Table 4.
Unplanned reoperations within 5 years – early cohort vs. late cohort
| Index Surgery in 01/2001-12/2002 (N = 913) |
Index Surgery in 01/2006-12/2007 Set (N = 1729) |
|||
|---|---|---|---|---|
| Ankle Arthrodesis | Patients (N = 741), n (%)* |
Surgeries n** |
Patients (N = 1168), n (%)* |
Surgeries n** |
| Rearthrodesis | 88 (12) | 105 | 161 (14) | 290 |
| Osteosynthesis of the bone | 42 (6) | 46 | 129 (11) | 161 |
| Operations on the skin and subcutaneous tissue | 24 (3) | 41 | 67 (6) | 114 |
| Conversion to total ankle replacement | 4 (1) | 4 | 4 (0.3) | 4 |
| Sum of patients with unplanned reoperations/sum of surgeries | 122 (17***) | 196 | 246 (21***) | 569 |
| Total Ankle Replacement |
Patients (N = 172), n (%)* |
Surgeries n** |
Patients (N = 561), n (%)* |
Surgeries n** |
| Conversion to ankle arthrodesis | 23 (13) | 26 | 60 (11) | 70 |
| Removal of total ankle replacement | 20 (12) | 20 | 58 (10) | 58 |
| Revision of total ankle replacement or individual components | 11 (6) | 14 | 58 (10) | 67 |
| Exposure of total ankle replacement without replacement | 7 (4) | 8 | 26 (5) | 28 |
| Operations on the skin and subcutaneous tissue | 10 (6) | 12 | 23 (4) | 24 |
| Sum of patients with unplanned reoperations/sum of surgeries | 43 (25***) | 80 | 130 (23***) | 247 |
*=Number (Proportion) of patients with at least one event, **=Number of surgeries
***=Patients with different types of surgeries are only counted once in the sum - for this reason, the sum of patients does not correspond to the sum of number of patients in the subcategories