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Background The debate on the benefits and limitations of off-pump (OPCAB) coronary artery bypass grafting (CABG) on long-term outcomes is not yet settled. This study aimed to compare the impact of OPCAB vs on-pump CABG on long-term outcomes and to evaluate possible public health implications linked to their use. Methods The PRIORITY project was planned to evaluate the long-term outcomes of two prospective multicenter studies on CABG conducted between 2002-2004 and 2007-2008. Data on isolated CABG were linked to administrative data in order to retrieve patients' late outcome. Time-to-event distributions were analyzed accordingly to primary event-type (death, major adverse cardiac events (MACEs)) using the Kaplan-Meier and the Cox proportional hazards methods. Results The study population consisted of 11 021 patients who underwent isolated CABG (27.2% OPCAB). The median follow-up time was 8.0 years (interquartile range 7.6-10.0 years). OPCAB had comparable late all-cause mortality to on-pump CABG (HR 0.94, 95%CI 0.85-1.03, p = 0.19), but it was associated to an increased risk of MACE (adjusted HR 1.14, 95%CI 1.06-1.23, p = 0.001). In particular, OPCAB had an increased risk of repeated revascularization with percutaneous cardiac intervention (PCI) (adjusted HR 1.33, 95%CI 1.16-1.53, p Conclusions OPCAB does not affect long-term mortality, but it significantly increases the risk of MACEs. In particular, OPCAB had an increased risk of repeated revascularization with PCI. These findings may have important implications towards health resources allocation. Key messages Off-pump coronary artery bypass grafting strategy is associated with an increased long-term risk of MACE and repeated PCI. Off-pump strategy is mainly based on operator preferences and can have important implications in terms of healthcare costs.

Background Although the improvement of therapeutic strategies is leading to a dramatic decline of in-hospital acute coronary syndrome (ACS) death rates, differences in care and prognosis of ACS patients exist when age, gender and admission department are considered. Methods The national administrative hospital discharge record (HDR) system was used. Only data recorded from January 1, 2017 to Dicember 31, 2018 were analyzed. This approach allowed to identify 205775 patients reporting ACS as primary or secondary diagnosis: 122812 with non-ST-elevation ACS (NSTE-ACS) and 82963 with ST-elevation ACS (STEMI). The ACS cohort was stratified by age ( Results Among the 205775 patients hospitalized for ACS, 6% of STEMI and 8.3% of NSTE-ACS patients have been treated only in a general medicine ward and have never passed through a specific cardiology ward. For STEMI patients, the proportion becomes 4% when males are considered, increases up to 10% for females and up to 13% for elderly patients (≥75 years). During the index hospitalization, about 25% of female and more than 30% of elderly patients with STEMI do not undergo a coronary procedure or other extensive investigations; the same happens only in about 10% of male and 6% of younger patients. The proportion of improperly managed patients reaches 35% for women aged ≥75 years. Conclusions In-hospital management of women and elderly patients with ST-elevation ACS does not completely comply with the recommended guidelines and exposes them to unfavourable prognosis. Key messages Women and elderly STEMI patients are markedly less intensively investigated and treated in cardiologic departments. This medical policy could lead to unfavourable prognosis.

Background Identifying potential tools that could help improving the standard of care and lead to a better allocation of economic resources represents a main objective of research in public health. Using data from the PRIORITY cohort, this study aims to describe inpatients costs after a discharge for isolated coronary artery bypass surgery (CABG). Methods The PRIORITY project was designed to evaluate the long-term outcomes of 2 large multicenter cohort studies on CABG conducted between 2002-04 and 2007-08. For each patient discharged alive after a CABG intervention, costs of hospitalizations were estimated as the sum of costs of all the admissions occurred during 3 years of follow-up. NHS reimbursement rates were used as standard costs (in Euros). Inpatients costs were analysed according to their baseline risk factors. Results Among the 7363 patients included in this analysis, the median 3-year hospitalization costs were 4341€ (IQR: 1865-11699). Median costs were around 4.000€ for subjects alive at the end of follow up but higher for patients dying within 1 (about 8.600€) and 2-3 years of follow up (about 20.000€). The presence of comorbidities (such as diabetes and cancer) lead to higher median hospitalization costs while the on-pump approach was associated to lower median cost. Sixteen per cent of patients were at zero cost having no re-hospitalizations during the 3 years of follow-up (97% alive). Subjects at zero cost received more frequently on-pump approach, had a lower frequency of cancer, arteriopathy and ictus, but a higher frequency of angina and infarction. Conclusions Inpatient costs after isolated CABG are affected by preoperative comorbidities and by operative variables that could be removed or managed. Identifying independent risk factors for re-hospitalization will lead to the definition of a preoperative clinical and decision-making path that will bring both a clinical advantage for the patient and an optimization of costs for the NHS. Key messages Inpatient costs after isolated CABG are affected by preoperative comorbidities and operative characteristics like the on-pump approach. Appropriate management of operative approaches mainly based on operator preferences can have important implications in terms of healthcare costs.

