Pearson correlation coefficients to determine the precision of various measurements made
| Pearson Correlation Coefficient | |
|---|---|
| Intraobserver | |
| Reader 1 | 0.538 |
| Reader 2 | 0.648 |
| Interobserver | |
| First measurement of reader 1 vs 2nd measurement of reader 2 | 0.506 |
| Second measurement of reader 1 vs 1st measurement of reader 2 | 0.522 |
| Subjective (visual assessment) vs objective (OPA) technique | |
| Reader 1 | 0.499 |
| Reader 2 | 0.566 |