Table 1 Data use per statistical test
|  | Main study | Additional test–retest data | Routine Outcome Measurement data | TOTAL |
|---|---|---|---|---|
Total available data | 124 participants with 220 measurements | 25 participants with 50 measurements | 615 participants with 2,593 measurements | 764 participants with 2863 measurements |
Participant characteristics | 124 participants with 124 measurements (baseline) | Â | Â | Â |
Descriptive statistics and normal distribution | 124 participants with 220 measurements | Â | 615 participants with 2,593 measurements | 739 participants with 2813 measurements |
Test–retest reliability | 14 participants with 28 measurements | 25 participants with 50 measurements |  | 39 participants with 78 measurements |
Internal consistency | 124 participants with 124 measurements (baseline) | Â | 615 participants with 615 measurements (baseline) | 739 participants with 739 measurements |
Factor analysis | 124 participants with 124 measurements | Â | 615 participants with 615 measurements | 739 participants with 739 measurements |
Convergent and divergent validity | 124 participants with 127–217 measurements (due to missing data) |  |  | 124 participants with 127–217 measurements (due to missing data) |
Discrimintant validity | 124 participants with 124 measurements (baseline) | Â | Â | Â |
Sensitivity to change | 64 participants with 128 measurements (after three months) 32 participants with 64 measurements (after six months) | Â | 291 participants with 582 measurements (after three months) 156 participants with 312 measurements (after six months) | 255 participants with 710 measurements (after three months) 188 participants with 376 measurements (after six months) |