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Table 1 Intra-rater agreement for ordinal radiographic feature scores (0–3) in individual joints

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

 

Joints

Osteophytes

Joint space narrowing

Left foot (n = 20)

Dorsoplantar view

1st Metatarsophalangeal joint

Kw = 0.5; pca = 53%

Kw = 0.6; pca = 81%

1st Cuneo-metatarsal joint

Kw = 0.4; pca = 48%

Kw = 0.5; pca = 57%

2nd Cuneo-metatarsal joint

Kw = 0.8; pca = 86%

Kw = 0.7; pca = 81%

Navicular 1st cuneiform joint

Kw = 0.5; pca = 67%

Kw = 0.6; pca = 76%

Talo-navicular joint

a

Kw = 0.2; pca = 67%

Right foot (n = 20)

Dorsoplantar view

1st Metatarsophalangeal joint

Kw = 0.6; pca = 62%

Kw = −0.1; pca = 33%

1st Cuneo-metatarsal joint

Kw = 0.5; pca = 57%

Kw = 0.5; pca = 62%

2nd Cuneo-metatarsal joint

Kw = 0.3; pca = 79%

Kw = 0.5; pca = 67%

Navicular 1st cuneiform joint

Kw = 0.6; pca = 86%

Kw = 0.6; pca = 71%

Talo-navicular jointa

a

Kw = 0.3; pca = 71%

  1. Key: Kw Stata pre-recorded weighting was used for kappa weighting disagreements, pca percentage agreement was based on all LFA categories (0–3)
  2. a Osteophyte scores for the talonavicular joints were not computed as this is not included within the AFA guidance