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Table 3 Ordinary least square regression of the logarithm of WTA of mothers to vaccinate their children (n = 667)

From: Mothers’ willingness to accept and pay for vaccines to their children in western Iran: a contingent valuation study

Log WTPCoefficientRobust S.Ep-value95% CI
Mothers’ age (in year)−0.00100.00840.901−0.0176 to 0.0155
Mother’s education level
Below high school (ref.)    
High school and above0.0830.13370.533−0.1792 to 0.3462
Health insurance coverage
Yes (ref.)    
No0.1500.17360.388−0.1909 to 0.4909
Sex of the child
Female (ref.)    
Male−0.2823a0.10930.010−0.4970 to − 0.0676
Mother’s birthplace
Rural (ref.)    
Urban0.3106a0.15560.0460.0050 to 0.6163
Monthly household income (IRR)
< 80    
80–1600.22010.16120.173−0.0965 to 0.5366
160–3200.3602a0.17930.0450.0079 to 0.7125
> 3201.388a0.25090.0010.8955 to 1.8810
  1. Note: Dependent variable: logarithm WTA; number of observations: 667; F (8, 658): 5068; Prob>F:0.001; R-squared: 0.0713; S.E: standard error. aSignificant at 5% level