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Primary prevention of stroke by healthy lifestyle.

ABSTRACT: BACKGROUND:The combination of healthy lifestyle factors is associated with lower risk of coronary heart disease, diabetes, and total cardiovascular disease. Little is known about the impact of multiple lifestyle factors on the risk of stroke. METHODS AND RESULTS:We conducted a prospective cohort study among 43,685 men from the Health Professionals Follow-up Study and 71,243 women from the Nurses' Health Study. Diet and other lifestyle factors were updated from self-reported questionnaires. We defined a low-risk lifestyle as not smoking, a body mass index <25 kg/m(2), >or=30 min/d of moderate activity, modest alcohol consumption (men, 5 to 30 g/d; women, 5 to 15 g/d), and scoring within the top 40% of a healthy diet score. We documented 1559 strokes (853 ischemic, 278 hemorrhagic) among women and 994 strokes (600 ischemic, 161 hemorrhagic) among men during follow-up. Women with all 5 low-risk factors had a relative risk of 0.21 (95% confidence interval [CI], 0.12, 0.36) for total and 0.19 (95% CI, 0.09, 0.40) for ischemic stroke compared with women who had none of these factors. Among men, the relative risks were 0.31 (95% CI, 0.19, 0.53) for total and 0.20 (95% CI, 0.10, 0.42) for ischemic stroke for the same comparison. Among the women, 47% (95% CI, 18 to 69) of total and 54% (95% CI, 15 to 78%) of ischemic stroke cases were attributable to lack of adherence to a low-risk lifestyle; among the men, 35% (95% CI, 7 to 58) of total and 52% (95% CI, 19 to 75) of ischemic stroke may have been prevented. CONCLUSIONS:A low-risk lifestyle that is associated with a reduced risk of multiple chronic diseases also may be beneficial in the prevention of stroke, especially ischemic stroke.

SUBMITTER: Chiuve SE

PROVIDER: S-EPMC2730914 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature

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Primary prevention of stroke by healthy lifestyle.

Chiuve Stephanie E SE Rexrode Kathryn M KM Spiegelman Donna D Logroscino Giancarlo G Manson JoAnn E JE Rimm Eric B EB

Circulation 20080812 9

<h4>Background</h4>The combination of healthy lifestyle factors is associated with lower risk of coronary heart disease, diabetes, and total cardiovascular disease. Little is known about the impact of multiple lifestyle factors on the risk of stroke.<h4>Methods and results</h4>We conducted a prospective cohort study among 43,685 men from the Health Professionals Follow-up Study and 71,243 women from the Nurses' Health Study. Diet and other lifestyle factors were updated from self-reported questi ...[more]

PMID: 18697819

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Project description:IntroductionLifestyle interventions are shown to be effective in improving cardiovascular disease (CVD) risk factors. It has been suggested that general practitioners can play an essential role in CVD prevention. However, studies into lifestyle interventions for primary care patients at high cardiovascular risk are scarce and structural implementation of lifestyle interventions can be challenging. Therefore, this study aims to (1) evaluate (cost-)effectiveness of implementation of an integrated group-based lifestyle programme in primary care practices; (2) identify effective intervention elements and (3) identify implementation determinants of an integrated group-based lifestyle intervention for patients with high cardiovascular risk.Methods and analysisThe Healthy Heart study is a non-randomised cluster stepped-wedge trial. Primary care practices will first offer standard care during a control period of 2-6 months, after which practices will switch (step) to the intervention, offering participants a choice between a group-based lifestyle programme or standard care. Participants enrolled during the control period (standard care) will be compared with participants enrolled during the intervention period (combined standard care and group-based lifestyle intervention). We aim to include 1600 primary care patients with high cardiovascular risk from 55 primary care practices in the area of The Hague, the Netherlands. A mixed-methods process evaluation will be used to simultaneously assess effectiveness and implementation outcomes. The primary outcome measure will be achievement of individual lifestyle goals after 6 months. Secondary outcomes include lifestyle change of five lifestyle components (smoking, alcohol consumption, diet, weight and physical activity) and improvement of quality of life and self-efficacy. Outcomes are assessed using validated questionnaires at baseline and 3, 6, 12 and 24 months of follow-up. Routine care data will be used to compare blood pressure and cholesterol levels. Cost-effectiveness of the lifestyle intervention will be evaluated. Implementation outcomes will be assessed using the RE-AIM model, to assesses five dimensions of implementation at different levels of organisation: reach, efficacy, adoption, implementation and maintenance. Determinants of adoption and implementation will be assessed using focus groups consisting of professionals and patients.Ethics and disseminationThis study is approved by the Ethics Committee of the Leiden University Medical Center (P17.079). Results will be shared with the primary care group, healthcare providers and patients, and will be disseminated through journal publications and conference presentations.Trial registration numberNL60795.058.17. Status: pre-results.

Project description:Background and objectivesThe use of surrogate end points can decrease sample size while maintaining statistical power. This report considers incident stroke symptoms as a surrogate end point in a post hoc analysis of asymptomatic patients from the multicenter, randomized Carotid Revascularization Endarterectomy vs Stenting Trial (CREST).MethodsCREST assessed stroke symptoms using the Questionnaire for Verifying Stroke-free Status (QVSS) at baseline and follow-up. While the primary analysis of CREST defined "asymptomatic" as having been free of stroke/transient ischemic attack for 180 days, herein the population was further restricted by requiring no stroke symptoms at baseline. Incident adjudicated stroke was defined the same as for the primary analysis; incident stroke symptoms was defined as developing ≥1 stroke symptom in follow-up. Treatment differences between stenting (CAS) and endarterectomy (CEA) were assessed for 3 end points: adjudicated stroke, stroke symptoms, and adjudicated stroke or stroke symptoms.ResultsThe cohort included 826 of the 1,181 asymptomatic patients in CREST. Adjudicated stroke events occurred in 44 patients, and incident stroke symptoms occurred in 183. Analysis of adjudicated stroke end points demonstrated a nonsignificant hazard ratio (HR) for CAS compared with CEA of 1.02 (95% CI 0.57-1.85). The corresponding HR for the incident stroke symptoms outcome was 1.54 (95% CI 1.15-2.08), and the HR for the composite outcome of adjudicated stroke or incident symptoms was 1.38 (95% CI 1.04-1.83), both significant.DiscussionThe low stroke event rates in asymptomatic patients challenges the assessment of CAS-versus-CEA treatment differences. Incorporating incident stroke symptoms as a surrogate outcome increased the number of events by over 4-fold. The analysis demonstrated a previously unreported significant difference in cerebrovascular risk with CAS compared with CEA. We propose that broadening the end points of primary stroke prevention trials to include surrogate events such as incident stroke symptoms could make trials more feasible.

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Primary prevention of stroke by healthy lifestyle.

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Primary prevention of stroke by healthy lifestyle.

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