Table 5 Log linear regression modeling for determinants of willingness to pay level

Area

 Hoang Tay

–

–

 Nhat Tan

0.005*

0.11–0.54*

Gender of the head of household

 Male

–

–

 Female

0.51

−0.26 to 0.13

Age of the head of household (years)

 <24

–

–

 25–34

0.05

0.00–0.91

 35–44

0.41

−0.28 to 0.68

 45–54

0.37

−0.26 to 0.69

 55–64

0.79

−0.45 to 0.60

 65+

0.12

−1.15 to 0.13

Education of the head of household

 Primary

–

–

 Secondary

0.46

−0.27 to 0.12

 Tertiary and higher

0.92

−0.42 to 0.38

Occupation of the head of household

 Farmer

–

–

 Non-farmer

0.11

−0.04 to 0.4

Household size

 <5 members

–

–

 ≥5 members

0.10

−0.43 to 0.04

Having children aged <6 years

 Yes

0.38

−0.13 to 0.35

 No

–

–

Having people aged ≥60 years

 Yes

0.76

−0.29 to 0.21

 No

–

–

Main sources of water

 Tape water

–

–

 Rain, well water

0.74

−0.32 to 0.45

Current toilet

 Double vault toilet

–

–

 Single vault toilet

0.05

−0.49 to 0

 No toilet

0.59

−0.57 to 0.33

Dissatisfaction with the current toilet

 Yes

0.84

−0.26 to 0.32

 No

–

–

Economic status of household

 Poor

<0.001*

−1.22 to −0.43*

 Non-poor

–

–

Having a family member with a chronic disease

 Yes

0.34

−0.3 to 0.11

 No

–

–

Knowledge of health impacts of poor sanitation

 Poor

–

–

 Better

0.23

−0.44 to 0.11

 Constant

<0.001*

7.75–10.13*