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Table 3 Cox regression analyses for association between BP level and stroke in population without antihypertensive treatments (n = 3118) (Forward Stepwise)

From: Elevated blood pressure level based on 2017 ACC/AHA guideline in relation to stroke risk in rural areas of Liaoning province

Variable

HR

95%CI

P-Value

Model 1

 BP level

  

0.047a

  normal

reference

  

  elevated

0.90

0.32–2.54

0.844

  stage1

0.98

0.46–2.05

0.947

  stage2

1.90

1.01–3.58

0.047

Age

1.06

1.03–1.08

< 0.001

Current drinking

1.86

1.13–3.04

0.014

Model 2

 SBP (per SD)

1.51

1.24–1.84

< 0.001

 Age

1.05

1.03–1.08

< 0.001

 Current drinking

1.88

1.15–3.08

0.012

Model 3

 SBP (per 20 mmHg)

1.46

1.21–1.76

< 0.001

 Age

1.05

1.03–1.07

< 0.001

 Current drinking

1.88

1.15–3.08

0.012

  1. Abbreviations: HR Hazard Ratios, CI confidence interval
  2. All the variables included in the analysis start including age, sex, ethnicity, education level, current smoking, current drinking, BMI, labor strength, dyslipidemia, diabetes, atrial fibrillation, coronary heart disease and antihypertensive medication
  3. arepresent the correct global p-value for the BP categorical variable included in the Cox model
  4. Model 1: the independent variable is BP level
  5. Model 2: the independent variable is SBP (per SD)/DBP (per SD)
  6. Model 3: the independent variable is SBP (per 20 mmHg)/DBP (per 20 mmHg)