Table 5. Epidemiological studies of BP and dementia.
| Study name | n, age (years) | Study period | Outcomes | BP and other outcome measures | Covariates | Associations with cognitive tasks |
|---|---|---|---|---|---|---|
| Baltimore43,88 | 101, 53–84 | Cross-sectional | Neuropsychological tests Memory | BP | D, E | AD prevalence associated with SBP <130 mmHg and DBP <70 mmHg |
| Honolulu Heart Program/Honolulu-AsiaAging89 | 1,890, 45–65 at enrollment, 83 ± 3.8 at follow-up | 32 years follow-up | Dementia, AD, VaD | SBP, DBP | D, HTN | SBP and DBP increased from midlife to late life, but decreased again in late life; dementia associated with SBP rise from midlife to late life, and with a greater SBP decrease (≥10 mmHg) in late life |
| OPTIMA90 | 477, >60 | 5 years follow-up | CAMCOG | BP | D | AD progression associated in a U-shape curve with DBP >110 mmHg and <60 mmHg; SBP not related to AD progression |
| US Veteran Affairs database111 | 819 enrolled, 491 men with CVD, >65 | 4 years follow-up | Dementia | BP control with ARBs, lisinopril, or other CVD drugs | D, CVD, DM | ARBs associated with lower incidence of AD and any dementia compared with lisinopril and other CVD drugs |
Abreviations: AD, Alzheimer disease; ARB, angiotensin-receptor blocker; BP, blood pressure; CAMCOG, Cambridge cognitive examination questionnaire; CVD, cardiovascular disease; D, demographic variables; DBP, diastolic blood pressure; DM, diabetes mellitus; E, education; HTN, hypertension; OPTIMA, Oxford Project to Investigate Memory and Aging; MCD, mild cognitive disorder; MCI, mild cognitive impairment; RF, risk factors (BMI, DM, HTN, cholesterol, smoking); SBP, systolic blood pressure; VaD, vascular dementia.