Table 2.
Summary of item analysis of the C19-YRS Thai version (N = 337)
| Item analysis | Criteria | Results | Interpretations |
|---|---|---|---|
| Corrected item–total correlations | |||
| Symptom severity | 0.30–0.70 | 0.320 to 0.557 (10 items) | Acceptable internal consistency |
|
0.143 (breathlessness at dressing) 0.036 (swallowing difficulty) 0.063 (continence) 0.246 (anxiety) 0.164 (PTSD) |
Not acceptable internal consistency | ||
| Functional ability | 0.495 to 0.537 (three items) | Acceptable internal consistency | |
|
0.284 (personal care) 0.143 (social role) |
Not acceptable internal consistency | ||
| Item–subscale correlations | |||
| Symptom severity | ≥ 0.5 | 0.444–0.750 (10 items) | Acceptable internal consistency |
| Functional ability | 0.427–0.957(three items) | ||
| Subscale–subscale correlation coefficients | |||
| Symptom severity-Functional ability | 0.40–0.65 | 0.594 | Acceptable |
| Subscale–total correlation coefficients | |||
| Symptom severity-total score | 0.55–0.88 | 0.906 | Higher than acceptable criteria |
| Functional ability-total score | 0.741 | Acceptable | |