Table 7 

Multivariate analysis between impact on quality of life from WTP/income method and demographicclinicalsocioeconomic factors. 

Variable 
Coefficient 
tStatistic 
pvalue 


C 
0.158 
3.686 
0.000* 
AGE 
0.002 
2.301 
0.024* 
OCC 
0.044 
2.902 
0.005* 


Dependent Variable: WTP/income. R square: 0.125 Adjusted R square: 0.102 Fstatistic: 5.380, pvalue 0.007 * Significant values (pvalue < 0.05)
WTP/income: Impact on quality of life obtaining from WTP method (monthly WTP/monthly income) AGE: Age of patient (years) OCC: Dummy variable which 1 = economic inactive occupation (housewife, pensioner, unemployed) and 0 = otherwise. 

Leeyaphan et al. BMC Dermatology 2011 11:16 doi:10.1186/147159451116 