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Table 2 Parameters of the graded response model

From: Validation of the EQ-5D in Taiwan using item response theory

Domaina Information parameter Location parameter
D1 6.56 -2.24
D2 7.44 -2.58
D3 8.66 -2.19
D4 1.94 -1.72
D5 1.98 -2.35
D6 1.49 -5.67, -4.70, -4.42, -4.05, -3.60,
-2.61, -1.74, -0.91, 0.29, 1.70
  1. aD1-D5 rescaled as 0 (for those who answered 2 or 3) and 1; D6 rescaled as 0-10 (0 stands for less than 5; 1 stands for 5-15; … ; 10 stands for more than 95)