European Quality of Life 5 Dimensions (EQ-5D) is a self-reported health outcome which measures mobility, self care, usual activities, pain discomfort, anxiety depression. An overall score is derived that measures from -0.59 (worst) to +1 (best).
In addition, health state is measured on the thermometer scale (score 0 to 100) with higher scores representing better health status.
Read more: http://www.clinicaltrials.gov/ct2/show/NCT01083693?cond=%22Arthritis%22&lup_s=07/28/2011&lup_d=30
