Impact of service redesign on the socioeconomic inequity in revascularisation rates for patients with acute myocardial infarction: a natural experiment and electronic record-linked cohort study

Abstract

AimTo investigate the impact of service redesign in the provision of revascularisation procedures on the historical socioeconomic inequity in revascularisation rates for patients with acute myocardial infarction (AMI).DesignNatural experiment and retrospective cohort study using linked data sets in the Secure Anonymised Information Linkage databank.Non-randomised interventionAn increase in the capacity of revascularisation procedures and service redesign in the provision of revascularisation in late 2011 to early 2012.SettingSouth Wales cardiac network, Census 2011 population 1 359 051 aged 35 years and over.Participants9128 participants admitted to an NHS hospital with a first AMI between 1 January 2010 and 30 June 2013, with 6-months follow-up.Main outcome measureHazard ratios (HRs) for the time to revascularisation for deprivation quintiles, age, gender, comorbidities, rural–urban classification and revascularisation facilities of admitting hospital.ResultsIn the preintervention period, there was a statistically significant decreased adjusted risk of revascularisation for participants in the most deprived quintile compared to the least deprived quintile (HR 0.80; 95% CI 0.69 to 0.92, p=0.002). In the postintervention period, the increase in revascularisation rates was statistically significant in all quintiles, and there was no longer any statistically significant difference in the adjusted revascularisation risk between the most and the least deprived quintile (HR 1.04; 95% CI 0.89 to 1.20, p<0.649). However, inequity persisted for those aged 75 years and over (HR 0.40; 95% CI 0.35 to 0.46, p<0.001) and women (HR 0.77; 95% CI 0.70 to 0.86, p<0.001).ConclusionsSocioeconomic inequity of access to revascularisation was no longer apparent following redesign of revascularisation services in the south Wales cardiac network, although inequity persisted for women and those aged 75+ years. Increasing the capacity of revascularisation did not differentially benefit participants from the least deprived areas.

Impact of the Regional Network for AMI in the Management of STEMI on Care Processes, Outcomes and Health Inequities in the Veneto Region, Italy

“…In another larger American study it emerged that a state-wide STEMI regionalization program was associated with improvements in treatment times for female, black, and elderly patients comparable with those for middle-aged, white, male patients [ 17 ]. Finally, in a recent European population-based study, socioeconomic inequity of access to revascularization was no longer apparent following the redesign of revascularization services in the South Wales Cardiac Network [ 18 ]. Such studies have been rather scarce in the European context, however.…”