Table 2. Final agreement (vertebral number and percentage) between the six learner readers and reference reading.
| Variable | OVD absolute agree* | OVD relative agree* | OVD disagree by >1 grade* | ≥ mild OVD missed* | False (+) OVD# |
|---|---|---|---|---|---|
| I1 | 43 (66.2%) | 57 (87.7%) | 2 (3.1%) | 1/1.6% | 1/0.36% |
| I2 | 39 (60%) | 54 (83.1%) | 4 (6.2%) | 0 | 0 |
| I3 | 30 (46.2%) | 51 (78.5%) | 7 (10.8%) | 0 | 0 |
| C1 | 42 (63.6%) | 60 (90.9%) | 4 (6.1%) | 0 | 4 (1.4%) |
| C2 | 45 (68.2%) | 61 (92.5%) | 0 | 3 (4.5%) | 0 |
| C3 | 42 (63.6%) | 59 (89.4%) | 4 (6.1%) | 2 (3.0%) | 2 (0.7%) |
OVD absolute agree: exactly the same grading as the reference reading; OVD relative agree: compared with the reference reading, one grade difference is allowed; OVD disagree by >1 grade: disagreement by more than one grade, for example, a mild grade is marked as mod/s grade; ≥ mild OVD missed: mild grade OVD were missed with C2 missed one severe OVD (due to oversight). *, out of total true OVD; #, falsely marked as OVD out of total vertebrae with no OVD. OVD, osteoporotic vertebral deformity.