[Combined effects of both cardiovascular disease family history and smoking on the incidence of ischemic stroke].

Zhonghua Liu Xing Bing Xue Za Zhi

Department of Epidemiology, School of Public Health, Medical College of Soochow University/Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Disease, Soochow University, Suzhou 215123, China.

Published: April 2016


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Article Abstract

Objective: To investigate the cumulative effect regarding the family history of cardiovascular disease and smoking on ischemic stroke events in population with Mongolian ethnicity.

Methods: Based on data gathered from the baseline investigation, a 10-year prospective cohort follow-up project was conducted among 2 589 participants with Mongolian ethnicity. Ischemic stroke events were defined as the outcomes of the study. All the 2 589 participants were categorized into four subgroups: without family history of cardiovascular disease/nonsmokers, without family history of cardiovascular disease/smokers, with family history of cardiovascular disease/nonsmokers and with family history of cardiovascular disease/smokers, according to family history of cardiovascular disease and smoking status. Cumlative incidence rates of events among the four subgroups was described with Kaplan-Meier curves. Cox proportional hazards model was used to estimate the hazard ratios (HRs) and 95% confidence intervals (95%CI) of ischemic stroke events among the four subgroups.

Results: Data from the Kaplan-Meier curves showed that the cumulative incidence rates of ischemic stroke were 1.17% (15/1 278), 3.83% (37/967), 5.70% (9/158) and 8.33% (15/180) for the groups of no family history of cardiovascular disease/nonsmokers, no family history of cardiovascular disease/smokers, with family history of cardiovascular disease/nonsmokers and with family history of cardiovascular disease/smokers, respectively. By cox proportional hazards model, after adjusting for age, male, drinking status, systolic and diastolic blood pressure, body mass index, fasting glucose, total cholesterol, triglycerides, LDL cholesterol factors, the HRs (95% CI) of ischemic stroke were 2.26 (1.19-4.28) and 2.45 (1.13-5.33) in the no family history of cardiovascular disease/smokers group, with family history of cardiovascular disease/smokers group when compared to the no family history of cardiovascular disease/nonsmokers group, respectively. The risk of ischemic stroke appeared the highest in the group with family history of cardiovascular disease/smokers (all P<0.05).

Conclusion: Smoking may increase the risk of ischemic stroke events among the population with family history of cardiovascular disease.

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http://dx.doi.org/10.3760/cma.j.issn.0254-6450.2016.04.007DOI Listing

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