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Table 7 Mean, standard deviation, minimum and maximum of utility values, RMSE and MAE for the predicted utilities (p-values result from a t-test)

From: Evaluation of the performance of algorithms mapping EORTC QLQ-C30 onto the EQ-5D index in a metastatic colorectal cancer cost-effectiveness model

 

Observed utility NL

Model 1

RE functional scale scoresa

Model 2

RE: continuous

Model 3

RE: dummy variables

Model 4

Ordered logit

Model 5

Beta regression

Model 6

Separate equations

Mean

0.834

0.832

0.832

0.833

0.830

0.838

0.834

St.Dev

0.171

0.134

0.134

0.133

0.145

0.156

0.138

Min

−0.134

0.069

−0.055

0.057

−0.206

0.034

0.178

Max

1

0.982

0.969

0.966

0.975

0.959

0.990

RMSE

–

0.098

0.098

0.103

0.098

0.106

0.100

MAE

–

0.072

0.075

0.077

0.072

0.081

0.070

Spearman correlation

–

0.781

0.780

0.779

0.786

0.774

0.787

p-value

–

0.564

0.501

0.615

0.125

0.108

0.943

  1. aPreferred model
  2. p-values result from a t-test