Table 4 Estimated coefficients of the Two-Parts Model for WTP per dose of dengue vaccine

Age

− 0.0152

0.0141

0.279

− 2.1193

0.9059

0.019*

Gender

 Male

–

–

–

–

–

–

 Female

− 0.1589

0.2308

0.491

− 38.1953

12.0638

0.002*

Ethnicity

 Malay

–

–

–

–

–

–

 Chinese

0.3222

0.2767

0.244

16.7443

13.1574

0.203

 Indian

− 0.3955

0.312

0.205

11.0081

20.0119

0.582

 Others

− 0.1273

0.5203

0.807

18.5897

38.4334

0.629

Have children

 No

–

–

–

–

–

–

 Yes

0.6508

0.3418

0.057

13.8021

17.0662

0.419

Education level (ISCED 2011 level)

 0

–

–

–

–

–

–

 1

2.0927

0.8216

0.011*

83.3829

70.1123

0.234

 2

2.8677

0.7849

<0.001*

74.2732

66.4999

0.264

 3

3.2913

0. 8174

<0.001*

94.6604

67.7156

0.162

 > 4

3.0722

0.7662

<0.001*

113.2698

66.8408

0.090

Occupation

 Unemployed

–

–

–

–

–

–

 Pensioner

2.3724

1.1288

0.036*

69.0878

26.0633

0.008*

 Student

0.6855

0.4639

0.139

− 54.9633

19.8143

0.006*

 Government servant

0.3201

0.3961

0.419

− 19.2953

17.4188

0.268

 Private/Self-employed

1.2063

0.3959

0.002*

21.4933

16.0178

0.180

Monthly household income

 ≤ RM1000

–

–

–

–

–

–

 RM1001–RM2000

− 1.3307

0.399

0.001*

− 51.5993

18.1789

0.005*

 RM2001–RM3000

− 0.4423

0.4109

0.282

− 4.9886

15.2938

0.744

 RM3001–RM4000

− 1.0823

0.4008

0.007*

4.8979

16.0833

0.761

 RM4001–RM5000

− 1.0505

0.4496

0.019*

11.7889

21.4033

0.582

 ≥ RM5001

0.0101

0.4635

0.983

35.1865

22.8796

0.124

Experience with dengue disease

 No

–

–

–

–

–

–

 Yes

0.1046

0.224

0.64

5.1199

11.5706

0.658

Dengue disease knowledge score

− 0.0167

0.8782

0.849

3.1789

4.5639

0.486

Household dengue prevention practice score

0.0634

0.0358

0.076

4.9612

2.0577

0.016*

Vaccination attitude score

0.0364

0.0822

0.658

3.749

3.4303

0.274

Dengue vaccine acceptance

 No

–

–

–

–

–

–

 Yes

3.2343

1.002

0.001*

− 38.0342

64.9667

0.558

Vaccine

 A

–

–

–

–

–

–

 B

0.6693

0.2309

0.004*

51.655

9.9542

< 0.001*

 B for children

1.3994

0.3663

< 0.001*

77.302

15.4756

< 0.001*

Constant

− 5.8708

1.5646

< 0.001*

39.2072

87.9101

0.656