Summary statistics for PEJC and PDS of the three reading procedures
| Variable | Reading procedure | Mean | SD | Min | Max | |
| Difference of eroded joint count (PEJC) | single | 2.04 | 3.93 | −14 | 18 | |
| paired | 1.87 | 3.07 | −8 | 18 | ||
| chronological | 2.41 | 3.52 | −2 | 21 | ||
| Difference of damage score (PDS) | single | 6.31 | 15.58 | −35 | 63 | |
| paired | 5.30 | 9.10 | −18 | 55 | ||
| chronological | 6.97 | 9.61 | −11 | 44 | ||