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Table 3 Adjusted Hazard Ratios (HRs) of BP parameters for stroke according to age categories*

From: Blood pressure predictors of stroke in rural Chinese dwellers with hypertension: a large-scale prospective cohort study

BP parameters <  60 years (n = 3250) ≥ 60 years (n = 1847)
HRs (95% CI) P HRs (95% CI) P
All stroke
 SBP 1.734 (1.562–1.924) < 0.001 1.360 (1.216–1.522) < 0.001
 DBP 1.442 (1.288–1.616) < 0.001 1.304 (1.150–1.479) < 0.001
 PP 1.635 (1.451–1.842) < 0.001 1.228 (1.086–1.389) 0.001
 MAP 1.696 (1.534–1.874) < 0.001 1.337 (1.234–1.538) < 0.001
Ischemic Stroke
 SBP 1.524 (1.322–1.756) < 0.001 1.377 (1.198–1.582) < 0.001
 DBP 1.224 (1.041–1.439) 0.014 1.315 (1.125–1.537) 0.001
 PP 1.531 (1.308–1.793) < 0.001 1.244 (1.066–1.451) 0.005
 MAP 1.482 (1.289–1.703) < 0.001 1.392 (1.215–1.595) < 0.001
Hemorrhage stroke
 SBP 2.053 (1.757–2.398) < 0.001 1.328 (1.094–1.613) 0.004
 DBP 1.694 (1.457–1.970) < 0.001 1.280 (1.032–1.586) 0.024
 PP 1.788 (1.490–2.145) < 0.001 1.200 (0.972–1.481) 0.090
 MAP 2.003 (1.730–2.320) < 0.001 1.348 (1.113–1.632) 0.002
  1. Using the Cox proportional hazards model to calculate the Hazard Ratios of four BP parameters that was standardized for the risk of stroke incident. Adjusted variables: age (years), sex, ethnicity, BMI, HR, current smoking, current drinking, diabetes mellitus, anti-hypertension drug treatment, TC, TG, HDL-C, LDL-C
  2. BP blood pressure, SBP systolic blood pressure, DBP diastolic blood pressure, PP pulse pressure, MAP mean arterial pressure, BMI body mass index, HR heart rate, TC total cholesterol, TG triglycerides, HDL-C high-density lipoprotein cholesterol, LDL-C low-density lipoprotein cholesterol