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Text
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URL Address
<a href="http://doi.org/10.3122/jabfm.2019.05.190085" target="_blank" rel="noreferrer noopener">http://doi.org/10.3122/jabfm.2019.05.190085</a>
Pages
732-738
Issue
5
Volume
32
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Title
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Sources of Error in Office Blood Pressure Measurement
Publisher
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Journal of the American Board of Family Medicine: JABFM
Date
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2019
2019-10
Subject
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bias; Blood Pressure; end-digit preference; global burden; hypertension; Hypertension; mercury; Patient Positioning; Prehypertension; prevalence
October 2019 Update
Creator
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Morcos Roy N; Carter Kimbroe J; Castro Frank; Koirala Sumira; Sharma Deepti; Syed Haroon
Description
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PURPOSES: To evaluate 2 commonly overlooked sources of error in measuring blood pressure (BP) in the office, improper patient positioning and frequency of terminal digit bias (TDB) using manual and automated (BP) devices. METHODS: BPs recorded by 3 nurses using manual and automated devices were analyzed for TDB. In the next part of the study, 294 patients were recruited and tested with each patient's BP measured twice in the table position and compared with BP measured in the chair position. To eliminate concern for position sequence, a randomized controlled trial was initially conducted. RESULTS: Significant TDB for the digit zero was identified in BPs measured by all nurses using a manual device. No such bias was identified for any nurse when measuring BP with an automated device. For the positional study, the randomized controlled study showed no significant sequencing effect therefore the sequence of table then chair BP measurements was adopted. Significant BP lowering was observed in 128 patients (42.7%) in the chair compared with the table position. Misclassification of prehypertension and hypertension would have occurred in 15.3% and 16% of patients, respectively, when BP was recorded in the table instead of the chair position. CONCLUSIONS: Significant TDB was identified for all nurses when using a manual but not an automated device. Patient positioning on the examination table resulted in elevations of systolic and diastolic BPs.
Identifier
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<a href="http://doi.org/10.3122/jabfm.2019.05.190085" target="_blank" rel="noreferrer noopener">10.3122/jabfm.2019.05.190085</a>
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2019
Bias
Blood Pressure
Carter Kimbroe J
Castro Frank
Department of Family & Community Medicine
end-digit preference
global burden
Hypertension
Journal of the American Board of Family Medicine: JABFM
Koirala Sumira
mercury
Morcos Roy N
NEOMED College of Medicine
October 2019 Update
PATIENT positioning
Prehypertension
Prevalence
Sharma Deepti
Syed Haroon