Effectiveness of quality improvement collaboratives (ordered by study quality)
| Main publication author (year) | Study aim | Primary indicator (italics represent process indicators) | Results (intervention vs comparator) | Effective/ ineffective |
| Peden (2019)22 | Reduce postoperative mortality | 90-day mortality | Mortality 16% vs 16% (p=ns) | Ineffective |
| Bamber (2019)25 | Reduce time to emergency cholecystectomy | 8-day surgery rate | 8-day rate 14.6% vs 9.4% (no p value) | Effective |
| McNaney (2011)23 | Reduce postoperative length of stay | Length of stay | No numbers reported (no p value) | Ineffective |
| Aggarwal (2019)21 | Reduce postoperative mortality | Crude in-hospital mortality | Mortality 8.3% vs 9.8% (no p value) | Effective |
| Tadd (2019)28 | Improve care via guidance implementation | 30-day mortality | Mortality 5.8% vs 9.2% (p<0.001) | Effective |
| McLeod (2003)26 | Increase proportion of patients with a ‘to come in date’ | Proportion of patients with booked admission date | Dates for 66.2% vs 51.1% (p<0.001) | Effective |
| Potgieter (2012)19 | Reduce postoperative mortality | In-hospital mortality | Mortality 2.4% vs 7.5% (no p value) | Effective |
| Kuper (2011)27 | Implement intraoperative oesophageal Doppler monitoring | Use of Doppler monitors | Doppler used 65% vs 11% (no p value) | Effective |
| Huddart (2015)20 | Reduce postoperative mortality | Risk-adjusted 30-day mortality | Mortality 9.6% vs 15.6% (p=0.003) | Effective |
| Feinberg (2018)24 | Eliminate delay in operative management | Compliance with Royal College of Surgeons guidelines on time to surgery | Breach 3.5% vs 13.7% (p=0.00) | Effective |