Crosswalk

Crosswalk value sets were developed by van Hout et al. [14] from a multicountry study of respondents who completed both the EQ-5D-3L and EQ-5D-5L in 2010. The crosswalk used a non-parametric response mapping method to predict values that are linked to the EQ-5D-3L value set. The decrements for the ‘equivalent’ levels of the two descriptive systems are the same. This means that the decrements for level 3 of the EQ-5D-5L (moderate problems) are the same as level 2 of the EQ-5D-3L (some problems), and those for level 5 of the EQ-5D-5L are the same as level 3 of the EQ-5D-3L. This means that the range of values is the same (55555 on the EQ-5D-5L has the same value as 33333 on the EQ-5D-3L, and an example intermediate state 35353 on the EQ-5D-5L has the same value as 23232 on the EQ-5D-3L). The crosswalk can link EQ-5D-5L data to a range of existing international EQ-5D-3L value sets. For the purposes of this paper, we focus on the crosswalk to the UK value set.