Table 4 Relationship between the composite structural and process quality indicators or postoperative infections and ITC characteristics
| Â | Model I | Model II | Model III | Model IV |
|---|---|---|---|---|
Type of outcome variable | Composite structural and process quality indicator | Percentage postoperative infections | Percentage postoperative infections | Percentage postoperative infections |
Type of model used | RE-Linear | RE-Linear | RE-Linear | RE-Linear |
Type of data used | Annual data | Annual data | Total over 3 years | Annual data |
Log invasive treatments | 0.418*** (0.089) | −0.339*** (0.033) | −0.094*** (0.031) |  |
Highest quantile invasive treatments | Â | Â | Â | Reference |
Higher medium quantile invasive treatments | Â | Â | Â | 0.029 (0.096) |
Lower medium quantile invasive treatments | Â | Â | Â | 0.169 (0.107) |
Lowest quantile invasive treatments | Â | Â | Â | 0.293*** (0.114) |
FTE number of professionals | 0.009 (0.034) | 0.010 (0.006) | 0.011* (0.006) | 0.009 (0.009) |
No chain membership | Reference | Reference | Reference | Reference |
Chain membership | −0.393 (0.302) | 0.116* (0.063) | − 0.130 (0.090) | − 0.100 (0.074) |
For-profit | Reference | Reference | Reference | Reference |
Non-profit | 0.449 (0.363) | 0.028 (0.073) | 0.174** (0.075) | 0.187** (0.087) |
Cluster/Identifier | ID ITC | ID ITC | ID Chain | ID ITC |
Observations | 459 | 292 | 112 | 596 |
Number of groups | 211 | 145 | 72 | 236 |