Table 1. Variable and assignment description.

Variables name	Variables type	Assignment
Method of Medical payment	Dummy variable	0 = NRCMS 1 = UEBMI; 2 = URBMI;3 = Others
Pathway of Hospitalization	Dummy variable	0 = Emergency; 1 = Outpatient; 2 = Others
Type of diabetes	Dummy variable	0 = Type 1; 1 = Type 2; 2 = Others
Gender	Dummy variable	0 = Female;1 = Male
CCI	Dummy variable	0 = CCI0;1 = CCI1;2 = CCI2;3 = CCI3
Marriage status	Dummy variable	0 = Single; 1 = Married; 2 = Widowed; 3 = Divorced; 4 = Others
Occupation	Dummy variable	0 = Unemployment;1 = Farmer; 2 = Retire;3 = Self-employment; 4 = Employment; 5 = Others
Hospital level	Dummy variable	0 = Primary;1 = Secondary; 2 = Tertiary; 3 = Others
Length of stay	Continuous variable
Number of hospitalization	Continuous variable
Age	Continuous variable

NRCMS, the new rural cooperative medical insurance; UEBMI, the basic medical insurance for urban employees; URBMI, the basic medical insurance for urban residents. CCI, the Charlson Comorbidity Index.