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Table 3 Intraobserver reliability of the CARDS classification of lumbar DS

From: Comparison of the French and CARDS classifications for lumbar degenerative spondylolisthesis: reliability and validity

  Cases in agreement between first and second observation
Grader 1 Grader 2 Grader 3 Grader 4
Type A1 6 7 5 6
Type A2 8 8 9 7
Type B1 16 20 14 18
Type B2 12 13 17 16
Type C1 39 38 43 37
Type C2 21 24 20 23
Type D1 15 19 16 15
Type D2 8 10 9 6
Total 125 139 133 128
κ value 0.823 0.931 0.897 0.829