Post-COVID-19 condition (PCC) has emerged as a major public health concern. We aimed to estimate the 1-year incidence of PCC in adults with confirmed SARS-CoV-2 infection in Lombardy, Italy, comparing community-managed and hospitalised patients and to assess the prognostic value of the National Institutes of Health (NIH) Researching COVID to Enhance Recovery (RECOVER) score to support estimation of long-term PCC prevalence.

Retrospective-prospective observational cohort study enrolling patients infected between 1 March 2020 and 31 December 2022. The study visit was conducted between 16 January and 23 December 2024.

Multicentre study involving seven public hospitals and general practitioners across Lombardy.

Randomly sampled adults aged 18–70 years with confirmed SARS-CoV-2 infection. Hospitalised patients (HP) were admitted for COVID-19; general practitioner patients (GPP) were managed in the community. The total sample comprised: 1162 (546 HP, 616 GPP).

This is an observational study with no active intervention.

Primary outcome: 1-year incidence of PCC retrospectively assessed at the study visit.

Secondary outcomes: symptom profiles, long-term PCC prevalence at the study visit and predictive value of the NIH RECOVER score.

Median age was 57.1 years in HP and 42.9 years in GPP; 66.1% of HP and 47.7% of GPP were male. PCC developed in 280 patients (223 HP, 57 GPP). The 1-year cumulative incidence was 39.9% in HP (95% CI 35.9% to 44.1%) and 9.1% in GPP (95% CI 7.1% to 11.7%). The NIH RECOVER score was associated with PCC at 1 year (OR 1.18, 95% CI 1.14 to 1.21). Model-based long-term PCC prevalence was 31.8% in HP and 6.3% in GPP.

PCC remained frequent and heterogeneous, particularly among previously HP. In this cohort, the NIH RECOVER score showed prognostic value for estimating longer-term PCC burden. These findings underscore the need for structured long-term follow-up across both hospital and primary care settings.

Quality collaboratives improve quality of care at the hospital and collaborative levels, but less is understood about how such efforts affect patient-level disparities. This study evaluated how a quality improvement (QI) effort (increasing multiarterial grafting during coronary artery bypass grafting (CABG)) translated into populations which historically receive lower-quality care (females and patients of low socioeconomic status).

Retrospective cohort study.

All non-federal hospitals in the state of Michigan that perform cardiac surgery and participate in a statewide collaborative database (n=33).

Patients undergoing first-time, isolated CABG receiving at least two bypass grafts from 2011 to 2022 were identified.

Association of sex and socioeconomic status with multiarterial grafting was evaluated across the study period. The distressed community index (DCI), a socioeconomic ranking (0—not distressed, 100—severely distressed), was matched to the patient’s zip code. Hierarchical regression modelling was performed to associate DCI and sex with multiarterial grafting, incorporating patient factors and hospital and surgeon effects. A sex-surgery year and DCI-surgery year interaction term was performed to assess the change in the rate of multiarterial grafting.

A total of 40 322 patients underwent CABG at 33 centres with a median age of 66 years and 24% were female. The rate of multiarterial grafting was 15%, although lower among females (10% vs 17%) and the highest (vs lowest) DCI quartile (14% vs 18%). After risk adjustment, females were less likely to receive multiarterial grafting (OR_adj 0.51 (95% CI 0.45 to 0.58), padj 0.35 per 10-point increase (95% CI 0.24 to 0.51), p0.05).

Despite a large overall increase in multiarterial grafting due to QI efforts, females and patients with low socioeconomic status had lower rates of multiarterial grafting. QI efforts should be evaluated both overall and among patients who historically receive lower quality care to improve quality and equity.