Background Uncertainties on long-term outcomes after acute myocardial infarction (AMI) still exist, despite the ongoing progresses in the management of patients with AMI. This study aims to appraise early and 1-year outcome of patients hospitalized due to AMI and to describe the role of heart failure (HF) as complication affecting prognoses. Methods Retrospective nationwide cohort study based on administrative data on patients with AMI admitted in all Italian hospitals from 2007 to 2017. Index admission mortality rate (I-MR), 30-day and 1-year post-discharge mortality rate (PD-MR), and 30-day and 1-year total mortality rate (T-MR) were analysed; mortality average annual changes (AC) and their 95% CI were calculated; the Cox model, adjusting for age, sex, comorbidities and length of stay, was used to analyse 1-year PD-MR Results 1,148,820 patients were considered. From 2007 to 2017, both I-MR and T-MR up to 1 year decreased significantly (from 10.9 to 8.4%; AC: -0.28%; CI: -0.31 to -0.25 and from 20.2% to 17.1%: AC: -0.33%; CI: -0.39 to -0.28, respectively). From 2010, also the rate of PD-MR decreased significantly from 11.7% to 10.4%, with such favourable trend confirmed at multivariable analyses. The HF diagnosis at the index admission is always associated with a significant increase in the risk of death (1-year T-MR average: 43% and 12% in patients with or without HF, respectively; both patients with and without HF show a constant improvement in I-MR, T-MR and PD-MR over time. Conclusions In the last decade, the remarkable improvements in the in-hospital treatment of patients with AMI and in the overall prognosis up to 1 year are confirmed by a constant decrease in both early and long-term mortality. Since complication from HF remains a dangerous condition that significantly worsens the prognosis of the AMI patient, appropriate management strategies must be identified and implemented to guarantee best results from both clinic and public health perspective. Key messages Remarkable improvements achieved in overall prognosis after AMI over the past 10 years. HF confirms to be a condition able to worsen AMI patients’ prognosis.

Background The advantages to use the bilateral internal thoracic artery grafting (BITA) technique for coronary artery bypass grafting (CABG) have been recently questioned, but data on long-term follow-up is limited. Using data from the PRIORITY project, this study aims to assess the outcome with the use of BITA grafting and its implications for public health. Methods The PRIORITY project was planned to evaluate the long-term outcomes of two prospective multicenter studies on CABG conducted between 2002-2004 and 2007-2008. Data on isolated CABG were linked to administrative data in order to retrieve patients' late outcome. Time-to-event distributions were analyzed accordingly to primary event-type (death, major adverse cardiac events (MACEs)) using the Kaplan-Meier and the Cox proportional hazards methods. Results The study population consisted of 11021 patients who underwent isolated CABG. BITA grafting was employed in 24.6% of patients. The median follow-up time was 8.0 years (interquartile range 7.6-10.0 years). After adjustment for potential confounding factors, BITA grafting was significantly associated with better survival (HR 0.85, 95%CI 0.76-0.95, p = 0.003). Moreover, using BITA grafting reduced the incidence of MACE (HR 0.87, 95%CI 0.80-0.94, p = 0.001), showing to be a protective factor for recurrent acute myocardial infarction (HR 0.84, 95%CI 0.71-0.99, p = 0.05) and for rehospitalization for percutaneous cardiac intervention (HR 0.82, 95%CI 0.70-0.96, p = 0.013). Conclusions BITA grafting during isolated CABG is associated with survival advantage at 10-year with a significantly reduced incidence of MACE. Being the choice to perform isolated CABG with or without BITA based mainly on operator personal preferences, these findings may have important implications from a public health perspective. Key messages The choice to perform CABG with or without BITA grafting is associated to different outcomes. The choice to perform CABG with or without BITA grafting is mainly based on operator preferences and may have important implications in terms of healthcare expenditures.

Background: Possible effect modifiers are often considered as confounders when applying pre-defined risk-adjustment models. The aim was to provide evidence of effect modification by gender in comparative evaluations of hospitals on 30-day in-hospital mortality after acute myocardial infarction (AMI). Methods: Ninety-two Italian hospitals discharging more than 300 patients with a diagnosis of AMI during 2004 were considered. Patients discharged or transferred within 48 h of hospital admission were excluded. Comorbidities recorded in previous and current admissions were used to define patients’ health status and to build the adjustment model, in which an interaction term (gender by hospital) was introduced to test the presence of effect modification. The end point was the 30-day in-hospital mortality after AMI. Results: The study population consists of 38 544 incident events of AMI from 92 Italian hospitals. Eleven hospitals showed a significant effect modification by gender. In one of them, the overall mortality rate was comparable with that of the reference category, but a significant excess risk for women was found [odds ratios (ORs) = 2.3; P < 0.01]. In 10 hospitals, the overall adjusted ORs presented a significant excess mortality compared with the benchmark: three had a significant excess mortality only among females (ranging from 230 to 370%), four only among males (ranging from 110 to 200%), and three among both genders. Conclusions: An effect modification by gender was found. The results suggest that in comparative hospital performances evaluation, stratification by gender is desirable to investigate possible differences in attitudes and practices of health services in the treatment of men and women.