Association between life's essential 8 score and 5-year all-cause and cardiovascular mortality in people with prediabetes: based on a cohort study

Abstract Background The Life's Essential 8 (LE8) score, which evaluates cardiovascular health (CVH) status, is linked to premature mortality in individuals with diabetes. However, the relationship between LE8 score and the risk of all-cause and cardiovascular mortality in individuals with prediabetes remains unclearly. Purpose This study aims to investigate the association between LE8 score and both all-cause and cardiovascular mortality among prediabetic patients within the United States population. Methods Our retrospective cohort study was based on the National Health and Nutrition Examination Survey (NHANES) data from 2005 to 2016. We selected prediabetic patients with blood glucose levels between normal and type 2 diabetes range from this database. The CVH status of these patients was categorized into low group (0-49), medium group (50-79), and high group (80-100) based on the LE8 score, which was assessed on a scale of 0 to 100. We constructed a multivariable Cox proportional hazards model to explore the relationship between LE8 score and mortality, and used restricted cubic spline curves to assess their non-linear correlation. Additionally, we conducted stratified analyses by age, gender, BMI, comorbid hypertension, and ASCVD in different populations to investigate the association between LE8 score and mortality. Results This study enrolled a total of 4,912 individuals with prediabetes (577 with low LE8 scores, 3,549 with medium LE8 scores, and 786 with high LE8 scores). Compared to the other groups, prediabetic patients with high LE8 scores exhibited younger age, lower BMI levels, a smaller proportion of Non-Hispanic Black individuals, higher education levels, and fewer clinical comorbidities. After adjusting for covariates using Cox proportional regression risk models, we observed that a low LE8 score was significantly associated with an increased rate of cardiovascular mortality (HR 4.13; 95% CI = 1.16-14.72) and all-cause mortality (HR 3.42; 95% CI = 1.73-6.74) in prediabetic patients. Restricted cubic splines demonstrated a linear trend between high LE8 scores and decreased risks of all-cause and cardiovascular mortality (P>0.05). Stratified analysis indicated that compared to the group with high LE8 scores, the group with low LE8 scores had a significantly higher risk of death within subgroups defined by age (≥65), gender, BMI<30, presence of hypertension, and absence of ASCVD. Conclusions In the American population, as the LE8 score increases, the risk of all-cause and cardiovascular mortality decreases for individuals with prediabetes over a 5-year period. Maintaining an ideal LE8 score will provide long-term benefits for individuals with prediabetes.Cox proportional regression modelRestricted cubic spline curves