Table 5. EMPRO results: psychometric values of each version of the DUFSS questionnaire.
| Attributes | 14-Items | 11-Items | 8-Items | 5-Items |
|---|---|---|---|---|
| Conceptual and measurement model | 35.71 | 54.76 | 35.71 | 35.71 |
| 1. Concept of measurement stated | +++I | +++I | +++I | +++I |
| 2. Obtaining and combining items described | ++ | +++ | ++ | ++ |
| 3. Rationality for dimensionality and scales | +++ | +++ | ++I | +++ |
| 4. Involvement of target population | + | ++ | + | + |
| 5. Scale variability described and adequate | + | +++ | +I | + |
| 6. Level of measurement described | ++ | ++ | ++ | ++ |
| 7. Procedures for deriving scores | ++ | ++ | ++ | ++ |
| Reliability | 41.66 | 70.83 | 44.44 | 25 |
| Internal consistency | 41.66 | 70.83 | 44.44 | 25 |
| 8. Data collection methods described | +++ | +++I | ++I | ++ |
| 9. Cronbach’s alpha adequate | ++++ | +++ | +++I | +++ |
| 10. IRT estimates provided | NI | +++ | NI | NI |
| 11. Testing in different populations | NI | +++ | NI | NI |
| Reproducibility | - | 45.83 | - | - |
| 12. Data collection methods described | NI | +++I | NI | NI |
| 13. Test–retest and time interval adequate | NI | ++ | NI | NI |
| 14. Reproducibility coefficients adequate | + | +++ | NI | NI |
| 15. IRT* estimates provided | NI | NI | NI | NI |
| Validity | 26.67 | 66.67 | 62.50 | 25 |
| 16. Content validity adequate | + | ++ | +I | + |
| 17. Construct/criterion validity adequate | ++ | +++I | ++I | ++ |
| 18. Sample composition described | +++ | +++I | ++++ | +++I |
| 19. Prior hypothesis stated | ++ | +++ | +++I | NI |
| 20. Rational for criterion validity | NA | NA | NA | ++ |
| 21. Tested in different populations | + | +++ | NA | + |
| Responsiveness | - | 33.33 | - | - |
| 22. Adequacy of methods | NI | +++ | NI | NI |
| 23. Description of estimated magnitude of change | NI | ++ | NI | NI |
| 24. Comparison of stable and unstable groups | NI | NI | NI | NI |
| Interpretability | 33.33 | 44.44 | 38.89 | 33.33 |
| 25. Rational of external criteria | ++ | +++ | ++I | ++ |
| 26. Description of interpretation strategies | NI | ++ | NI | NI |
| 27. How data should be reported stated | +++ | ++ | +++ | +++ |
| Overall score | 27.48 | 54.01 | 36.31 | 23.81 |
| Burden | ||||
| Burden: respondent | 33.33 | 66.67 | 38.89 | 33.33 |
| 28. Skills and time needed | +I | +++I | ++ | +I |
| 29. Impact on respondents | +I | ++I | ++ | +I |
| 30. Not suitable circumstances | +++ | +++ | ++I | +++ |
| Burden: administrative | 33.33 | 50.00 | 66.67 | 66.67 |
| 31. Resources required | NI | +++ | ++I | +++ |
| 32. Time required | NA | NA | NA | NA |
| 33. Training and expertise needed | NA | NA | NA | NA |
| 34. Burden of score calculation | +++ | ++ | +++I | +++ |
Ítems Score: + 1 point, I ½ point, NI no information, NA. not applicable.
*IRT (Item Response Theory)