Table 4.

Results of Tobit regression model on EuroQol five-dimension five-level index scores of respondents

Variables	Regression coefficient	95% CI	P values
Marital status (ref=other)
Married	0.128	−0.010 to 0.267	0.070
Occupation (ref=retired)
Public sector employee	0.069	−0.073 to 0.210	0.340
Private sector employee	0.073	−0.069 to 0.215	0.313
Self-employed or unemployed	0.011	−0.139 to 0.163	0.879
Farmer	0.104	−0.080 to 0.288	0.265
Health insurance (ref=new rural cooperative medical scheme)
Urban employees basic medical insurance	0.126	−0.047 to 0.299	0.152
Urban residents basic medical insurance	0.157	0.001 to 0.313	0.049*
Stage of disease (ref=I)
II	−0.203	−0.342 to −0.065	0.004**
III	−0.329	−0.468 to −0.192	0.000***
IV	−0.626	−0.809 to −0.444	0.000***
Annual household income(ref≥80 000)
<20 000	−0.261	−0.422 to −0.100	0.002**
20 000–39 999	−0.220	−0.358 to −0.081	0.002**
40 000–59 999	−0.155	−0.294 to −0.016	0.029*
60 000–79 999	−0.145	−0.306 to −0.015	0.076
Therapeutic regimen (ref=other)
Surgery	−0.261	−0.423 to −0.098	0.002**
Radiotherapy/chemotherapy	0.135	−0.057 to 0.326	0.167
Surgery followed by postoperative chemotherapy	0.177	−0.166 to 0.202	0.849
Chemotherapy followed by surgery	0.053	−0.178 to 0.284	0.653
Stoma (ref=no)
Yes	−0.224	−0.337 to −0.111	0.000***

*P<0.05, **P<0.01, ***P<0.001.