Cut-off points to assess the strength of agreement
| Measure of agreement | Strength of agreement | ||
| Strong | Moderate | Weak | |
| Agreement of classification into quantiles | >75% correctly classified | 60–75% correctly classified | <60% correctly classified |
| Correspondence index | 0–0.25 | 0.25–0.45 | >0.45 |
| R2 values from regression | 0.49–1.0 | 0.25–0.49 | <0.25 |
| Correlation coefficients | 0.7–1.0 | 0.5–0.7 | <0.5 |
| Sensitivity | >80% | 65–80% | <65% |