Abstract Body (Do not enter title and authors here): Background
Hybrid cardiac rehabilitation (HCR) is an emerging approach to increase participation in cardiac rehabilitation, which targets improvements in functional status and broader risk factor modification including lipid management. However, long-term lipid control trends of patients engaging in HCR remain unexplored.

Methods
Using data from a quality improvement program initiated during COVID-19, we conducted a retrospective analysis of 68 adults eligible for HCR from Jan 2021 to Feb 2023 at the Johns Hopkins Health System (Baltimore, MD), utilizing the Corrie digital health platform. This multi-component platform combines expert knowledge with gamified education and virtual coaching to deliver HCR. Patients hospitalized for cardiovascular events qualifying for HCR were recruited for a pilot study of a randomized controlled trial (mTECH REHAB; NCT05238103). We modeled trends in low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), non-HDL-C, and triglycerides via mixed-effects regression.

Results
Among 68 eligible adults, 41 participated in HCR, with a mean age of 60.1 years, 78.1% male, 24.3% Black, and 14.6% Asian/Mixed. HCR participation was significantly associated with being married (61% vs 33%, p=0.044) or employed (63% vs 26%, p=0.015). On average, 2.3 lipid panels were assessed per person over a median of 12 months (max 30 months) post-discharge. During this period, LDL-C levels decreased from 84.6 mg/dL (95% CI: 75.0-94.1) to 53.0 mg/dL (95% CI: 34.3-71.8) (p for trend = 0.003). Non-HDL-C decreased from 105.9 mg/dL (95% CI: 95.7-116.1) to 74.2 mg/dL (95% CI: 54.1-94.3) (p for trend = 0.005). Levels of HDL-C and triglycerides showed no significant changes (p for trend = 0.724 and 0.607). Among 34 participants with ≥2 lipid panels, the proportion of LDL-C <70 mg/dL increased from 41.2% at hospitalization to 64.7% at the most recent check, and LDL-C <55 mg/dL increased from 14.7% to 38.2%.

Conclusion
Improvements in atherogenic lipid levels, in particular LDL-C and non-HDL-C, were observed in adults participating in HCR after a cardiovascular event. Our findings highlight the potential of HCR to support optimal lipid management in adults with cardiovascular disease.