TY - JOUR
T1 - Reproducibility of nighttime home blood pressure measured by a wrist-type nocturnal home blood pressure monitoring device
AU - Tomitani, Naoko
AU - Kanegae, Hiroshi
AU - Kario, Kazuomi
N1 - Publisher Copyright:
© 2021 The Authors. The Journal of Clinical Hypertension published by Wiley Periodicals LLC
PY - 2021/10
Y1 - 2021/10
N2 - The authors investigated the reproducibility of nighttime home blood pressure (BP) measured by a wrist-type BP monitoring device. Forty-six hypertensive patients (mean 69.0±11.6 years, 56.5% male) self-measured their nighttime BP hourly using simultaneously worn wrist-type and upper arm-type nocturnal home BP monitoring devices at home on two consecutive nights. Using the average 7.4±1.3 measurements on the first night and the average 7.0 ± 1.8 measurements on the second night, the authors assessed the reliability and the reproducibility of nighttime BP measured on the two nights. The difference between nights in systolic BP (SBP) measured by the wrist-device was not significant (1.6±7.0 mmHg, p =.124), while the difference in diastolic BP (DBP) was marginally significant (1.4±4.9 mmHg, p =.050). The intraclass correlation coefficients (ICCs) for agreement between nights were high both in SBP and DBP average (SBP: 0.835, DBP: 0.804). Averaging only three points of SBP resulted in lower ICC values, but still indicated good correlations (ICC > 0.6). On the other hand, the correlations of the standard deviation and average real variability of SBP between nights were low, with ICCs of 0.220 and 0.436, respectively. In conclusion, the average SBP values measured on the first night were reliable even when averaging only three readings. The reproducibility of nighttime BP variability seemed inferior to that of BP average; it might be better to measure nighttime BP over multiple nights to assess BP variability. However, this hypothesis needs verification in other study population. In addition, our study population had well-controlled BP, which limits the generalizability of this findings to all hypertensive patients.
AB - The authors investigated the reproducibility of nighttime home blood pressure (BP) measured by a wrist-type BP monitoring device. Forty-six hypertensive patients (mean 69.0±11.6 years, 56.5% male) self-measured their nighttime BP hourly using simultaneously worn wrist-type and upper arm-type nocturnal home BP monitoring devices at home on two consecutive nights. Using the average 7.4±1.3 measurements on the first night and the average 7.0 ± 1.8 measurements on the second night, the authors assessed the reliability and the reproducibility of nighttime BP measured on the two nights. The difference between nights in systolic BP (SBP) measured by the wrist-device was not significant (1.6±7.0 mmHg, p =.124), while the difference in diastolic BP (DBP) was marginally significant (1.4±4.9 mmHg, p =.050). The intraclass correlation coefficients (ICCs) for agreement between nights were high both in SBP and DBP average (SBP: 0.835, DBP: 0.804). Averaging only three points of SBP resulted in lower ICC values, but still indicated good correlations (ICC > 0.6). On the other hand, the correlations of the standard deviation and average real variability of SBP between nights were low, with ICCs of 0.220 and 0.436, respectively. In conclusion, the average SBP values measured on the first night were reliable even when averaging only three readings. The reproducibility of nighttime BP variability seemed inferior to that of BP average; it might be better to measure nighttime BP over multiple nights to assess BP variability. However, this hypothesis needs verification in other study population. In addition, our study population had well-controlled BP, which limits the generalizability of this findings to all hypertensive patients.
KW - nighttime blood pressure
KW - reproducibility of nighttime home blood pressure
KW - wrist-type home nocturnal blood pressure monitor
UR - http://www.scopus.com/inward/record.url?scp=85113137218&partnerID=8YFLogxK
U2 - 10.1111/jch.14342
DO - 10.1111/jch.14342
M3 - Article
C2 - 34418278
AN - SCOPUS:85113137218
SN - 1524-6175
VL - 23
SP - 1872
EP - 1878
JO - Journal of Clinical Hypertension
JF - Journal of Clinical Hypertension
IS - 10
ER -