Table 3 Psychometric Analysis
Comparisons from the TAQ with Strong Correlations (≥ 0.80) | Inter-item Correlations | |
|---|---|---|
Item 2: Be effective in treating psoriasis for skin and other areas | Item 3: Be safe for long-term use | 0.805 |
Item 2: Be effective in treating psoriasis for skin and other areas | Item 4: Not lose effectiveness over time | 0.802 |
Item 3: Be safe for long term use | Item 4: Not lose effectiveness over time | 0.823 |
Item 3: Be safe for long term use | Item 10: Relieve the itching | 0.842 |
Item 6: Be easy to include in your (a patient’s) normal routine | Item 7: Be simple and quick to administer | 0.851 |
Analysis of Known-Groups Validity | ||
Known-Group | TAQ Total Mean (SD) Score (n = 197) | P-value |
DLQI | ||
No or small effect on patient’s life | 44.3 (12.73) | 0.0072 |
Moderate effect on patient’s life | 46.3 (8.38) | |
Very large effect on patient’s life | 49.2 (7.63) | |
Extremely large effect on patient’s life | 52.6 (6.38) | |
CGI-S | ||
Mild | 47.2 (10.65) | 0.8106 |
Moderate | 46.8 (9.12) | |
Severe | 47.8 (8.85) | |