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Kidney Res Clin Pract. 2019 Jun;38(2):212-219. English. Original Article. https://doi.org/10.23876/j.krcp.18.0109
Jahromi SE , Haghighi G , Roozbeh J , Ebrahimi V .
Shiraz Nephro-Urology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. biostat.ebrahimiv@gmail.com
Department of Medicine, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Department of Biostatistics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran.
Colorectal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Abstract

Background

Automated office blood pressure (AOBP) machines measure blood pressure (BP) multiple times over a brief period. We aimed to compare the results of manual office blood pressure (MOBP) and AOBP methods with ambulatory BP monitoring (ABPM) in patients with chronic kidney disease (CKD).

Methods

This study was performed on 64 patients with CKD (stages 3–4). A nurse manually measured the BP on both arms using a mercury sphygmomanometer, followed by AOBP of the arm with the higher BP and then ABPM. Mean BP readings were compared by paired t test and Bland–Altman graphs.

Results

The mean ± standard deviation (SD) age of participants was 59.3 ± 13.6. The mean ± SD awake systolic BP obtained by ABPM was 140.2 ± 19.0 mmHg, which was lower than the MOBP and AOBP methods (156.6 ± 17.8 and 148.8 ± 18.6 mmHg, respectively; P < 0.001). The mean ± SD awake diastolic BP was 78.6 ± 13.2 mmHg by ABPM which was lower than the MOBP and AOBP methods (88.9 ± 13.2 and 84.1 ± 14.0 mmHg, respectively; P < 0.001). Using Bland–Altman graphs, MOBP systolic BP readings showed a bias of 16.4 mmHg, while AOBP measurements indicated a bias of 8.6 mmHg compared with ABPM.

Conclusion

AOBP methods may be more reliable than MOBP methods for determining BP in patients with CKD. However, the significantly higher mean BPs recorded by AOBP method suggested that AOBPs may not be as accurate as ABPM in patients with CKD.

Copyright © 2019. Korean Association of Medical Journal Editors.