| IDC grade |
---|
| IDC 0 | IDC 1 | IDC 2 | IDC 3 |
---|
Number of CDVR | 0 | 1 – 2 | 3 – 4 | ≥ 5 |
- CDVR calcified discs visible on radiographs; IDC grade intervertebral disc calcification grade (Jensen and Christensen, 2000; Lappalainen et al., 2014); IDC 0 no, IDC 1 mild, IDC 2 moderate, IDC 3 severe intervertebral disc calcification based on number of CDVR