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Table 3 Variables for per- and post-matched samples for the intervention and comparison group

From: Application of propensity scores to estimate the association between government subsidy and injection use in primary health care institutions in China

  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
  1. 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.