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Table 4 Modelling results of the best performing models for cTTO-only, DCE-only and hybrid

From: The EQ-5D-5L valuation study for Trinidad and Tobago

Heteroskedastic Tobit (cTTO only)

Mixed logit (DCE only)

Hybrid heteroskedastic Tobit (value set)

coefficients

Beta

SE

Mean Beta

SE

Betaa

Beta

SE

mo2

0.014

0.007

0.745**

0.098

0.048

0.027

0.005

mo3

0.058

0.013

1.509**

0.123

0.097

0.085

0.006

mo4

0.162

0.014

3.165**

0.179

0.203

0.187

0.006

mo5

0.357

0.014

5.701**

0.298

0.365

0.368

0.007

sc2

0.029

0.007

0.473**

0.11

0.030

0.024

0.004

sc3

0.074

0.011

1.236**

0.111

0.079

0.072

0.006

sc4

0.159

0.013

2.427**

0.15

0.156

0.150

0.006

sc5

0.221

0.012

3.773**

0.197

0.242

0.232

0.006

ua2

0.016

0.007

0.173

0.108

0.011

0.011

0.004

ua3

0.087

0.011

0.961**

0.117

0.062

0.065

0.006

ua4

0.145

0.011

2.152**

0.14

0.138

0.146

0.006

ua5

0.216

0.013

3.186**

0.176

0.204

0.219

0.006

pd2

0.026

0.006

1.259**

0.111

0.081

0.044

0.004

pd3

0.102

0.013

2.373**

0.139

0.152

0.128

0.006

pd4

0.316

0.013

5.031**

0.238

0.322

0.311

0.007

pd5

0.541

0.016

7.730**

0.34

0.495

0.480

0.008

ad2

0.024

0.006

0.263*

0.119

0.017

0.020

0.004

ad3

0.057

0.012

1.237**

0.137

0.079

0.074

0.006

ad4

0.168

0.012

2.436**

0.192

0.156

0.161

0.006

ad5

0.272

0.011

3.988**

0.246

0.256

0.264

0.006

MAE (total)

0.295

 

N/A

 

0.303

0.297

 

MAE(86 states)

0.043

 

N/A

 

0.053

0.044

 

MAE out of sample (state)

0.056

 

N/A

 

N/A

0.049

 

MAEout of sample (block)

0.042

 

N/A

 

N/A

0.050

 

v(55555)

-0.607

 

24.38

 

-0.563

-0.563

 
  1. Rows mo2-ad5 indicate the decrements associated to specific level-dimension combinations, with for example ua4 representing level 4 problems with usual activities
  2. AIC Akaike Information Criterion, BIC Bayesian Information Criterion, MAE Mean Absolute Error
  3. aThe estimated mean betas for the mixed logit model were rescaled using the scale length for the hybrid heteroskedastic model. Rescaling factor: 0.0641
  4. *indicates p<0.05
  5. **indicates p<0.01
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