Skip to main content

Table 2 Frequency of radiographic foot OA according to Technique 1 and Technique 2 scoring methods

From: The effect of variation in interpretation of the La Trobe radiographic foot atlas on the prevalence of foot osteoarthritis in older women: the Chingford general population cohort

Foot Joints Radiographic view Technique 1%OAa (n) Number of ungradable jointsb Technique 2%OAa (n) Technique 1–2
Difference %OA
Total number of participants
Left 1st MTPJ Dorsoplantar 27.1 (59) 0 27.1 (59) 0.0 218
Lateral 22.9 (50) 21 13.7 (27) 7.2 197
Combined 35.8 (78) 0 31.2 (68) 4.6 218
1st CMJ Dorsoplantar 45.0 (98) 5 43.2 (92) 1.8 213
Lateral 10.1 (22) 5 8.5 (18) 1.6 213
Combined 49.1 (107) 0 45.9 (100) 3.2 218
2nd CMJ Dorsoplantar 49.5 (108) 74 30.6 (44) 18.9 144
Lateral 57.3 (125) 75 27.3 (39) 30.0 143
Combined 74.3 (162) 21 38.1 (75) 36.2 197
N1stCJ Dorsoplantar 19.3 (42) 3 18.1 (39) 1.2 215
Lateral 11.0 (24) 35 8.7 (16) 2.3 183
Combined 24.3 (53) 1 21.2 (46) 3.1 217
TNJ Dorsoplantar 7.3 (16) 0 7.3 (16) 0.0 218
Lateral 21.1 (46) 1 19.8 (43) 1.3 217
Combined 24.3 (53) 0 22.9 (50) 1.4 218
Right 1st MTPJ Dorsoplantar 33.0 (72) 1 32.7 (71) 0.3 217
Lateral 27.5 (60) 25 16.1 (31) 11.4 193
Combined 42.2 (92) 1 35.9 (78) 6.3 217
1st CMJ Dorsoplantar 47.2 (103) 3 46.0 (99) 1.2 215
Lateral 9.2 (20) 3 7.4 (16) 1.8 215
Combined 49.5 (108) 0 46.3 (101) 3.2 218
2nd CMJ Dorsoplantar 47.7 (104) 80 29.7 (41) 18.0 138
Lateral 56.4 (123) 76 22.5 (32) 33.9 142
Combined 70.6 (154) 29 34.4 (65) 36.2 189
N1stCJ Dorsoplantar 17.9 (39) 3 16.7 (36) 1.2 215
Lateral 8.7 (19) 35 6.6 (12) 2.1 183
Combined 22.5 (49) 2 20.4 (44) 2.1 216
TNJ Dorsoplantar 7.8 (17) 0 7.8 (17) 0.0 218
Lateral 15.1 (33) 1 14.7 (32) 0.4 217
Combined 18.3 (40) 0 17.9 (39) 0.4 218
Both ALL 5 joints Dorsoplantar 81.2 (177) 0 78.4 (171) 2.8 218
Lateral 83.5 (182) 0 57.3 (125) 26.2 218
Combined 89.9 (196) 0 83.5 (182) 6.4 218
  1. Key: 1st MTPJ first metatarsophalangeal joint, 1 st CMJ the first cuneiform-metatarsal joint, 2nd CMJ the second cuneiform-metatarsal joint, N1stCJ the navicular-first cuneiform joint, TNJ talo-navicular joint
  2. aPositive diagnosis of radiographic osteoarthritis (AFA grade ≥ 2)
  3. b to be counted as an ‘ungradable’ joint issues with the scoring of both OP and JSN features in the view being examined had been documented