Table 3 Matching results of the PSM
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 |