Table IV.

Canadian Orthopaedic Foot and Ankle Society reoperation and revision coding. ¹⁴

Variable	n (%)
Total cohort	503
Cases with no reoperations	491 (97.6)
Cases with reoperation	7 (1.4)*
Cases with revision	5 (1.0)
Reoperations by type
2: Hardware removal	N/A
3: Repeat operation outside the ankle arthroplasty	6 (1.2)
4: Debridement of gutters or heterotopic ossification	2 (0.4)
5: Exchange of polyethylene bearing	N/A
6: Debridement of osteolytic cysts	N/A
7: Deep infection requiring debridement, no metal component removal	N/A
9: Revision of metal components for aseptic loosening, fracture or malposition	4 (0.8)
10: Revision of metal components secondary to infection	1 (0.2)
11: Amputation above the level of the ankle	N/A

^*One ankle underwent two reoperations (subtalar fusion and lateral gutter debridement).

N/A, not applicable.