0.97 for both dimensions). On average, 19 and 14 items were needed to estimate the precise disability levels using the initial CAT for the first and second dimension. However, a marginal increase in the standard error of the estimate across successive iterations substantially reduced the number of items required to make an estimate. Conclusion Using a combination approach of EFA and Rasch analysis this study has shown that it is possible to calibrate items onto a single metric in a way that can be used to provide the basis of a CAT application. Thus there is an opportunity to obtain a wide variety of information to evaluate the biopsychosocial model in its more complex forms, without necessarily increasing the burden of information collection for patients."/>
Total/section scores | θR-CAT Body Functions | θR-CAT Activity-Participation |
---|---|---|
WHODAS II – Understanding and communicating | 0.587** | 0.396** |
WHODAS II – Getting around | 0.437** | 0.801** |
WHODAS II – Self care | 0.391** | 0.642** |
WHODAS II – Getting along with people | 0.382** | 0.321** |
WHODAS II – Getting along with people (without sexual activities item) | 0.260* | 0.071 |
WHODAS II – Life activities (without work items) | 0.423** | 0.647** |
WHODAS II – Participation in society | 0.549** | 0.697** |
WHODAS II – Total (without work and sexual items) | 0.667 ** | 0.820** |
ODI | 0.531** | 0.724** |
RDQ | 0.639** | 0.748** |
NHP Energy | 0.595** | 0.424* |
NHP Pain | 0.659** | 0.547** |
NHP Emotional | 0.892** | 0.422** |
NHP Sleep | 0.737** | 0.424** |
NHP Social Isolation | 0.809** | 0.422** |
NHP Physical Mobility | 0.510** | 0.708** |