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Table 2 Cox regression analyses for association between BP level and stroke in the total population(N = 3229) (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

  

0.011a

  normal

reference

  

  elevated

0.93

0.33–2.61

0.888

  stage1

0.96

0.46–2.02

0.920

  stage2

2.10

1.13–3.91

0.020

Age

1.06

1.03–1.08

< 0.001

Current drinking

1.76

1.09–2.84

0.021

Model 2

 SBP (per SD)

1.56

1.29–1.88

< 0.001

 Age

1.05

1.03–1.07

< 0.001

 Current drinking

1.80

1.12–2.90

0.016

Model 3

 SBP (per 20 mmHg)

1.51

1.27–1.80

< 0.001

 Age

1.05

1.03–1.07

< 0.001

 Current drinking

1.80

1.12–2.90

0.016

  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)