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Table 3 Results of the first stage analysis for the blue and green sets

From: Results from an exploratory study to test the performance of EQ-5D-3L valuation subsets based on orthogonal designs, and an investigation into some modeling and transformation alternatives for the utility function

GREEN SET Model 1 Model 2 Model 3 Model 4 Model 5 Model 6  
   VAS rescaled  
VAS raw Individual level Aggregate level Model 4 versus Model 6
No constant With constant No constant With constant No constant With constant
Adjusted R-Sq 0.5660 0.5988 0.5281 0.5489 0.9 0.6 −0.0499
% MAE: Green Model w/ Green Observed 5.50% 2.40% 5.08% 2.38% 5.01% 2.35% 0.03%
% Residuals >5% (i.e. 5.0 for Raw, and 0.05 for Rescaled) 55% 5% 50% 10% 50% 5% 5%
% MAE: Green Model w/ Blue Observed 6.50% 3.90% 6.30% 4.08% 6.13% 4.59% −0.51%
% MAE: Green Model w/ Green Holdouts 5.15% 4.65% 5.28% 4.84% 6.03% 5.61% −0.77%
Correlation within sample (Green Model w/ Green Observed) 0.9778 0.9945 0.9804 0.9943 0.98 0.9940 0
Correlation out of sample (Green model w/ Blue Observed) 0.9725 0.9871 0.9731 0.9854 0.97 0.97 0.01
  Model 1 Model 2 Model 3 Model 4 Model 5 Model 6  
BLUE SET    VAS rescaled  
  VAS raw Individual level Aggregate level Model 4 versus Model 6
  No Constant With Constant No Constant With Constant No Constant With Constant
Adjusted R-Sq 0.5280 0.57 0.54 0.57 0.9 0.57 0
% MAE: Blue Model w/ Blue Observed 5.40% 2.25% 5.00% 2.25% 4.90% 2.21% 0.04%
% Residuals >5% (i.e. 5.0 for Raw, and 0.05 for Rescaled) 40% 10% 40% 10% 40% 10% 0%
% MAE: Blue Model w/ Green Observed 6.37% 3.85% 5.99% 3.81% 6.25% 3.85% −0.04%
% MAE: Blue Model w/ Blue Holdouts 4.53% 2.46% 4.22% 2.63% 5.95% 2.62% −0.01%
Correlation within sample (Blue Model w/ Blue Observed) 0.9725 0.9944 0.9745 0.9936 0.9750 0.99 0
Correlation out of sample (Blue model w/ Green Observed) 0.9594 0.9818 0.9631 0.9821 0.9630 0.9820 0