Introduction: The American Heart Association recently released an updated algorithm for evaluating cardiovascular health (CVH)—Life’s Essential 8 (LE8). However, very few studies have evaluated associations between changes in LE8 score over time and risk of cardiovascular disease (CVD). Hypothesis: We hypothesized that improving adherence to LE8 score over time was associated with lower CVD risk. Methods: We examined associations between 6-year changes (from 2006 to 2012) in LE8 score (score range, 0-100) and risk of CVD, including heart disease and stroke (from 2012 to 2020). Participants were 53328 Chinese adults from the Kailuan Study who were free from CVD in 2012. Diet, lifestyle and health conditions were repeatedly assessed every 2 years. The LE8 score was calculated based on scores for 8 components: diet quality, physical activity, smoking status, sleep health, BMI, blood lipids, blood glucose, and blood pressure. We used Cox proportional-hazard models to estimate hazard ratios (HRs) with adjustment for age, sex, alcohol intake, education, income, and family history of CVD. Results: We documented 4264 incident CVD cases (2159 heart disease and 2311 stroke) (some individuals had both heart disease and stroke) during a median of 7.7 years of follow-up. Compared with participants whose LE8 scores remained stable, those with the largest increase of LE8 score had a 30% lower CVD risk, 30% lower heart disease risk, and 28% lower stroke risk (HR and 95%CI: 0.70 (0.63, 0.78) for CVD, 0.70 (0.61, 0.82) for heart disease, 0.72 (0.63, 0.83) for stroke); while participants with the largest decrease had a 47%, 57%, and 35% higher risk for CVD, heart disease, and stroke, respectively. Each 10 points increase of LE8 score was associated with 27%-29% lower risk for these diseases. Similar results were observed in secondary analyses of 4-year changes (2006 - 2010) and 8-year changes (2006 - 2014) in LE8 score with CVD risk. These associations persisted in subgroup analysis stratified by risk factors of CVD. Conclusions: Improving adherence to LE8 score over a 6-year period was associated with lower risk of CVD, heart disease, and stroke, whereas decreased adherence to LE8 score was associated with higher risk. These findings support greater adherence to LE8 for improving CVH.
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