Table 3 QPS item-to-item and item-to-total correlations (Pearson correlations)
From: Initial psychometric validation of the questionnaire on pain caused by spasticity (QPS)
QPS module | Item-to-item correlation range | Item-to-total correlations | |
|---|---|---|---|
General pain item | Other four activity items | ||
Child self LL (n = 68) | −0.037 to 0.611 | 0.099 to 0.705 | 0.322 to 0.788 |
Child self UL (n = 30) | 0.003 to 0.698 | −0.022 to 0.702 | 0.392 to 0.745 |
Child interviewer LL (n = 40) | 0.178 to 0.490 | 0.316 to 0.549 | 0.734 to 0.817 |
Child interviewer UL (n = 14) | 0.387 to 0.754 | 0.676 to 0.859 | 0.867 to 0.913 |
Parent LL (n = 125) | 0.263 to 0.464 | 0.359 to 0.554 | 0.679 to 0.801 |
Parent UL (n = 52) | 0.304 to 0.526 | 0.179 to 0.640 | 0.531 to 0.842 |