Long-term reproducibility of ambulatory blood pressure is superior to office blood pressure in the very elderly

Although it is known that reproducibility of ambulatory blood pressure (BP) is superior to office BP in middle-aged subjects, little is known in older age groups. Hence, we compared the long-term reproducibility of ambulatory and office BP readings in subjects over the age of 75 years. A cohort of 7...

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Veröffentlicht in:Journal of human hypertension 2010-11, Vol.24 (11), p.749-754
Hauptverfasser: Campbell, P, Ghuman, N, Wakefield, D, Wolfson, L, White, W B
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container_title Journal of human hypertension
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creator Campbell, P
Ghuman, N
Wakefield, D
Wolfson, L
White, W B
description Although it is known that reproducibility of ambulatory blood pressure (BP) is superior to office BP in middle-aged subjects, little is known in older age groups. Hence, we compared the long-term reproducibility of ambulatory and office BP readings in subjects over the age of 75 years. A cohort of 72 subjects 75–90 years of age (mean, 82 years at baseline) had repeat office and ambulatory BPs 2 years apart under similar conditions. On the same day, patients underwent office BP measurements by a semi-automated device and then by ambulatory BP monitoring. Awake and sleep periods were divided according to a diary kept by each patient. The agreement between studies was assessed using the standard deviation of the differences (SDD) and Bland–Altman plots. There were minimal mean changes in office, 24-h, and awake and sleep mean BP values between baseline and 2 years later. The SDDs between visits were lower for 24-h BP compared with the office BP (11.7/5.9 mm Hg versus 17.8/9.0 mm Hg, P
doi_str_mv 10.1038/jhh.2010.8
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Nocturnal BPs defined by absolute values were more reproducible than categories of dippers and non-dippers. These data demonstrate that long-term reproducibility of 24-h BP is superior to office measurements for very elderly subjects. In a clinical trial involving this age group, far fewer subjects would be required if 24-h BP was the primary efficacy endpoint rather than the office BP.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>20200549</pmid><doi>10.1038/jhh.2010.8</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0950-9240
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subjects 692/699/75/243
692/700/139/1735
692/700/1518
Age Factors
Aged
Aged, 80 and over
Arterial hypertension. Arterial hypotension
Biological and medical sciences
Blood and lymphatic vessels
Blood Pressure
Blood Pressure Determination - methods
Blood Pressure Monitoring, Ambulatory
Brain - pathology
Cardiology. Vascular system
Circadian Rhythm
Clinical manifestations. Epidemiology. Investigative techniques. Etiology
Cognition
Cohort Studies
Complications and side effects
Diagnosis
Epidemiology
Health Administration
Health aspects
Health Services for the Aged
Humans
Hypertension
Magnetic Resonance Imaging
Measurement
Medical sciences
Medicine
Medicine & Public Health
Office Visits
original-article
Patients
Predictive Value of Tests
Public Health
Reproducibility
Reproducibility of Results
Sleep
Time Factors
title Long-term reproducibility of ambulatory blood pressure is superior to office blood pressure in the very elderly
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