Article Figures & Tables
Figures
- Figure 1:
Raw medicolegal case count (A) and standardized medicolegal case volume (B) by region, Canadian Medical Protective Association in-hospital cases; raw patient safety indicator event counts (C) and standardized patient safety indicator event volume (D) by region, Discharge Abstract Database.
Tables
- Table 1:
Selected patient safety indicators reported in the Discharge Abstract Database, 2005/06 to 2014/15
Patient safety indicator15 No. of events*
n = 339 741Model Surgical
n = 168 886Obstetrical
n = 97 98203 Pressure ulcer event 38 136 05 Retained surgical item or unretrieved device fragment events 1979 × 06 Iatrogenic pneumothorax event 21 343 07 Central venous catheter-related blood stream infection event 13 394 × 08 Postoperative hip fracture event 16 848 10 Postoperative physiologic and metabolic derangement event 12 009 × 11 Postoperative respiratory failure event 5453 × 12 Perioperative pulmonary embolism or deep vein thrombosis event 32 066 × 13 Postoperative sepsis event 7450 × 14 Postoperative wound dehiscence event 5781 × 15 Accidental puncture or laceration event 87 132 × 16 Transfusion reaction event 168 × 17 Birth trauma event – injury to neonate 15 827 × 18, 19 Obstetric trauma event – vaginal delivery with or without instrument 82 155 × ↵* Within the same model, if a case from the Discharge Abstract Database involved more than 1 patient safety indicator event, it was counted only once. Some records involved multiple indicator events for different models, and these events were counted separately for different models.
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.
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