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Table 1 Summary of the studies meeting inclusion criteria

From: Review of studies mapping from quality of life or clinical measures to EQ-5D: an online database

  Number (%) of mapping models
Total 121
Source instrument*
Barthel index 3 (2%)
28-joint disease activity score (DAS 28) 3 (2%)
Dermatology Life Quality Index (DLQI) 3 (2%)
European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ), all variants 12 (10%)
Functional Assessment of Cancer Therapy (FACT), all variants 5 (4%)
HAQ (including modified HAQ and HAQ-DI) 15 (12%)
Modified Rankin scale (mRS) 3 (2%)
Numerical rating scale or visual analogue 4 (3%)
Parkinson’s Disease Questionnaire (PDQ-8 & PDQ-39) 5 (4%)
Short form variants (SF-6D, SF-12, SF-36) 13 (11%)
25-item Visual Functioning Questionnaire (VFQ-25) 3 (2%)
Other generic measures 15 (12%)
Other condition specific measures 41 (34%)
Disease area
Cancer 16 (13%)
Cardiovascular 11 (9%)
Central nervous system 12 (10%)
Digestive system 5 (4%)
Eye conditions 3 (2%)
General population 16 (13%)
Mental health and behavioural disorders 4 (3%)
Musculoskeletal 28 (23%)
Respiratory system 3 (2%)
Skin 3 (2%)
Various 14 (12%)
Other 6 (5%)
Sample size (number of observations in the estimation sample, including repeated measurements of the same patients)  
< 200 21 (17%)
200-499 16 (13%)
500-999 13 (11%)
1000-4999 27 (22%)
5000-19,999 19 (16%)
20,000-99,999 4 (3%)
≥ 100,000 2 (2%)
Not clearly stated 19 (16%)
  1. *Numbers do not sum to the total as four studies predicted EQ-5D based on two instruments simultaneously (e.g. fitting a model predicting EQ-5D based on questions from both FACT and EORTC).