Table 4

Effectiveness of quality improvement collaboratives (ordered by study quality)

Main publication author (year)Study aimPrimary indicator (italics represent process indicators)Results (intervention vs comparator)Effective/
Peden (2019)22Reduce postoperative mortality90-day mortalityMortality 16% vs 16% (p=ns)Ineffective
Bamber (2019)25Reduce time to emergency cholecystectomy8-day surgery rate8-day rate 14.6% vs 9.4% (no p value)Effective
McNaney (2011)23Reduce postoperative length of stayLength of stayNo numbers reported (no p value)Ineffective
Aggarwal (2019)21Reduce postoperative mortalityCrude in-hospital mortalityMortality 8.3% vs 9.8% (no p value)Effective
Tadd (2019)28Improve care via guidance implementation30-day mortalityMortality 5.8% vs 9.2% (p<0.001)Effective
McLeod (2003)26Increase proportion of patients with a ‘to come in date’Proportion of patients with booked admission dateDates for 66.2% vs 51.1% (p<0.001)Effective
Potgieter (2012)19Reduce postoperative mortalityIn-hospital mortalityMortality 2.4% vs 7.5% (no p value)Effective
Kuper (2011)27Implement intraoperative oesophageal Doppler monitoringUse of Doppler monitorsDoppler used 65% vs 11% (no p value)Effective
Huddart (2015)20Reduce postoperative mortalityRisk-adjusted 30-day mortalityMortality 9.6% vs 15.6% (p=0.003)Effective
Feinberg (2018)24Eliminate delay in operative managementCompliance with Royal College of Surgeons guidelines on time to surgeryBreach 3.5% vs 13.7% (p=0.00)Effective