Table 3.
Internal consistency and test-retest reliability of the Persian version of the Short Form McGill Pain Questionnaire-2
| Subscale | Number of Items | Item number | T1 (N=100) mean±SD | T2 (N=43) mean±SD | Cronbach's alpha (T1, T2) | (Intraclass Correlation Coefficient) | ||
|---|---|---|---|---|---|---|---|---|
| ICC | 95% CI | P value | ||||||
| Continuous | 6 | 1, 5, 6, 8, 9, 10 | 4.7±2.4 | 4.5±2.5 | 0.65, 0.75 | 0.90 | 0.82-0.95 | <0.001 |
| Intermittent | 6 | 2, 3, 4, 11, 16, 18 | 4.3±2.3 | 3.3±2.4 | 0.74, 0.81 | 0.87 | 0.75-0.93 | <0.001 |
| Neuropathic | 6 | 7, 17, 19, 20, 21, 22 | 4.0±2.4 | 3.5±2.1 | 0.70, 0.58 | 0.89 | 0.80-0.94 | <0.001 |
| Affective | 4 | 12, 13, 14, 15 | 5.8±2.8 | 5.0±3.0 | 0.73, 0.81 | 0.73 | 0.50-0.85 | <0.001 |
| Total | 22 | 4.6±2.0 | 4.0±2.1 | 0.88, 0.91 | 0.90 | 0.81-0.94 | <0.001 | |
T1=Test, T2=Retest, SD=Standard Deviation, ICC=Intraclass Correlation Coefficient, CI=Confidence Interval