Body mass index and outcome after revascularization for symptomatic carotid artery stenosis

Objective: To determine whether the obesity paradox exists in patients who undergo carotid artery stenting (CAS) or carotid endarterectomy (CEA) for symptomatic carotid artery stenosis. Methods: We combined individual patient data from 2 randomized trials (Endarterectomy vs Angioplasty in Patients w...

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Hauptverfasser: Volkers, Eline J. (VerfasserIn) , Ringleb, Peter A. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: April 26, 2017
In: Neurology
Year: 2017, Jahrgang: 88, Heft: 21, Pages: 2052-2060
ISSN:1526-632X
DOI:10.1212/WNL.0000000000003957
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1212/WNL.0000000000003957
Verlag, Volltext: http://n.neurology.org/content/88/21/2052
Volltext
Verfasserangaben:Eline J. Volkers, MC, Jacoba P. Greving, PhD, Jeroen Hendrikse, PhD, Ale Algra, MD, PhD, L. Jaap Kappelle, MD, PhD, Jean-Pierre Becquemin, MD, Leo H. Bonati, MD, PhD, Thomas G. Brott, MD, Richard Bulbulia, MD, David Calvet, MD, PhD, Hans-Henning Eckstein, MD, PhD, Gustav Fraedrich, MD, John Gregson, PhD, Alison Halliday, MS, FRCS, George Howard, DrPH, Olav Jansen, MD, PhD, Gary S. Roubin, MD, PhD, Martin M. Brown, MD, FRCP, Jean-Louis Mas, MD, Peter A. Ringleb, MD, PhD

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520 |a Objective: To determine whether the obesity paradox exists in patients who undergo carotid artery stenting (CAS) or carotid endarterectomy (CEA) for symptomatic carotid artery stenosis. Methods: We combined individual patient data from 2 randomized trials (Endarterectomy vs Angioplasty in Patients with Symptomatic Severe Carotid Stenosis and Stent-Protected Angioplasty vs Carotid Endarterectomy) and 3 centers in a third trial (International Carotid Stenting Study). Baseline body mass index (BMI) was available for 1,969 patients and classified into 4 groups: <20, 20-<25, 25-<30, and ≥30 kg/m2. Primary outcome was stroke or death, investigated separately for the periprocedural and postprocedural period (≤120 days/>120 days after randomization). This outcome was compared between different BMI strata in CAS and CEA patients separately, and in the total group. We performed intention-to-treat multivariable Cox regression analyses. Results: Median follow-up was 2.0 years. Stroke or death occurred in 159 patients in the periprocedural (cumulative risk 8.1%) and in 270 patients in the postprocedural period (rate 4.8/100 person-years). BMI did not affect periprocedural risk of stroke or death for patients assigned to CAS (ptrend = 0.39) or CEA (ptrend = 0.77) or for the total group (ptrend = 0.48). Within the total group, patients with BMI 25-<30 had lower postprocedural risk of stroke or death than patients with BMI 20-<25 (BMI 25-<30 vs BMI 20-<25; hazard ratio 0.72; 95% confidence interval 0.55-0.94). Conclusions: BMI is not associated with periprocedural risk of stroke or death; however, BMI 25-<30 is associated with lower postprocedural risk than BMI 20-<25. These observations were similar for CAS and CEA. 
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