Cited by 1,592Blood Pressure and Hypertension StudiesCardiovascular Health and Disease PreventionSodium Intake and Health

Predicting Cardiovascular Risk Using Conventional vs Ambulatory Blood Pressure in Older Patients With Systolic Hypertension

Staessen, Jan A.·1999·JAMA

Abstract

CONTEXT: The clinical use of ambulatory blood pressure (BP) monitoring requires further validation in prospective outcome studies. OBJECTIVE: To compare the prognostic significance of conventional and ambulatory BP measurement in older patients with isolated systolic hypertension. DESIGN: Substudy to the double-blind placebo-controlled Systolic Hypertension in Europe (Syst-Eur) Trial, started in October 1988 with follow up to February 1999. The conventional BP at randomization was the mean of 6 readings (2 measurements in the sitting position at 3 visits 1 month apart). The baseline ambulatory BP was recorded with a noninvasive intermittent technique. SETTING: Family practices and outpatient clinics at primary and secondary referral hospitals. PARTICIPANTS: A total of 808 older (aged > or =60 years) patients whose untreated BP level on conventional measurement at baseline was 160 to 219 mm Hg systolic and less than 95 mm Hg diastolic. INTERVENTIONS: For the overall study, patients were randomized to nitrendipine (n = 415; 10-40 mg/d) with the possible addition of enalapril (5-20 mg/d) and/or hydrochlorothiazide (12.5-25.0 mg/d) or to matching placebos (n = 393). MAIN OUTCOME MEASURES: Total and cardiovascular mortality, all cardiovascular end points, fatal and nonfatal stroke, and fatal and nonfatal cardiac end points. RESULTS: After adjusting for sex, age, previous cardiovascular complications, smoking, and residence in western Europe, a 10-mm Hg higher conventional systolic BP at randomization was not associated with a worse prognosis, whereas in the placebo group, a 10-mm Hg higher 24-hour BP was associated with an increased relative hazard rate (HR) of most outcome measures (eg, HR, 1.23 [95% confidence interval [CI], 1.00-1.50] for total mortality and 1.34 [95% CI, 1.03-1.75] for cardiovascular mortality). In the placebo group, the nighttime systolic BP (12 AM-6 AM) more accurately predicted end points than the daytime level. Cardiovascular risk increased with a higher night-to-day ratio of systolic BP independent of the 24-hour BP (10% increase in night-to-day ratio; HR for all cardiovascular end points, 1.41; 95% CI, 1.03-1.94). At randomization, the cardiovascular risk conferred by a conventional systolic BP of 160 mm Hg was similar to that associated with a 24-hour daytime or nighttime systolic BP of 142 mm Hg (95% CI, 128-156 mm Hg), 145 mm Hg (95% CI, 126-164 mm Hg) or 132 mm Hg (95% CI, 120-145 mm Hg), respectively. In the active treatment group, systolic BP at randomization did not significantly predict cardiovascular risk, regardless of the technique of BP measurement. CONCLUSIONS: In untreated older patients with isolated systolic hypertension, ambulatory systolic BP was a significant predictor of cardiovascular risk over and above conventional BP.

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Crossref · 10.1001/jama.282.6.539

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Authors
Staessen, J. A.
Affiliations
KU Leuven (BE)
Corresponding author
Staessen, Jan A.
Venue
JAMA
Published
1999-08-11
Volume
282
Issue
6
Pages
539
ISSN
  • 0002-9955 (ISSN-L)
  • 0098-7484
OpenAlex
W2103015566
Cited by
1,592
References
0
Citations by year
2026: 11 · 2025: 21 · 2024: 24 · 2023: 25 · 2022: 26 · 2021: 25 · 2020: 38 · 2019: 41 · 2018: 51 · 2017: 53 · 2016: 65 · 2015: 61 · 2014: 68 · 2013: 95 · 2012: 71
FWCI
37.70
Type
journal article
Language
en
Open access
closed
Locations
  • JAMA (publishedVersion)
  • PubMed (publishedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Health Sciences › Nursing › Nutrition and Dietetics › Sodium Intake and Health
Keywords
isolated systolic hypertension, ambulatory blood pressure monitoring, cardiovascular risk prediction, older adults, nocturnal blood pressure dipping, 24-hour ambulatory blood pressure, cardiovascular mortality, stroke, nitrendipine, Syst-Eur trial, antihypertensive therapy
MeSH terms
Aged, Antihypertensive Agents, Blood Pressure Determination, Cardiovascular Diseases, Female, Humans, Hypertension, Male, Middle Aged, Prognosis, Risk Factors, Systole, Reproducibility of Results, Randomized Controlled Trials as Topic, Blood Pressure Monitoring, Ambulatory

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