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Table 3 Frequency of radiographic foot OA according to Technique 1 and Technique 3 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%OA* (n) Technique 3%OA* (n) Technique 1–3
Difference %OA
Total number of participants
Left 1st MTPJ Dorsoplantar 27.1 (59) 38.1 (83) - 11.0 218
Lateral 22.9 (50) 23.4 (51) - 0.5 197
Combined 35.8 (78) 42.7 (93) - 6.9 218
1st CMJ Dorsoplantar 45.0 (98) 61.9 (135) - 16.9 213
Lateral 10.1 (22) 15.6 (34) - 5.5 213
Combined 49.1 (107) 65.1 (142) - 16.0 218
2nd CMJ Dorsoplantar 49.5 (108) 55.5 (121) - 6.0 144
Lateral 57.3 (125) 64.2 (140) - 6.9 143
Combined 74.3 (162) 79.4 (173) - 5.1 197
N1stCJ Dorsoplantar 19.3 (42) 69.3 (151) - 50.0 215
Lateral 11.0 (24) 16.1 (35) - 5.1 183
Combined 24.3 (53) 73.4 (160) - 49.1 217
TNJ Dorsoplantar 7.3 (16) 22.9 (50) - 15.6 218
Lateral 21.1 (46) 30.7 (67) - 9.6 217
Combined 24.3 (53) 43.6 (95) - 19.3 218
Right 1st MTPJ Dorsoplantar 33.0 (72) 46.3 (101) - 13.3 217
Lateral 27.5 (60) 28.9 (63) - 1.4 193
Combined 42.2 (92) 52.3 (114) - 10.1 217
1st CMJ Dorsoplantar 47.2 (103) 63.8 (139) - 6.6 215
Lateral 9.2 (20) 14.2 (31) - 5.0 215
Combined 49.5 (108) 66.5 (145) - 17.0 218
2nd CMJ Dorsoplantar 47.7 (104) 55.5 (121) - 7.8 138
Lateral 56.4 (123) 60.1 (131) - 3.7 142
Combined 70.6 (154) 74.8 (163) - 4.2 189
N1stCJ Dorsoplantar 17.9 (39) 72.5 (158) - 54.6 215
Lateral 8.7 (19) 12.8 (28) - 4.1 183
Combined 22.5 (49) 74.8 (163) - 52.3 216
TNJ Dorsoplantar 7.8 (17) 25.2 (55) - 17.4 218
Lateral 15.1 (33) 26.1 (57) - 11.0 217
Combined 18.3 (40) 39.9 (87) - 21.6 218
Both ALL 5 joints Dorsoplantar 81.2 (177) 92.7 (202) - 11.5 218
Lateral 83.5 (182) 89.9 (196) - 6.4 218
Combined 89.9 (196) 97.2 (212) - 7.3 218
  1. Key: 1st MTPJ first metatarsophalangeal joint, 1 st CMJ the first cuneiform-metatarsal joint, 2nd CMJ the second cuneiform-metatarsal joint, N1 st CJ the navicular-first cuneiform joint, TNJ talo-navicular joint
  2. *Positive diagnosis of radiographic osteoarthritis (AFA grade ≥ 2)