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International Journal of Hypertension
Volume 2015, Article ID 801709, 5 pages
http://dx.doi.org/10.1155/2015/801709
Clinical Study

A Comparison of Casual In-Clinic Blood Pressure Measurements to Standardized Guideline-Concordant Measurements in Severely Obese Individuals

1Department of Medicine, University of Alberta, Edmonton, AB, Canada T6G 2G3
2Alberta Diabetes Institute, Edmonton, AB, Canada T6G 2E1

Received 25 May 2015; Accepted 21 July 2015

Academic Editor: Hiromi Rakugi

Copyright © 2015 Sana Vahidy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background/Objectives. The objective of this study was to compare casual BP taken in a bariatric clinic to standardized guideline-concordant BP. Subjects/Methods. A cross sectional analysis was performed using baseline data from a weight management trial. Patients were recruited from a Canadian bariatric care program. Standardized BP was performed using a Watch BP oscillometric device. Casual in-clinic BP single readings, taken using a Welch Allyn oscillometric device, were chart-abstracted. Paired -tests, Bland-Altman plots, and Pearson’s correlations were used for analysis. Results. Data from 134 patients were analyzed. Mean age was 41.5 ± 8.9 y, mean BMI was 46.8 ± 6.5 kg/m2, and 40 (30%) had prior hypertension. Mean casual in-clinic BP was 128.8 ± 14.1/81.6 ± 9.9 mmHg and mean standardized BP was 133.2 ± 15.0/82.0 ± 10.3 mmHg (difference of −4.3 ± 12.0 for systolic () and −0.4 ± 10.0 mmHg for diastolic BP ()). Pearson’s coefficients were 0.66 () for SBP and 0.50 () for DBP. 28.4% of casual versus 26.9% of standardized measurements were ≥140/90 mmHg (). Conclusion. In this bariatric clinic, casual BP was unexpectedly lower than standardized BP. This could potentially lead to the underdiagnosis of hypertension.