From: Value of willingness to pay for a QALY gained in Iran; a modified chained-approach
 | Dependent variable: Ln(willingness to pay) | |||||
---|---|---|---|---|---|---|
Variables | Aggregate model | Trimmed modela | ||||
Green health state | Yellow health state | Total | Green health state | Yellow health state | Total | |
Ln(life expectancy) | -0.103 (0.18) | -0.296* (0.18) | -0.121 (0.13) | 0.017 (0.14) | -0.251 (0.14) | -0.122 (0.09) |
Ln(BMI) | 0.519* (0.27) | 0.466* (0.26) | 0.115 (0.19) | 0.194 (0.20) | -0.425** (0.16) | -0.088 (0.11) |
Ln(education years) | 0.543*** (0.12) | 0.194* (0.11) | 0.373*** (0.08) | 0.247*** (0.07) | 0.158** (0.07) | 0.229*** (0.06) |
Ln(per capita monthly household expenditure) | 0.249*** (0.06) | 0.342*** (0.06) | 0.288*** (0.04) | 0.102** (0.04) | 0.116*** (0.04) | 0.112*** (0.03) |
Female = 1 | -0.082 (0.10) | 0.085 (0.08) | 0.077 (0.06) | -0.020 (0.06) | 0.008 (0.06) | 0.014 (0.05) |
Employed = 1 | 0.299*** (0.09) | 0.048 (0.09) | 0.151** (0.06) | -0.126* (0.05) | -0.026 (0.06) | -0.080 (0.05) |
Married = 1 | -0.103 (0.09) | -0.221** (0.09) | -0.184*** (0.06) | -0.003 (0.05) | -0.045** (0.05) | -0.020 (0.04) |
Urban = 1 | 0.162 (0.14) | 0.185 (0.14) | 0.169* (0.10) | 0.109 (0.08) | 0.249 (0.09) | 0.178** (0.07) |
Having basic insurance = 1 | 0.080 (0.13) | 0.149 (0.13) | 0.136 (0.09) | 0.073 (0.07) | 0.197 (0.09) | 0.124* (0.07) |
Head of household = 1 | -0.374*** (0.12) | -0.114 (0.12) | -0.272*** (0.09) | -0.166* (0.09) | -0.085 (0.09) | 0.131* (0.07) |
Health utility | -0.265** (0.11) | -0.118** (0.12) | -0.213*** (0.08) | -0.234** (0.10) | -0.194** (0.11) | -0.221*** (0.09) |
Constant | 5.368 (1.24) | 9.430 (1.19) | 6.641 (0.84) | 6.628 (0.98) | 9.130 (0.96) | 7.778 (0.56) |
Observations | 1525 | 1329 | 2854 | 1314 | 1182 | 2496 |
R-squared | 0.17 | 0.16 | 0.15 | 0.21 | 0.20 | 0.17 |
Prob > F | < 0.001 | < 0.001 | < 0.001 | <0.001 | 0.003 | <0.001 |