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. 2008 Aug 11;6:16. doi: 10.1186/1478-7547-6-16

Table 7.

Interval regression. WTP determinants for voluntary health insurance (system C)

1 2
Coef. z P > |z| Coef. z P > |z|

Head .1240847 1.47 0.142 .0740998 1.02 0.309
Male .1294685 1.56 0.119 .0749992 1.05 0.294
Age -.0083357 -2.52 0.012 -.007418 -2.60 0.009
Farmer .0144706 0.17 0.867 -.112466 -1.51 0.131
Morethanprimary .20443 2.52 0.012 .1703909 2.44 0.015
Membershh .0996013 4.05 0.000 .0646929 3.05 0.002
Children .1119569 1.97 0.048 .0792814 1.62 0.104
Elderly -.0344205 -0.53 0.599 -.0092381 -0.16 0.870
Chronic .3078385 3.65 0.000 .1541756 2.12 0.034
Hcneed -.4161749 -3.47 0.001 -.3366622 -3.27 0.001
Insurexp .0769168 0.80 0.423 -.0151158 -0.18 0.855
Poor -.0419754 -0.39 0.697 -.153246 -1.65 0.100
Rich .1770999 1.84 0.066 .1259169 1.52 0.129
Prefcohi 1.321762 19.56 0.000
Prefvohi 1.648773 21.81 0.000
Constant 8.885455 38.61 0.000 8.452932 42.49 0.000
Log likelihood = -4820.0345 Log likelihood = -4522.9879
LR chi2(13) = 97.41 LR chi2(15) = 691.51
Prob > chi2 = 0.0000 Prob > chi2 = 0.0000

Total number of observations = 2022 Total number of observations = 2022

Variable name Description
Prefcohi Prefcohi = 1 if the respondent prefers compulsory health insurance (system B) over the other alternatives. Prefcohi = 0 otherwise.
Prefvohi Prefvohi = 1 if the respondent prefers voluntary health insurance (system C) over the other alternatives. Prefvohi = 0 otherwise

For an explanation of the other variables, see table 1.