Table 2.

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

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

Abbreviations: HR Hazard Ratios, CI confidence interval

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

^arepresent the correct global p-value for the BP categorical variable included in the Cox model

Model 1: the independent variable is BP level

Model 2: the independent variable is SBP (per SD)/DBP (per SD)

Model 3: the independent variable is SBP (per 20 mmHg)/DBP (per 20 mmHg)