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Table 3 Matching results of the PSM

From: Effect of inappropriate admissions on hospitalization performance in county hospitals: a cross-sectional study in rural China

Sample Matching results Bootstrap results
Difference S.E. T-stat Difference Z-value p 95% CI (lower, upper)
Expenditure of hospitalization (EOH)
 Raw sample before matching − 0.21 0.042 − 5.00     
 Matched sample after kernel matching − 0.12 0.047 − 2.51 − 0.12 − 2.92 0.003 − 0.20 to − 0.04
Length of stay (LOS)
 Raw sample before matching − 1.00 0.282 − 3.55     
 Matched sample after kernel matching − 0.73 0.334 − 2.19 − 0.73 − 2.4 0.016 − 1.33 to − 0.13
Number of clinical inspection (NCI)
 Raw sample before matching − 0.59 0.219 − 2.70     
 Matched sample after kernel matching − 0.39 0.236 − 1.65 − 0.39 − 1.74 0.082 − 0.83 to 0.05
  1. All results are computed using the Stata module of psmmatch2
  2. S.E. standard error, CI confidence interval