Axel Haine1, Sarah Kavanagh2, Jeffrey S Berger3, Connie N Hess2, Lars Norgren4, F Gerry R Fowkes5, Brian G Katona6, Kenneth W Mahaffey7, Juuso I Blomster8, Manesh R Patel9, W Schuyler Jones9, Frank W Rockhold9, William R Hiatt10, Iris Baumgartner1. 1. Swiss Cardiovascular Centre, Inselspital, Division of Angiology, Bern University Hospital, University of Bern, Bern, Switzerland. 2. University of Colorado School of Medicine and CPC Clinical Research, Aurora, Colorado. 3. Departments of Medicine and Surgery, New York University School of Medicine, New York, New York. 4. Faculty of Medicine and Health, Örebro University, Örebro, Sweden. 5. Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, United Kingdom. 6. AstraZeneca Gaithersburg, Gaithersburg, Maryland. 7. Stanford Center for Clinical Research, Stanford University School of Medicine, Stanford, California. 8. Heart Centre, Turku University Hospital, Turku, Finland; University of Turku, Turku, Finland. 9. Duke Clinical Research Institute, Duke University School of Medicine, Durham, North Carolina. 10. University of Colorado School of Medicine and CPC Clinical Research, Aurora, Colorado. Electronic address: Will.Hiatt@cpcmed.org.
Abstract
BACKGROUND: Patients with peripheral artery disease (PAD) have a higher risk of major adverse cardiovascular events (MACE) compared with those without PAD. OBJECTIVES: The aim of this post hoc analysis was to evaluate sex-specific differences in MACE and limb events in the EUCLID (Examining Use of Ticagrelor in PAD) trial. METHODS: Cox proportional hazards models were used to compare time-to-event outcomes stratified by sex. Covariates were introduced after adjusted model selection. RESULTS: EUCLID enrolled 13,885 patients with PAD (28% women [n = 3,888]). PAD severity and medical treatment were comparable between sexes, whereas prior lower extremity revascularization was reported less frequently in women (54.8% vs. 57.3%; p = 0.006). Women were older (mean ± SD age: 67.8 ± 8.9 vs. 66.1 ± 8.2 years; p < 0.001) and more likely to have diabetes mellitus (p = 0.004), hypertension, hyperlipidemia, and chronic kidney disease (all p < 0.001). Over a mean follow-up of 30 months, women had a lower risk of MACE (9.5% vs. 11.2%; adjusted hazard ratio: 0.77; 95% confidence interval: 0.68 to 0.88; p < 0.001) and all-cause-mortality (7.6% vs. 9.7%; adjusted hazard ratio: 0.61; 95% confidence interval: 0.53 to 0.71; p < 0.001). In contrast, risk for major adverse limb events (2.6% vs. 3.0%) and hospitalization for acute limb ischemia (1.6% vs. 1.7%) were not different by sex. CONCLUSIONS: Although women with PAD are at lower risk for MACE and all-cause mortality, risk for limb events was similar between sexes over a mean follow-up of 30 months. Understanding sex-specific differences and dissociation between baseline cardiovascular risk and subsequent cardiovascular events requires further investigation. (A Study Comparing Cardiovascular Effects of Ticagrelor and Clopidogrel in Patients With Peripheral Artery Disease [EUCLID]; NCT01732822).
BACKGROUND:Patients with peripheral artery disease (PAD) have a higher risk of major adverse cardiovascular events (MACE) compared with those without PAD. OBJECTIVES: The aim of this post hoc analysis was to evaluate sex-specific differences in MACE and limb events in the EUCLID (Examining Use of Ticagrelor in PAD) trial. METHODS: Cox proportional hazards models were used to compare time-to-event outcomes stratified by sex. Covariates were introduced after adjusted model selection. RESULTS: EUCLID enrolled 13,885 patients with PAD (28% women [n = 3,888]). PAD severity and medical treatment were comparable between sexes, whereas prior lower extremity revascularization was reported less frequently in women (54.8% vs. 57.3%; p = 0.006). Women were older (mean ± SD age: 67.8 ± 8.9 vs. 66.1 ± 8.2 years; p < 0.001) and more likely to have diabetes mellitus (p = 0.004), hypertension, hyperlipidemia, and chronic kidney disease (all p < 0.001). Over a mean follow-up of 30 months, women had a lower risk of MACE (9.5% vs. 11.2%; adjusted hazard ratio: 0.77; 95% confidence interval: 0.68 to 0.88; p < 0.001) and all-cause-mortality (7.6% vs. 9.7%; adjusted hazard ratio: 0.61; 95% confidence interval: 0.53 to 0.71; p < 0.001). In contrast, risk for major adverse limb events (2.6% vs. 3.0%) and hospitalization for acute limb ischemia (1.6% vs. 1.7%) were not different by sex. CONCLUSIONS: Although women with PAD are at lower risk for MACE and all-cause mortality, risk for limb events was similar between sexes over a mean follow-up of 30 months. Understanding sex-specific differences and dissociation between baseline cardiovascular risk and subsequent cardiovascular events requires further investigation. (A Study Comparing Cardiovascular Effects of Ticagrelor and Clopidogrel in Patients With Peripheral Artery Disease [EUCLID]; NCT01732822).
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