Table 2.
Prevalence of features of radiographic ankle osteoarthritis.
| Abnormality n (%) | Talocrural joint | Subtalar joint | Talonavicular jointa | Total N = 231 |
|---|---|---|---|---|
| Osteophyte | ||||
| None | 120 (51.9%) | 227 (98.3%) | 151 (65.4%) | 96 (41.6%) |
| Possibly | 68 (29.4%) | 3 (1.3%) | 43 (18.6%) | 69 (29.9%) |
| Evident | 43 (18.6%) | 1 (0.4%) | 36 (15.6%) | 66 (28.6%) |
| Subchondral cyst | ||||
| Absent | 224 (97.0%) | 231 (100.0%) | 224 (97.0%) | 219 (94.8%) |
| Present | 7 (3.0%) | 0 (0%) | 6 (2.6%) | 12 (5.2%) |
| Sclerosis | ||||
| None | 213 (92.2%) | 223 (96.5%) | 120 (51.9%) | 113 (48.9%) |
| Possibly | 14 (6.1%) | 8 (3.5%) | 106 (45.9%) | 110 (47.6%) |
| Evident | 4 (1.7%) | 0 (0.0%) | 4 (1.7%) | 8 (3.5%) |
| Joint space narrowing | ||||
| None | 178 (77.1%) | 228 (98.7%) | 181 (78.4%) | 152 (65.8%) |
| Possibly | 37 (16.0%) | 3 (1.3%) | 37 (16.0%) | 54 (23.4%) |
| Moderate | 10 (4.3%) | 0 (0.0%) | 12 (5.2%) | 19 (8.2%) |
| Severe | 6 (2.6%) | 0 (0.0%) | 0 (0.0%) | 6 (2.6%) |
| KL-scoreb | ||||
| Normal | 127 (55.0%) | 227 (98.3%) | 154 (66.7%) | 104 (45.0%) |
| Grade 1 | 67 (29.0%) | 4 (1.7%) | 48 (20.8%) | 70 (30.3%) |
| Grade 2 | 30 (13.0%) | 0 (0.0%) | 26 (11.3%) | 48 (20.8%) |
| Grade 3 | 4 (1.7%) | 0 (0.0%) | 2 (0.9%) | 6 (2.6%) |
| Grade 4 | 3 (1.3%) | 0 (0.0%) | 0 (0.0%) | 3 (1.3%) |
a
Missing data: n = 1 (0.4%) for talonavicular joint.
b
KL, Kellgren & Lawrence.