The Korean journal of internal medicine

The Korean Association of Internal Medicine (대한내과학회)
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Diagnostic accuracy of manual office blood pressure measurement in ambulatory hypertensive patients in Korea

  • Kim, Sehun (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Park, Jin Joo (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Lee, Seung-Ah (Department of Internal Medicine, National Medical Center) ;
  • Cho, Youngjin (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Yoon, Yeonyee E. (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Oh, Il-Young (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Yoon, Chang-Hwan (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Suh, Jung-Won (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Cho, Young-Seok (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Youn, Tae-Jin (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Cho, Goo-Yeong (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Chae, In-Ho (Department of Internal Medicine, Seoul National University Bundang Hospital) ;
  • Lee, Hae-Young (Department of Internal Medicine, Seoul National University Hospital) ;
  • Shin, Jinho (Department of Internal Medicine, Hanyang University Seoul Hospital) ;
  • Park, Sungha (Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine) ;
  • Choi, Dong-Ju (Department of Internal Medicine, Seoul National University Bundang Hospital)
  • Received : 2016.05.11
  • Accepted : 2016.10.05
  • Published : 2018.01.01
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Abstract

Background/Aims: Currently, office blood pressure (OBP) is the most widely used method of measuring blood pressure (BP) in daily clinical practice. However, data on the diagnostic accuracy of OBP in reference to ambulatory blood pressure (ABP) are scarce in Korea. Methods: In retrospective and prospective cohorts, manual OBP and ABP measurements were compared among ambulatory hypertensive patients. Hypertension was defined as systolic OBP ${\geq}$ 140 mmHg and/or diastolic OBP ${\geq}$ 90 mmHg, and systolic ABP ${\geq}$ 130 mmHg and/or diastolic ABP ${\geq}$ 80 mmHg. Results: In the retrospective cohort (n = 903), the mean $OBP_1$ (before ABP measurement) was higher than ABP in both systolic ($138{\pm}17mmHg$ vs. $123{\pm}13mmHg$, p < 0.001) and diastolic ($84{\pm}12mmHg$ vs. $78{\pm}11mmHg$, p < 0.001) measurements. Interestingly, there was only a weak correlation between OBP and ABP ($r^2=0.038$, p < 0.001). The overall discordance rate of OBP compared to ABP, which is the reference method for measuring BP, was 43.9%. The prospective cohort (n = 57) showed similar results. In a subgroup analysis, male patients had higher false negative results (masked or under-treated hypertension) than did female patients (26.1% vs. 17.8%, p = 0.003), whereas female patients had a higher false positive rate (white-coat or over-treated hypertension) than did male patients (28.7% vs. 15.2%, p < 0.001). Conclusions: The diagnostic accuracy of manual OBP is low in reference to ABP. Men and women have different patterns of discordance. These findings indicate that management of hypertensive patients with manual OBP measurements may be suboptimal and encourages the use of ABP in ambulatory hypertensive patients.

Keywords

Acknowledgement

Supported by : Centers for Disease Control and Prevention

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