%0 Journal Article
%@ 2291-5222
%I JMIR Publications
%V 6
%N 10
%P e11632
%T The QardioArm Blood Pressure App for Self-Measurement in an Obese Population: Validation Study Using the European Society of Hypertension International Protocol Revision 2010
%A Mazoteras-Pardo,Victoria
%A Becerro-De-Bengoa-Vallejo,Ricardo
%A Losa-Iglesias,Marta Elena
%A López-López,Daniel
%A Palomo-López,Patricia
%A Rodríguez-Sanz,David
%A Calvo-Lobo,César
%+ University Center of Plasencia, Universidad de Extremadura, Avda Virgen del Puerto, 2, Plasencia, 10600, Spain, 34 927 427 000 ext 248, patibiom@unex.es
%K obesity
%K blood pressure determination
%D 2018
%7 25.10.2018
%9 Original Paper
%J JMIR Mhealth Uhealth
%G English
%X Background: Obesity and high blood pressure (HBP) pose high cardiovascular risks, and they are frequent causes of cardiovascular disease. Objective: The aim of this study was to validate the mobile app QardioArm for high blood pressure monitoring in obese subjects (body mass index ≥30 kg/m2) according to guidelines in the European Society of Hypertension-International Protocol 2 (ESH-IP2). Methods: We recruited 33 obese subjects and measured their blood pressure using QardioArm (test device) and Omron M3 Intellisense (Omron Healthcare, Kyoto, Japan; standard device). We compared systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) according to the ESH-IP2. Results: A total of 95 of 99 differences for SBP and 91 of 99 for DBP displayed absolute differences within 10 mm Hg. A total of 98 of 99 differences for SBP and 98 of 99 for DBP exhibited absolute differences within 15 mm Hg. This result satisfied requirements for part 1 of the ESH-IP2. A total of 27 out of 33 individuals for SBP and 30 out of 33 individuals for DBP had a minimum of 2 of 3 comparisons within 5 mm Hg difference. None of the subjects had 3 differences outside 5 mm Hg for SBP and DBP, satisfying part 2 of the ESH-IP2. For HR measurements, a total of 90 of 99 differences had absolute differences within 3 beats per minute (bpm), and a total of 94 or 99 differences had absolute differences within 5 bpm. A total of 98 of 99 differences had absolute differences within 8 bpm. Therefore, the test device satisfied part 1 of ESH-IP2 criteria for HR. For part 2 of ESH-IP2, 31 of 33 individuals had a minimum of 2 of 3 comparisons within 3 bpm difference for HR. Only 1 of 33 subjects had 3 differences outside 3 bpm. Conclusions: To the best of our knowledge, this was the first study to show that an app that measures blood pressure and HR meets the requirements of the ESH-IP2 in an obese population. We believe the ESH-IP2 should publish explicit criteria for validation of blood pressure devices in specific populations. 
%M 30361193
%R 10.2196/11632
%U http://mhealth.jmir.org/2018/10/e11632/
%U https://doi.org/10.2196/11632
%U http://www.ncbi.nlm.nih.gov/pubmed/30361193