[Analysis on the level of exposure and the cluster of risk factors to stroke for patients with non valvular atrial fibrillation].
OBJECTIVE
To analyze the level of exposure and cluster of risk factors to stroke for patients with non valvular atrial fibrillation.


METHODS
A questionnaire survey was conducted among 583 patients with non valvular atrial fibrillation, randomly selected from 8 general hospitals and 7 community health service centers located in the 8 districts in Beijing city in 2006.


RESULTS
133 patients attacked stroke and the prevalence of stroke in the total 583 patients was 22.8%. 78 patients attacked stroke after being diagnosed as atrial fibrillation with the prevalence related to atrial fibrillation as 14.3%. The levels of exposure related to age, duration of atrial fibrillation, histories of hypertension, diabetes and dyslipidemia were significantly different between stroke and non-stroke patients (P < 0.05). Data from multiple variables logistic regression analysis showed that age, duration of atrial fibrillation, history of dyslipidemia and history of diabetes increased the risk of stroke with odds ratio as 1.06, 2.08, 1.82, 1.79 respectively (95%CI was not including 1). The risk of stroke among those having 3 or 4 risk factors was 4.36 and 4.51 times of those without risk factor after adjusting for age, sex and duration of atrial fibrillation.


CONCLUSIONS
Age, duration of atrial fibrillation, history of dyslipidemia and history of diabetes were the main risk factors related to stroke and the clustering of risk factors would further increase the risk. It is important to control blood pressure, blood surge and lipid besides therapy of anticoagulation or antiplatelet for patients with nonvalvular atrial fibrillation.
Zuo
Hui-juan
HJ
Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Beijing 100029, China.
Su
Jiang-lian
JL
Yao
Chong-hua
CH
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001281:Atrial Fibrillation / Q000150:complications*; D002545:Brain Ischemia / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D016000:Cluster Analysis; D005260:Female; D006801:Humans; D008875:Middle Aged; D012307:Risk Factors; D012494:Sampling Studies; D020521:Stroke / Q000453:epidemiology*