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Table 4 PSM matching effect and results of the disease systems

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

Sample Overall balance Matching results Bootstrap results
Pseudo R2 LR chi2 P Mean bias Median bias Difference S.E. T-stat Difference Z-value p 95% CI (lower, upper)
Expenditure of hospitalization (EOH)
 Circulatory diseases 0.014 10.54 0.649 5.30 3.9 − 0.013 0.11 − 0.12 − 0.013 − 0.13 0.893 − 0.20 to 0.18
 Digestive diseases 0.007 8.31 0.873 3.00 2.0 − 0.119 0.10 − 1.19 − 0.119 − 1.28 0.199 − 0.30 to 0.06
 Respiratory diseases 0.015 21.35 0.093 4.60 4.7 0.031 0.13 0.24 0.031 0.24 0.812 − 0.23 to 0.29
 Surgical diseases 0.003 3.46 0.998 2.70 2.0 − 0.169 0.10 − 1.77 − 0.169 − 2.02 0.043 − 0.33 to 0.01
 Others 0.008 6.53 0.951 4.60 4.5 0.174 0.12 1.46 0.174 1.34 0.180 − 0.08 to 0.43
Length of stay (LOS)
 Circulatory diseases 0.014 10.54 0.649 5.30 3.9 − 0.198 0.78 − 0.25 − 0.198 − 0.23 0.820 − 1.90 to 1.51
 Digestive diseases 0.007 8.31 0.873 3.00 2.0 − 0.607 0.68 − 0.89 − 0.607 − 0.87 0.384 − 1.97 to 0.76
 Respiratory diseases 0.015 21.35 0.093 4.600 4.7 − 0.094 0.77 − 0.12 − 0.094 − 0.10 0.919 − 1.91 to 1.72
 Surgical diseases 0.003 3.46 0.998 2.70 2.0 − 1.427 0.72 − 1.99 1.427 − 1.86 0.063 − 2.93 to 0.07
 Others 0.039 30.24 0.007 7.70 5.5 − 0.592 1.07 − 0.55 − 0.377 − 0.29 0.773 − 2.94 to 2.18
Number of clinical inspection (NCI)
 Circulatory diseases 0.014 10.54 0.649 5.30 3.9 − 0.603 0.67 − 0.90 − 0.603 − 0.89 0.375 − 1.94 to 0.73
 Digestive diseases 0.007 8.31 0.873 3.00 2.0 0.201 0.52 0.39 0.201 0.45 0.652 − 0.67 to 1.08
 Respiratory diseases 0.015 21.35 0.093 4.600 4.7 − 0.089 0.63 − 0.14 − 0.089 − 0.17 0.868 − 1.14 to 0.89
 Surgical diseases 0.003 3.46 0.998 2.70 2.0 0.129 0.45 0.29 0.129 0.33 0.741 − 0.64 to 0.90
 Others 0.039 30.24 0.007 7.70 5.5 0.663 0.59 1.13 0.688 1.04 0.300 − 0.61 to 1.99