Table 4. Association between rise and fall of blood pressure and incident stroke, ischemic stroke, hemorrhagic stroke, and unspecified stroke.
Outcome | n/N | Tertile 1 | Tertile 2 HR | Tertile 3 | ||
---|---|---|---|---|---|---|
HR (95% CI) | p-Value | HR (95% CI) | p-Value | |||
Systolic blood pressure | ||||||
Any stroke | 971/9,958 | 1.27 (1.08–1.49) | <0.001 | 1 (ref) | 1.12 (0.95–1.32) | 0.17 |
Ischemic stroke | 641/9,958 | 1.09 (0.90–1.33) | 0.38 | 1 (ref) | 0.99 (0.82–1.21) | 0.95 |
Hemorrhagic stroke | 89/9,958 | 1.39 (0.81–2.38) | 0.24 | 1 (ref) | 1.45 (0.85–2.47) | 0.17 |
Unspecified stroke | 241/9,958 | 1.88 (1.31–2.70) | <0.001 | 1 (ref) | 1.50 (1.04–2.17) | 0.03 |
Diastolic blood pressure | ||||||
Any stroke | 971/9,955 | 1.10 (0.94–1.28) | 0.26 | 1 (ref) | 0.88 (0.74–1.03) | 0.11 |
Ischemic stroke | 641/9,955 | 1.04 (0.86–1.26) | 0.67 | 1 (ref) | 0.82 (0.67–1.00) | 0.06 |
Hemorrhagic stroke | 89/9,955 | 0.79 (0.47–1.33) | 0.38 | 1 (ref) | 0.84 (0.51–1.40) | 0.50 |
Unspecified stroke | 241/9,955 | 1.43 (1.01–2.01) | 0.04 | 1 (ref) | 1.10 (0.77–1.58) | 0.59 |
Tertiles 1, 2, and 3 for systolic blood pressure were <−0.4%/year, −0.4% to 2.1%/year, and >2.1%/year, respectively. Tertiles 1, 2, and 3 for diastolic blood pressure were <−0.8%/year, −0.8% to 2.0%/year, and >2.0%/year, respectively. Values in bold are statistically significant. Adjusted for age, sex, mean systolic or diastolic blood pressure, education, body mass index, alcohol consumption, smoking, cholesterol, high-density lipoprotein cholesterol, lipid-lowering medication use, blood-pressure-lowering medication use, anti-thrombotic medication use, type 2 diabetes mellitus, atrial fibrillation, prior coronary heart disease, and type of blood pressure measuring device. Standard deviation of variance of each tertile for systolic blood pressure: 0.04 (tertile 1), 0.03 (tertile 2), 0.03 (tertile 3). Standard deviation of variance of each tertile for diastolic blood pressure: 0.04 (tertile 1), 0.008 (tertile 2), 0.04 (tertile 3). n, number of participants with incident stroke; N, total study population; ref, reference.