Table of Contents Author Guidelines Submit a Manuscript
Journal of Healthcare Engineering
Volume 2016, Article ID 5136705, 13 pages
http://dx.doi.org/10.1155/2016/5136705
Research Article

Stress Detection Using Low Cost Heart Rate Sensors

Medical Informatics R&D Centre, University of Pannonia, Egyetem Utca 10, Veszprém 8200, Hungary

Received 11 March 2016; Accepted 5 May 2016

Academic Editor: Valentina Camomilla

Copyright © 2016 Mario Salai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The automated detection of stress is a central problem for ambient assisted living solutions. The paper presents the concepts and results of two studies targeted at stress detection with a low cost heart rate sensor, a chest belt. In the device validation study (), we compared heart rate data and other features from the belt to those measured by a gold standard device to assess the reliability of the sensor. With simple synchronization and data cleaning algorithm, we were able to select highly (>97%) correlated, low average error (2.2%) data segments of considerable length from the chest data for further processing. The protocol for the clinical study () included a relax phase followed by a phase with provoked mental stress, 10 minutes each. We developed a simple method for the detection of the stress using only three time-domain features of the heart rate signal. The method produced accuracy of 74.6%, sensitivity of 75.0%, and specificity of 74.2%, which is impressive compared to the performance of two state-of-the-art methods run on the same data. Since the proposed method uses only time-domain features, it can be efficiently implemented on mobile devices.