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Table 1 The definition of risk factors

From: Discover high-risk factor combinations using Bayesian network from cohort data of National Stoke Screening in China

Risk factor Definition Values
Hypertension Blood pressure value≥140/90 mmHg and systolic pressure ≥ 140 mmHg and/or diastolic pressure ≥ 90 mmHg without taking anti-hypertensive drugs; with a history of hypertension or takes anti-hypertensive drugs within 2 weeks (blood pressure is taken after tranquillization three times in different days). Yes/No
Atrial Fibrillation Rapidly disordered fibrillation waves and disappearance of regular atrial electrical activity. (Those with a history of paroxysmal atrial fibrillation should be proved by the diagnosis of hospitals at county level or above.) Yes/No
Smoking Continuous or cumulative smoking for 6 months, smoking within 30 days prior to the survey, and smoking at least 1 cigarettes a day during the survey. Yes/No
Dyslipidemia Glycerin trilaurate TG ≥ 2.26 mmol/L; total cholesterol TCHO≥6.22 mmol/L; low density lipoprotein cholesterol LDL- C ≥ 4.14 mmol/L; high density lipoprotein cholesterol HDL-C < 1.04 mmol/L. Yes/No
Diabetes Fasting blood-glucose≥7.0 mmol/L; OGTT: 2 h blood-glucose ≥11.1 mmol/L; HbA1c > 6.5%; RBS ≥ 11.1 mmol/L for those with significant hyperglycemia or acute hyperglycemia symptoms; patients who have been diagnosed with diabetes and are being treated are considered to suffer from diabetes. Yes/No
Lack of exercise Taking exercise less than 3 times a week and less than 30 min each time for at least 1 year (those regularly participate in industrial and agricultural activities are excluded). Yes/No
Obvious overweight or obesity BMI(Body Mass Index) ≥ 26 Yes/No
Positive family history of stroke Those whose parents, children, siblings (with same parents) have a history of stroke. Yes/No