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Table 2 intra- and inter-rater agreement for MTA and PA visual rating scales

From: Visual assessment of posterior atrophy development of a MRI rating scale

  MTA PA
Rater 1
Intra-rater Left 0.94 0.92
Agreement Right 0.94 0.92
Mean 0.95 0.93
Rater 2
Intra-rater Left 0.94 0.93
Agreement Right 0.91 0.93
Mean 0.94 0.95
Rater couple 1–2
Inter-rater Left 0.87 0.80
Agreement Right 0.90 0.84
Mean 0.90 0.84
Rater couple 1–3
Inter-rater Left 0.84 0.62
Agreement Right 0.82 0.67
Mean 0.86 0.65
Rater couple 2–3
Inter-rater Left 0.87 0.67
Agreement Right 0.85 0.70
Mean 0.90 0.70
  1. Intra-rater agreement was determined in 29 examinations for 2 raters, and inter-rater agreement was determined in 118 examinations for three rater pairings. For weighted-kappa values the degree of agreement was defined according to Landis and Koch [36] MTA medial temporal lobe atrophy, PA posterior atrophy