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Table 4 Descriptive and reporting characteristics of methods used in calculating QALYs

From: The quality of reporting methods and results of cost-effectiveness analyses in Spain: a methodological systematic review

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