Table 2.
Factor analysis breakdown of the CSI-BP with the specific items that contributed to each factor (n=285)
| CSI-BP items | Mean (SD) | Physical symptoms | Emotional distress | Headache/jaw symptoms | Urological symptoms | Items not loading on factors |
|---|---|---|---|---|---|---|
| 1. Unrefreshed in the morning | 2.39 (1.18) | 0.44 | ||||
| 2. Muscles stiff/achy | 2.72 (1.05) | 0.88 | ||||
| 3. Anxiety attacks | 2.12 (1.13) | 0.44 | ||||
| 4. Grind clench/teeth | 1.67 (1.43) | 0.5 | ||||
| 5. Diarrhea/constipation | 1.79 (1.23) | 0.47 | ||||
| 6. Need help with daily activities | 1.35 (1.41) | 0.59 | ||||
| 7. Sensitive to bright lights | 1.75 (1.41) | 0.5 | ||||
| 8. Easily tired with physical activity | 2.39 (1.28) | 0.73 | ||||
| 9. Pain all over body | 1.97 (.137) | 0.77 | ||||
| 10. Headaches | 1.95 (1.12) | 0.6 | ||||
| 11. Bladder/urination pain | 0.69 (1.01) | 0.64 | ||||
| 12. Do not sleep well | 2.17 (1.18) | 0.49 | ||||
| 13. Difficulty concentrating | 2.09 (1.09) | 0.78 | ||||
| 14. Skin problems | 1.74 (1.42) | X | ||||
| 15. Stress makes symptoms worse | 2.70 (1.32) | 0.5 | ||||
| 16. Sad or depressed | 1.94 (1.0) | 0.67 | ||||
| 17. Low energy | 2.13 (1.10) | 0.46 | ||||
| 18. Tension, neck and shoulders | 2.80 (1.15) | 0.63 | ||||
| 19. Pain in jaw | 0.55 (1.00) | 0.48 | ||||
| 20. Certain smells make dizzy | 1.22 (1.27) | 0.64 | ||||
| 21. Urinate frequently | 1.78 (1.30) | 0.63 | ||||
| 22. Restless legs | 1.87 (1.49) | 0.42 | ||||
| 23. Poor memory | 2.04 (1.12) | 0.72 | ||||
| 24. Trauma as child | 1.21 (1.34) | 0.51 | ||||
| 25. Pelvic pain | 1.26 (1.35) | 0.49 |
Notes: The following variance was found for each factor: factor 1 (physical symptoms) 32.81%, factor 2 (headache/jaw symptoms) 5.36%, factor 3 (emotional distress) 6.09%, and factor 4 (urological symptoms) 4.94%. The confirmatory factor analysis revealed that all items were significantly related to their specified factors, verifying the hypothesized relationships among the item and latent factors. It was noted that three items on the original English CSI did not load on any of the four factors, including items 1 (unrefreshed from sleeping), 5 (problems with diarrhea and/or constipation), and 14 (skin problems). With the CSI-BP, however, item 1 was retained in factor 1 and item 5 retained in factor 4. Item 14 did not load any of the four factors. X, excluded item in the factorial analysis.
Abbreviations: CSI, Central Sensitization Inventory; CSI-BP, Central Sensitization Inventory – Brazilian population.