Gender differences in the treatment with PCSK9 monoclonal antibodies real world experience from a dedicated prevention clinic

Abstract Background Proprotein convertase subtilisin/kexin type 9 monoclonal antibodies (PCSK9 mAb) lower low-density lipoprotein cholesterol (LDL-C) levels and reduce atherosclerotic cardiovascular disease (ASCVD). There are gender differences in PCSK9 biological characteristics, which are not properly addressed in current data. Purpose Examining gender differences in treatment with PCSK9 mAb. Methods A retrospective study based on data from the Prevention Cardiology Clinic in Rabin Medical Center. Included were patients prescribed with PCSK9 mAb (evolocumab or alirocumab), for primary or secondary prevention. Data included medical background and treatment variables. Response to treatment was evaluated by changes in LDL-C at 3 and 12 months. Data was analyzed by gender. Results Study included 246 patients (mean age 67y, ASCVD 78.8%, mean baseline LDL-C 128.2 mg/dL). Women (42% of cohort) prescribed with PCSK9 mAb were older than men (69 vs. 65 years, respectively; p<0.001). The dominant indication for PCSK9 mAb for both genders was secondary prevention, while primary prevention indication was more prevalent in women vs. men (39.4% vs. 16.3%, respectively; p<0.001). Statin intolerance was observed in 82.4% and 58.6% were treated with combination therapy with PCSK9 mAb, without significant gender differences. Baseline mean LDL-C was higher among women vs. men (138.9 vs. 117.3 mg/dL; p<0.001). Overall, high adherence was observed (91.8% and 79.7% at 3 and 12 months, respectively). After 1-year, adherent men had lower LDL-C levels than women (46.8 mg/d and 61.9 mg/dL, respectively; P=0.001), and were more likely to reach their LDL-C therapy goals; below 70 mg/dL (76.1% vs. 62.2%, respectively; P=0.032) and below 55 mg/dL (60.1% vs. 39.8% respectively; P=0.003). Conclusions In patients treated with PCSK9 mAb, gender differences exist in prescription age, indications, baseline LDL-C and achieved LDL-C goals. In this study adherence to PCSK9 mAb was higher than reported before, possibly due to surveillance in a dedicated prevention clinic.LDL-C & Non-HDL-C levels under PCSK9 mABSex Differences in acheived LDL-C goals