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Abstract
Home blood pressure (HBP) is useful to decide whether blood pressure (BP) is controlled. However, applying HBP to daily clinical practices is still challenging without easy access to the average HBP. Therefore, we developed a simple method to make a quick decision regarding the controlledness of HBP through high BP counts. We simulated 100 cases of HBP series for each combination of 3 numbers of BP readings (K = 16, 20, 24) and 4 levels of the standard deviations (SDs = 5, 10, 15, 20). A high BP was defined as an individual BP ≥ 135/85 mmHg, and an uncontrolled HBP was defined as a mean HBP ≥ 135/85 mmHg. Validation for the decision method was conducted using actual HBP data. The C-statistics and the accuracy of the high BP counts for the uncontrolled HBP were generally high (> 0.85) for all combinations of Ks and SDs and decreased as SDs increased but remained steady as Ks increased. In validation, the C-statistic of the high BP count-to-total BP reading (C/T) ratio was 0.985, and the C/T ratio ≥ 0.5 showed a sensitivity of 0.957, a specificity of 0.907, and an accuracy of 0.927. The count-based decision method can provide an accurate quick assessment of the controlledness of HBP.
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1 Hanyang University Medical Center, Division of Cardiology, Department of Internal Medicine, Seoul, Republic of Korea (GRID:grid.411986.3) (ISNI:0000 0004 4671 5423)
2 Hanyang University Guri Hospital, Division of Cardiology, Department of Internal Medicine, Guri City, Republic of Korea (GRID:grid.412145.7) (ISNI:0000 0004 0647 3212)
3 The Catholic University of Korea, and Catholic Research Institute for Intractable Cardiovascular Disease, College of Medicine, The Catholic University of Korea, Division of Cardiology, Department of Internal Medicine, Seoul, Republic of Korea (GRID:grid.411947.e) (ISNI:0000 0004 0470 4224)