How are value sets obtained?
EQ-5D value sets are created by conducting a valuation study. In an EQ-5D valuation study, respondents (often members of the general public) are asked to indicate how good or bad some of the EQ-5D health states are. The answers are then combined into a statistical model, with which the value set is created.
An international valuation protocol for EQ-5D-Y is now available and a number of value sets are in development around the world. See here for the currently published EQ-5D-Y value sets.