Table 4 Descriptive and reporting characteristics of methods used in calculating QALYs
Category | Characteristic | Number | Percent |
|---|---|---|---|
Health-state classification system | EuroQoL-5D | 82 | 36.8 |
SF-36 | 6 | 2.7 | |
Rosser scale | 6 | 2.7 | |
Health Utility Index (HUI) | 2 | 0.9 | |
Other | 13 | 5.8 | |
Not reported | 114 | 51.1 | |
Source of preferences | Patient/caregiver | 103 | 46.2 |
Community | 10 | 4.5 | |
Clinician/author | 2 | 0.9 | |
Not reported | 108 | 48.4 | |
Measurement technique used for valuing health state | Time tradeoff (TTO) | 22 | 9.9 |
Visual analogue scale (VAS) | 12 | 5.4 | |
Standard gamble (SG) | 5 | 2.2 | |
Tariffs for classification | 4 | 1.8 | |
Not reported | 182 | 81.6 | |
Country/region of reference for utility weights | National/local population (e.g. Spain) | 50 | 22.4 |
Citation of the international literature | 143 | 64.1 | |
Not reported | 30 | 13.5 |