Table 4.
Item value and item-total correlations
| Y-BOCS-II-T item | Mean | SD | Corrected item–total correlation | Alpha if item deleted |
|---|---|---|---|---|
| 1. Time occupied by obsessions | 1.83 | 1.22 | 0.71 | 0.94 |
| 2. Obsession-free interval | 1.85 | 1.22 | 0.56 | 0.94 |
| 3. Control over obsessions | 2.24 | 1.39 | 0.82 | 0.93 |
| 4. Distress associated with obsessions | 2.07 | 1.42 | 0.89 | 0.93 |
| 5. Interference from obsessions | 1.76 | 1.30 | 0.85 | 0.93 |
| 6. Time spent on compulsions | 1.56 | 1.10 | 0.78 | 0.93 |
| 7. Resistance to compulsions | 1.56 | 1.53 | 0.49 | 0.95 |
| 8. Control over compulsions | 2.24 | 1.41 | 0.85 | 0.93 |
| 9. Distress if compulsions prevented | 1.71 | 1.25 | 0.81 | 0.93 |
| 10. Interference from compulsions | 1.61 | 1.18 | 0.84 | 0.93 |
Abbreviations: Y-BOCS-II-T, Thai version of the Yale–Brown Obsessive Compulsive Scale – Second Edition; SD, standard deviation.