Table 4.
Goodness of fit to the Rasch Model and individual item fit of the COVID-19 health literacy questionnaire (CHL-Q)
| Attribute | Criteria | CHL-Q index | |
|---|---|---|---|
| Item fit residual | Mean | 0 | 0.139 |
| SD | 1 | 0.506 | |
| Person fit residual | Mean | 0 | − 0.556 |
| SD | 1 | 1.632 | |
| Item-trait | χ2(df) | Low | 34.67 (32) |
| interaction | p value | NS | 0.342 |
| PSI | > 0.70 | 0.775 | |
| Unidimensionality | Independent t-tests | < 5% | 6.67% |
| CI 95% Binomial | * | 0.042–0.091 |
| Item | Location | Standard error | Fit residual | Chi-square (df = 4) | p value |
|---|---|---|---|---|---|
| 1. Find information about symptoms of COVID-19 | − 0.499 | 0.1 | 0.393 | 0.913 | 0.923 |
| 2. Find out about political decisions on restrictions related to coronavirus/COVID-19 | − 0.177 | 0.100 | − 0.150 | 3.219 | 0.522 |
| 3. Find out what to do in case you suspect you have COVID-19 | − 0.176 | 0.101 | − 0.429 | 3.304 | 0.508 |
| 4. Understand what authorities say about the coronavirus/ COVID-19 | 0.600 | 0.088 | 0.357 | 10.480 | 0.033 |
| 5. Understand what authorities say about coronavirus/ COVID-19 restrictions and recommendations | − 0.005 | 0.093 | 0.001 | 2.637 | 0.620 |
| 7. Judge when you need to go to the doctor for non-COVID-19 related problems | 0.354 | 0.094 | 0.771 | 1.886 | 0.757 |
| 8. Follow the recommendations on how to protect yourself from coronavirus/COVID-19 | − 0.422 | 0.102 | − 0.565 | 10.325 | 0.035 |
| 9. Decide when to stay at home from social activities/ work/school, and when not to | 0.325 | 0.089 | 0.737 | 1.910 | 0.752 |
* Lower bond should be ≤ 0.05. SD: Standard Deviation; NS: non-significant. PSI: Personal Separation Index; CHL-Q: COVID-19 health literacy questionnaire