Contemporary LDL-cholesterol management in male and female patients at high-cardiovascular risk: results from the European observational SANTORINI study

Abstract Background Middle aged women have a faster increase in atherosclerotic cardiovascular disease (ASCVD) events than men over time. Undertreatment with guideline-recommended therapy in women may be one of the drivers for this burden. Purpose To compare high- or very high-risk male and female patients regarding contemporary 1-year low-density lipoprotein cholesterol (LDL-C) goal attainment, lipid-lowering therapy (LLT) intensity, and major adverse cardiovascular event (MACE) rate. Methods SANTORINI is an observational, prospective study that enrolled high- and very high-cardiovascular risk patients between March 2020 and Feb 2021, across 623 sites and 14 countries in Europe from primary & secondary care settings, with a further 1-year prospective follow-up. We included all patients with an LDL-C measurement at baseline and 1-year follow up (1yFU) for the current analysis. LDL-C goal attainment was defined separately for high and very-high risk categories according to 2019 ESC/EAS guidelines. Results Overall, 5197 males with a mean age of 65 years, and 2013 females with a mean age 66 years were included. At baseline, male patients had higher prevalence of pre-existing ASCVD (81.6% vs. 63.5%), and a lower prevalence of familial hypercholesterolaemia (8.7% vs. 17.2%) than female patients (Table 1). The proportion of patients reaching LDL-C goal improved from baseline to 1yFU, but was greater in males (22.9% and 33.3%, respectively) than females (16.9% and 24.6%, respectively). Similarly, the proportion of patients receiving no LLT decreased from baseline to 1yFU for both sexes, however, more females than males received no LLT at 1yFU (male: 20.7% to 2.7%; female: 23.9% to 3.9%). High intensity statin use increased for both sexes but was higher for males (22.2% to 27.3%) than for females (15.5% to 19.5%) at 1yFU. By contrast, PCSK9i use at baseline and 1yFU was lower for males (6.6% to 9.3%) than for females (9.8% to 13.4%). Nevertheless, the use of combination LLT at 1yFU was lower among females than males (male: 27.8% to 42.2%; female: 26.7% to 40.2%). During follow-up, MACE-4 was higher in males (5.31/100 patient years [PY]; 95% confidence interval [CI]: 4.68–5.95) than in females (3.63/100PY; 95% CI: 2.79–4.47). Similar results were observed for MACE-3 (Table 2). Conclusions Despite similar guideline recommendations, use of combination LLT and high intensity statin therapy was lower in female patients at high or very high cardiovascular risk than in m