Table 3 Correlations between items and for overall GHQ-12 scale
GHQ-12 items | Correlation of item with overall scale | Cronbach’s alpha if the item is eliminated |
|---|---|---|
1. Able to concentrate | 0.519 | 0.831 |
2. Lost much sleep | 0.324 | 0.845 |
3. Playing a useful part | 0.530 | 0.830 |
4. Capable of making decisions | 0.541 | 0.829 |
5. Under stress | 0.480 | 0.834 |
6. Could not overcome difficulties | 0.454 | 0.836 |
7. Enjoy your day-to-day activities | 0.478 | 0.834 |
8. Face up to problems | 0.589 | 0.826 |
9. Feeling unhappy and depressed | 0.537 | 0.830 |
10. Losing confidence | 0.440 | 0.837 |
11. Thinking of self as worthless | 0.609 | 0.824 |
12. Feeling reasonably happy | 0.606 | 0.825 |
Cronbach’s alpha | 0.844 |  |