Table 3. Analysis of items in BSI-18.
| Mean | SD* | Percentage of answers to items | |||||
|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | |||
| 1. Faintness or dizziness | 0.93 | 1.14 | 49.4 | 24.2 | 13.4 | 9.9 | 3.2 |
| 2. Feeling no interest in things | 1.12 | 1.28 | 43.9 | 24.5 | 14.3 | 9.9 | 7.3 |
| 3. Nervousness or shakiness | 1.24 | 1.34 | 42.7 | 20.1 | 16.6 | 12.1 | 8.6 |
| 4. Pain in heart or chest | 1.44 | 1.31 | 31.8 | 24.5 | 21.0 | 13.1 | 9.6 |
| 5. Feeling lonely | 1.75 | 1.40 | 25.5 | 22.3 | 18.5 | 19.1 | 14.6 |
| 6. Feeling tense or keyed up | 1.42 | 1.23 | 27.1 | 31.5 | 22.0 | 10.8 | 8.6 |
| 7. Nausea or upset stomach | 1.31 | 1.31 | 38.9 | 20.1 | 20.1 | 13.7 | 7.3 |
| 8. Feeling blue | 2.49 | 1.19 | 5.4 | 16.9 | 25.8 | 26.8 | 25.2 |
| 9. Suddenly scared for no reason | 1.04 | 1.29 | 49.4 | 21.7 | 12.1 | 9.2 | 7.6 |
| 10. Trouble getting one's breath | 1.02 | 1.19 | 48.1 | 20.1 | 17.5 | 10.8 | 3.5 |
| 11. Feeling worthless | 0.61 | 1.16 | 71.3 | 12.1 | 7.3 | 2.5 | 6.7 |
| 12. Spells of terror or panic | 0.53 | 1.02 | 72.0 | 13.4 | 7.6 | 3.5 | 3.5 |
| 13. Numbness or tingling in parts of one's body | 1.64 | 1.34 | 25.2 | 25.5 | 22.3 | 14.3 | 12.7 |
| 14. Feeling hopeless about the future | 0.69 | 1.14 | 64.6 | 17.5 | 6.7 | 6.4 | 4.8 |
| 15. Feeling so restless that one could not sit still | 0.94 | 1.18 | 49.7 | 24.5 | 12.7 | 8.0 | 5.1 |
| 16. Feeling weak in parts of on's body | 1.26 | 1.27 | 37.3 | 25.5 | 18.8 | 10.8 | 7.6 |
| 17. Thoughts of ending one's life | 0.44 | 1.05 | 81.8 | 5.7 | 3.2 | 5.4 | 3.8 |
| 18. Feeling fearful | 1.21 | 1.30 | 40.1 | 25.5 | 16.9 | 8.6 | 8.9 |
| BSI-18 | 19.84 | 13.730 | 43.5 | 32.4 | 16.2 | 7.3 | 0.6 |
Note. *SD: Standard deviation. †0 = not at all; ‡1= a little; §2 = moderately; ||3 = quite a lot; ¶4 = a lot.