Table 1 Sources of item identification of the included instruments (n = 104)1)
Sources of item identification | n | % |
|---|---|---|
Adaptation of existing scales only | 18 | 17.3% |
Patients & experts & literature (unsystematic search)1) | 13 | 12.5% |
Patients only | 12 | 11.5% |
Literature only (unsystematic search) | 10 | 9.6% |
Experts and literature (unsystematic search) | 7 | 6.7% |
Patients and literature (unsystematic search) | 6 | 5.8% |
Adaptation and literature (unsystematic search) | 4 | 3.8% |
Patients and experts | 4 | 3.8% |
Experts only | 3 | 2.9% |
Experts and adaptation and literature (unsystematic search) | 2 | 1.9% |
Patients and adaptation | 2 | 1.9% |
Adaptation and literature (systematic search) | 1 | 1% |
Adaptation and experts | 1 | 1% |
Patients and adaptation and literature (unsystematic search) | 1 | 1% |
Patients and experts and adaptation | 1 | 1% |
Significant others and literature (unsystematic search) and adaptation | 1 | 1% |
Not reported/not clearly described | 18 | 17.3% |