Table 2.
Comparison of patient characteristics and anesthesia time between ankle arthrodesis and total ankle arthroplasty groups
| Total (n = 2775) | Ankle arthrodesis (n = 2310) | Total ankle arthroplasty (n = 465) | P-value | |
|---|---|---|---|---|
| Age (years), mean ± SD | 65.7 ± 11.2 | 64.5 ± 11.4 | 69.1 ± 9.2 | < 0.001 |
| in osteoarthritis patients | 66.3 ± 11.6 | 65.4 ± 11.8 | 72.1 ± 8.3 | < 0.001 |
| in rheumatoid arthritis patients | 63.9 ± 9.9 | 63.8 ± 10.2 | 64.4 ± 8.6 | 0.452 |
| Sex (female) | 2022 (72.9 %) | 1633 (70.7 %) | 389 (83.7 %) | < 0.001 |
| Body mass index (kg/m2), mean ± SD | 24.4 ± 3.9 | 24.5 ± 4.0 | 24.2 ± 3.7 | 0.328 |
| Smoking | ||||
| Nonsmoker | 1931 (69.6 %) | 1590 (68.8 %) | 341 (73.3 %) | 0.043 |
| Ex or current smoker | 323 (11.6 %) | 284 (12.3 %) | 39 (8.4 %) | |
| Missing | 521 (18.8 %) | 436 (18.9 %) | 85 (18.3 %) | |
| Underlying diagnosis | ||||
| Osteoarthritis | 2042 (73.6 %) | 1756 (76.0 %) | 286 (61.5 %) | < 0.001 |
| Rheumatoid arthritis | 733 (26.4 %) | 554 (24.0 %) | 179 (38.5 %) | |
| Charlson Comorbidity Index | ||||
| 0 | 2472 (89.0 %) | 2049 (88.7 %) | 423 (91.0 %) | 0.153 |
| ≥ 1 | 303 (11.0 %) | 261 (11.3 %) | 42 (9.0 %) | |
| Anesthesia time (minutes), mean ± SD | 199 ± 91 | 199 ± 93 | 200 ± 84 | 0.127 |
The values in bold indicate significant differences at the 0.007 (=0.05/7) significance level