Table 3 Agreement (ICC, 95% CI) between observed and predicted total scale scores using crosswalks based on the different IRT models in the calibration sample (n = 1791)
| Â | Rasch | Two-parameter | Multi-dimensional |
|---|---|---|---|
model | model | model | |
HAQ-SDI | 0.739 (0.717 to 0.760) | 0.741 (0.719 to 0.762) | 0.739 (0.717 to 0.760) |
HAQ-ADI | 0.737 (0.714 to 0.758) | 0.737 (0.715 to 0.758) | 0.735 (0.712 to 0.756) |
PF-10 (predicted from HAQ-SDI) | 0.746 (0.724 to 0.767) | 0.745 (0.722 to 0.765) | 0.742 (0.720 to 0.763) |
PF-10 (predicted from HAQ-ADI) | 0.748 (0.726 to 0.768) | 0.750 (0.728 to 0.770) | 0.749 (0.727 to 0.769) |