Skip to main content

Table 3 Goodness-of-fit results for mapping FIQR scores onto multi attribute utilities

From: “Fibromyalgia and quality of life: mapping the revised fibromyalgia impact questionnaire to the preference-based instruments”

PANEL A
Instruments N Method Mean Utility Min Utility Max Utility MAE RMSE R-squared
 AQoL-8D 177 Observed 0.465 0.155 0.945 - -  
OLS 0.465 0.213 0.778 0.097 0.124 0.465
Gamma GLM 0.465 0.267 0.866 0.095 0.123  
 15D 192 Observed 0.688 0.391 1.000 - -  
OLS 0.688 0.487 0.931 0.069 0.087 0.507
Gamma GLM 0.688 0.510 0.967 0.069 0.087  
 EQ-5D-5 L 191 Observed 0.490 −0.480 1.000 - -  
OLS 0.490 −0.079 0.819 0.138 0.174 0.579
Gamma GLM 0.490 0.011 0.870 0.137 0.174  
 SF-6D 141 Observed 0.561 0.345 1.000 - -  
OLS 0.561 0.411 0.737 0.063 0.079 0.468
Gamma GLM 0.561 0.428 0.756 0.063 0.079  
PANEL B
Instruments N Method Mean Utility Min Utility Max Utility MAE RMSE R-squared
 AQoL-8D 177 Observed 0.465 0.155 0.945 - -  
OLS 0.465 0.228 0.787 0.097 0.123 0.480
Gamma GLM 0.465 0.275 0.876 0.096 0.122  
 15D 192 Observed 0.688 0.391 1.000 - -  
OLS 0.688 0.507 0.950 0.071 0.088 0.492
Gamma GLM 0.688 0.511 0.979 0.068 0.086  
 EQ-5D-5 L 191 Observed 0.490 −0.480 1.000 - -  
OLS 0.490 −0.081 0.836 0.138 0.175 0.573
Gamma GLM 0.490 0.010 0.890 0.137 0.176  
 SF-6D 141 Observed 0.561 0.345 1.000 - -  
OLS 0.561 0.410 0.737 0.063 0.079 0.472
Gamma GLM 0.561 0.427 0.756 0.063 0.079  
  1. Panel A: FIQR, Squared-FIQR, Age
  2. Panel B: FIQR function domain; FIQR overall impact domain; FIQR symptom domain; Squared FIQR function domain; Squared FIQR overall impact domain; Squared FIQR symptom domain; Age. Gamma GLM: Generalized linear model Gamma log-link