Table 3.

Variables description

Variable	Maximum	Minimum	Mean	Std
Noapp	171	0	17	25
size	3	1	1.78	0.63
income	18,526	2267	8447	3486
costgap	3614	447	1177	398
p4p	1	0	0.69	0.46
Payment	3	1	1.8	0.55
IDNs	4	1	1.63	0.93

Note: Noapp, the number of appendicitis provided by the township hospitals annually; Size can represent its inpatient and surgical services’ capacity: street township hospitals = 1, ordinary THs = 2, central THs =3; Costgap, the difference between the average out-of-pocket cost of appendicitis in the THs and CLHs; The remuneration of medical staff are linked up with the healthcare services provision in a certain degree. Payment methods were composited with single-disease with abundant quota, single-disease with limited quota, fee for service. IDNs are vigorously promoted by the China government, the sampling THs were clustered as four types based its property right belongings and management form: no integration = 1, tight integration = 2, loose integration = 3, merged integration = 4