Table 1.
Baseline Characteristics of the Total Group and Varus and Valgus Osteoarthritis Subgroups a
| Outcome Measure | Total Group (N = 294) | Varus OA Group (n = 235) | Valgus OA Group (n = 59) |
|---|---|---|---|
| Mean age at surgery, y (SD) | 50.3 (9.2) | 51.1 (8.9) | 47.1 (9.7) |
| Mean follow-up, y (SD) | 3.7 (1.0) | 3.8 (1.0) | 3.5 (1.0) |
| Sex, female (%) | 120 (41) | 73 (31) | 47 (80) |
| Mean BMI, kg/m2 (SD) | 27.5 (4.4) | 27.5 (4.5) | 27.5 (4.2) |
| Side, right (%) | 151 (51) | 115 (49) | 36 (61) |
| ASA classification, n (%) | |||
| I | 171 (58) | 137 (58) | 34 (58) |
| II | 122 (41) | 97 (41) | 25 (42) |
| III | 1 (1) | 1 (1) | — |
| Osteotomy type, n (%) | |||
| Medial owHTO | 235 (80) | 235 (100) | — |
| Medial cwHTO | 58 (20) | — | 58 (98) |
| Lateral owHTO | 1 (1) | — | 1 (2) |
| Wedge size, mm (SD) | |||
| Medial owHTO | 10.0 (3.0) | 10.0 (3.0) | — |
| Medial cwHTO | 6.7 (2.1) | — | 6.7 (2.1) |
| Lateral cwHTO | — | — b | |
| Revision surgery, yes (%) | 20 (7) | 13 (6) | 7 (12) |
| Revision osteotomy | 2 | 2 | — |
| Non-union | 3 | 3 | — |
| TKA | 11 | 5 | 6 |
| Arthroscopic debridement | 2 | 2 | — |
| Meniscectomy | 1 | 1 | — |
| MUA | 1 | — | 1 |
| Hardware removal, yes (%) | 153 (52) | 114 (49) | 38 (64) |
| Timing of hardware removal, y (SD) | 1.1 (0.6) | 1.3 (0.6) | 0.8 (0.4) |
a
ASA, American Society of Anesthesiologists; BMI, body mass index; cw, closing wedge; HTO, high tibial osteotomy; MUA, manipulation under anesthesia; OA, osteoarthritis; ow, opening wedge; TKA, total knee arthroplasty; —, no data available.
b
Wedge size not reported in the patient’s file.