Table 3 Results of the Tobit regression analysis of the factors affecting on WTP per QALY values
Explanatory variables | Model A | Model B | Model C |
|---|---|---|---|
β Coefficient | β Coefficient | β Coefficient | |
Age, year | − 45.0 | − 39.4 | − 1.3 |
Sex (ref. male) | |||
Female | 1510.5* | 1126.4* | 477.7* |
Marital status (ref. single) | |||
Married | 335.4 | 226.5 | 572.4 |
Others | 1717.6 | 479.8 | 1307.1 |
Education status (ref. academic degree) | |||
Illiterate | 3351.5* | 2162.5* | 659.3 |
Primary and secondary school | − 260.8 | − 497.9 | − 812.9* |
Health insurance coverage (ref. No.) | |||
Yes | 842.9 | 992.6 | − 16.1 |
Birth place (ref. rural) | |||
Urban | 1398.4* | 985.1* | 488.2 |
Monthly income US$ (ref. less than 78) | |||
US$ 78 – 155 | 1060.5 | 506.4 | 338.9 |
US$ 156–310 | 1849.9* | 1064.3* | 771.7* |
More than US$ 310 | 2864.8* | 2094.6* | 1388.0* |
Having chronic disease (ref. no.) | |||
Yes | 71.9 | 418.1 | 37.1 |
Family member with chronic diseases such as cancer (ref.no.) | |||
Yes | 670.5 | 348.3 | 399.8 |
Family member died in the last year (ref.no.) | |||
Yes | 563.0 | 505.8 | 595.7 |
LR chi2 [14] | 46.9 | 38.0 | 31.0 |
Prob > chi2 | < 0.001 | < 0.001 | 0.005 |
Left-censored observations | 296 | 296 | 80 |
Uncensored observations | 551 | 551 | 767 |
Log likelihood | − 5785.2 | − 5691.8 | − 7543.4 |