Modelling results
| Parameter | Model; estimate (95% CI) | ||
|---|---|---|---|
| Overall | Obstetrical | Surgical | |
| Intercept | −1.20 (−2.00 to −0.40) | −1.72 (−3.74 to 0.29) | −1.15 (−1.85 to −0.45) |
| Patient safety indicator event volume* | 1.15 (0.4 to 1.90) | 2.91 (0.53 to 5.28) | 0.92 (0.17 to 1.67) |
| Region | |||
| Alberta | −0.15 (−0.18 to −0.13) | −0.43 (−0.50 to −0.37) | 0.20 (0.18 to 0.21) |
| British Columbia | −0.11 (−0.12 to −0.09 | −0.61 (−0.92 to −0.31) | 0.12 (0.003 to 0.24) |
| Ontario | 0.09 (0.08 to 0.09) | −0.23 (−0.40 to −0.07) | 0.22 (0.21 to 0.23) |
| Rest of Canada | – | – | – |
| Year | 0.09 (0.03 to 0.15) | −0.24 (−0.31 to −0.17) | 0.22 (0.17 to 0.28) |
| Year2† | −0.01 (−0.02 to −0.004) | − | −0.03 (−0.03 to −0.02) |
| Region * year | |||
| Alberta * year | 0.03 (0.02 to 0.03) | 0.10 (0.08 to 0.11) | −0.04 (−0.04 to −0.03) |
| British Columbia * year | 0.02 (0.02 to 0.02) | 0.12 (0.06 to 0.18) | −0.02 (−0.04 to −0.001) |
| Ontario * year | −0.02 (−0.02 to −0.01) | 0.05 (0.02 to 0.09) | −0.04 (−0.05 to −0.04) |
| Rest of Canada * year | – | – | – |
Note: CI = confidence interval.
↵* These parameter estimates can alternatively be depicted as equations:
Log(medicolegal case volume) = 1.15 * patient safety indicator event volume + (intercept + control variables) for the overall model, Log(medicolegal case volume) = 2.91 * patient safety indicator event volume + (intercept + control variables) for the obstetrical model and Log(medicolegal case volume) = 0.92 * patient safety indicator event volume + (intercept + control variables) for the surgical model.
↵† The higher-order year variable (year2) was not significant and was thus removed from the final model.