Table 2 Items of the General Health Questionnaire (GHQ12)

1. Able to concentrate

2. Lost much sleep

3. Playing useful part

4. Capable of making decisions

5. Under stress

6. Could not overcome difficulties

7. Enjoy normal activities

8. Face up to problems

9. Feeling unhappy and depressed

10. Losing confidence

11. Thinking of oneself as worthless

12. Feeling reasonably happy