Abstract 39: Association of Cardiovascular Health With Time Lived Free of Coronary Artery Calcium

Abstract

Introduction: Zero coronary artery calcium (CAC) is associated with lower risk of cardiovascular disease. More time lived without CAC may delay coronary artery disease morbidity, but prediction of when CAC will first develop is not well understood. To inform cardiovascular prevention, we evaluated how cardiovascular health (CVH) relates to time lived without CAC. Methods: In Multi-Ethnic Study of Atherosclerosis (MESA) participants with zero CAC at baseline followed up to 10 years, we used Kaplan-Meier curves to estimate restricted mean survival time since study entry lived with zero CAC, by baseline CVH per Life’s Simple 7 metrics categorized as high (score 12-14), moderate (8-11), and low (0-7), and stratified by sex and age (45-64, 65-84 years). Results: Among 3416 participants without CAC at baseline (63% female, mean age 58 [SD 9] years, mean CVH score 8.8 [2.1]), mean years lived with zero CAC was 4.9 (SD 3.5) years. Women with high CVH lived on average 6.6 (95% CI 6.4-6.8) years with zero CAC, with moderate CVH 6.2 (6.1-6.3) years with zero CAC, and with low CVH 5.6 (5.3-5.8) years with zero CAC. Men with high CVH lived on average 6.4 (5.9-6.9) years with zero CAC, with moderate CVH 6.1 (5.9-6.3) years with zero CAC, and with low CVH 5.5 (5.1-5.9) years with zero CAC (Figure A). Among participants aged 45-64 years, those with high CVH lived on average 7.4 (7.1-7.6) years with zero CAC, with moderate CVH 6.8 (6.6-6.9) years with zero CAC, and with low CVH 5.9 (5.7-6.2) years with zero CAC. Among participants aged 65-84 years, those with high CVH lived on average 5.1 (4.5-5.7) years with zero CAC, with moderate CVH 5.2 (5.0-5.4) years with zero CAC, and with low CVH 4.9 (4.6-5.2) years with zero CAC (Figure B). Conclusions: High CVH was associated with longer time lived with zero CAC in women and men. Adults aged 45-64 years with high or intermediate CVH at baseline had longer time lived with zero CAC compared with those with low CVH. Older adults had no difference in time lived with zero CAC based on CVH. Maintaining CVH in midlife may delay onset of CAC.