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. 2013 May 21;13:183. doi: 10.1186/1472-6963-13-183

Table 3.

Variables for per- and post-matched samples for the intervention and comparison group

  Pre-PSM approach
Post-PSM approach
Control group Intervention group P Control group Intervention group P
Province
Hubei
14(22.22)
7(11.11)
0.06
5(14.70)
5(14.70)
0.96a
Liaoning
10(15.87)
11(17.46)
 
5(14.70)
4(11.80)
 
Shandong
8(12.70)
13(20.63)
 
7(20.60)
6(17.60)
 
Shanxi
13(20.63)
8(12.70)
 
3(8.80)
6(17.60)
 
Shaanxi
5(7.94)
16(25.40)
 
4(11.80)
4(11.80)
 
Sichuan
11(17.46)
10(15.87)
 
10(29.40)
9(26.50)
 
Category of institutions
Community Health Center (station)
18(28.60)
17(27.00)
0.84
8(23.50)
7(20.60)
0.77
Township primary health institutions
45(71.40)
46(73.00)
 
26(76.50)
27(79.40)
 
The number of staff
56.37 ± 45.07
43.98 ± 28.21
0.07
51.15 ± 38.05
41.24 ± 28.68
0.23
The number of outpatients and emergency patients
22731.16 ± 18330.00
21039.6 ± 25185.96
0.67
23201.76 ± 20435.07
19654.26 ± 17183.63
0.44
The medical income (ten thousands Yuan)
156.62 ± 156.64
100.2 ± 115.21
0.02
142.16 ± 147.86
122.01 ± 110.25
0.53
The examination income (ten thousands Yuan)
24.88 ± 37.90
21.00 ± 40.79
0.58
34.43 ± 48.36
20.32 ± 25.21
0.14
The drug income (ten thousands Yuan)
99.69 ± 74.40
92.38 ± 166.95
0.73
101.451 ± 83.69
67.14 ± 57.57
0.053
The average salary of the staff (Yuan) 2117.37 ± 690.21 2619.69 ± 580.78 0.00 2486.08 ± 639.97 2498.22 ± 533.89 0.93

Note: for continuous and categorical variables, mean ± standard deviation and Frequency (Percent) was used respectively. Differences between groups were tested by independent t test for continuous variables, chi-square test for categorical variables. All p-values were two tailed. ”a” stands for Fisher’s exact probability for expected count less than 5.