Factors - metric
| Category | Factor | Mean | Min/Max | SD |
|---|---|---|---|---|
| Demography | Age | 50.9 | 19/74 | ± 12.4 |
| Comorbidities | CCI | 2.9 | 0/7 | ± 1.8 |
| ASA | 2.8 | 1/4 | ± 0.6 | |
| Intraoperative factors | Operation time (min) | 129 | 60/309 | ± 43.7 |
| Size of bone graft (cm2) | 164.9 | 30/310 | ± 55.1 | |
| Others | Time interval between surgeries (days) | 87.2 | 9/329 | ± 41.4 |
SD Standard deviation, CCI Charlson Comorbidity Index, ASA American Society of Anaesthesiologists risk classification
