Table 3 Intraobserver reliability of the CARDS classification of lumbar DS
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 |