Burden of Hyperlipidemia, Cardiovascular Mortality, and COVID-19: A Retrospective-Cohort Analysis of US Data.

Abstract

Background: Hyperlipidemia is a major cardiovascular disease (CVD) risk factor, but limited data on its mortality trends in CVD over time. We assessed annual hyperlipidemia-related CVD mortality trends in the United States, including the COVID-19 pandemic's impact.

Methods and results: Mortality data were obtained from CDC repository between 1999 and 2020 among patients ≥15 years old, using ICD-10 codes hyperlipidemia (E78.0-E78.5) and CVD (I00-I99). Age-adjusted mortality rates (AAMR) per 1,000,000 population was standardized to the 2000 US population. Log-linear regression models were used to evaluate mortality shifts. Average annual percentage change (AAPC) from 1999-2019 was used to project 2020 AAMR, estimating pandemic-attributed excess deaths. From 1999 to 2020, 483,155 hyperlipidemia-related CVD deaths occurred. Despite a general CVD mortality decline, hyperlipidemia-related CVD AAMR rose from 36.33 in 1999 to 99.77 in 2019. Ischemic heart diseases (AAMR 49.39) were the leading cause while hypertension had the highest mortality increase (AAPC +10.23%). Mortality rates were higher in males (AAMR 104.87), non-Hispanic (AAMR 82.49), and rural populations (AAMR 89.98). Highest mortality was observed in Black populations (AAMR 84.35), those ≥75 years (AAMR 646.45), and Western US regions (AAMR 96.88). During the first pandemic year, deaths exceeded projections by 10.55%, with notable increases among ages 35-75 (14.23%), Hispanic (17.96%), Black (14.82%), and urban (11.68%) groups.

Conclusions: Hyperlipidemia-related CVD mortality has risen over the past two decades, further heightened by the COVID-19 pandemic, with higher impact on males, Black Americans, the elderly, and rural residents. Further study is needed to understand contributing factors and mitigate disparities.