Table 8. Inpatient services: description of independent variables in the linear regression models.

Variables	Description	Percentage (%)
Year
2010*	The year of 2010 = 1, the year of 2011 = 0	48.1
2011	The year of 2011 = 1, the year of 2010 = 0	52.0
County hospital
Zhenping	Zhenping = 1, Ningshan = 0	37.2
Ningshan	Ningshan = 1, Zhenping = 0	62.8
2011*Ningshan	The interaction of 2011 and Ningshan = 1, other = 0	33.3
Gender
Female*	Female = 1, male = 0	51.5
Male	Male = 1, female = 0	48.5
Age	The age of inpatient	40.1
Occupation
Peasant*	Peasant = 1, other = 0	62.3
Worker	Worker = 1, other = 0	2.8
Government officer	Government officer = 1, other = 0	4.5
Teacher	Teacher = 1, other = 0	11.9
Student	Student = 1, other = 0	2.7
Unemployed	Unemployed = 1, other = 0	4.9
Child	Child = 1, other = 0	4.8
Other occupation	Other occupation = 1, other = 0	6.1
Marital status
Married*	Married = 1, other = 0	74.0
Unmarried	Unmarried = 1, other = 0	23.5
Divorced	Divorced = 1, other = 0	0.2
Widowed	Windowed = 1, other = 0	2.3
Other marital status	Other marital status = 1, other = 0	0.0
Health insurance
UEMI*	UEMI = 1, other = 1	8.9
URMI	URMI = 1, other = 1	2.6
NCMS	NCMS = 1, other = 0	64.9
Insurance for gov officers	Insurance for gov officers = 1, other = 0	0.9
Other health insurance	Other health insurance = 1, other = 0	1.4
Out-of-pocket	Out-of-pocket = 1, other = 0	21.5
Severity of medical condition
Not-at-all severe*	Not-at-all severe = 1, other = 0	72.3
Severe	Severe = 1, other = 0	22.5
Very serious	Very serious = 1, other = 0	5.3
Outcome of hospitalization
Healed*	Healed = 1, other = 0	50.2
Improved	Improved = 1, other = 0	28.5
No change	Not healed = 1, other = 0	2.0
Death	Death = 1, other = 0	0.6
Other outcome	Other outcome = 1, other = 0	18.8
Surgery or not
No surgery*	No surgery = 1, other = 0	73.3
Surgery	Surgery = 1, other = 0	26.7