The Association of Stage 1 Hypertension Defined by the 2017 ACC/AHA Guideline with Stroke and Its Subtypes among Elderly Chinese

Table 2

Cox proportional hazards models and the PARs (%) for stroke and subtypes. (N = 7,503).

SBP/DBP categories (mm Hg)	Stroke			Ischemic stroke			Hemorrhagic stroke
	HR (95% CI)	value	PAR (95% CI), %	HR (95% CI)	value	PAR (95% CI), %	HR (95% CI)	value	PAR (95% CI), %
Model 1^a
<120/<80	1.00 (ref)			1.00 (ref)			1.00 (ref)
120–129/<80	1.05 (0.74–1.49)	0.779	1.28 (−7.00–11.05)	1.26 (0.82–1.94)	0.287	6.28 (−4.79–19.35)	0.78 (0.42–1.46)	0.440	−6.00 (−17.73–10.68)
130–139/80–89	1.54 (1.17–2.01)	0.002	12.00 (4.22–20.40)	1.76 (1.25–2.47)	0.001	16.23 (5.94–27.39)	1.26 (0.80–1.99)	0.315	6.36 (−5.42–20.40)
≥140/≥90	2.43 (1.90–3.12)	<0.001	26.62 (18.54–34.90)	2.74 (1.99–3.76)	<0.001	30.81 (20.26–41.46)	2.18 (1.44–3.29)	<0.001	23.32 (10.27–37.13)
Model 2^b
<120/<80	1.00 (ref)			1.00 (ref)			1.00 (ref)
120–129/<80	1.03 (0.73–1.46)	0.859	0.80 (−7.41–10.50)	1.23 (0.80–1.88)	0.349	5.51 (−5.41–18.46)	0.77 (0.41–1.43)	0.403	−6.46 (−18.06–10.06)
130–139/80–89	1.47 (1.12–1.92)	0.005	10.65 (3.02–18.98)	1.67 (1.18–2.34)	0.004	14.58 (4.46–25.65)	1.20 (0.76–1.90)	0.431	4.94 (−6.58–18.78)
≥140/≥90	2.30 (1.79–2.95)	<0.001	24.74 (16.72–33.02)	2.60 (1.89–3.57)	<0.001	29.09 (18.58–39.77)	1.99 (1.32–3.01)	0.001	20.40 (7.61–34.18)
Model 3^c
<120/<80	1.00 (ref)			1.00 (ref)			1.00 (ref)
120–129/<80	1.03 (0.72–1.46)	0.885	0.65 (−7.52–10.34)	1.22 (0.80–1.88)	0.357	5.41 (−5.50–18.37)	0.75 (0.40–1.41)	0.377	−6.82 (−18.27–9.62)
130–139/80–89	1.45 (1.11–1.90)	0.007	10.22 (2.64–18.56)	1.65 (1.17–2.33)	0.004	14.34 (4.23–25.41)	1.17 (0.74–1.85)	0.500	4.23 (−7.17–17.99)
≥140/≥90	2.04 (1.59–2.63)	<0.001	20.88 (12.91–29.23)	2.35 (1.70–3.25)	<0.001	25.76 (15.27–36.62)	1.71 (1.12–2.60)	0.013	15.43 (2.96–29.30)

CI = confidence interval, DBP = diastolic blood pressure, HR = hazard ratios, PAR = population attributable risk, SBP = systolic blood pressure. ^aModel 1: unadjusted. ^bModel 2: adjusted for age, sex, ethnicity, and education. ^cModel 3: adjusted for age, sex, ethnicity, education, body mass index, smoking, drinking, antihypertension treatment, physical activity, history of diabetes and hyperlipidemia, and family history of hypertension.