Journal of Healthcare Engineering

Journal of Healthcare Engineering / 2015 / Article

Research Article | Open Access

Volume 6 |Article ID 761781 |

Heng Gan, Walter Karlen, Dustin Dunsmuir, Guohai Zhou, Michelle Chiu, Guy A. Dumont, J. Mark Ansermino, "The Performance of a Mobile Phone Respiratory Rate Counter Compared to the WHO ARI Timer", Journal of Healthcare Engineering, vol. 6, Article ID 761781, 14 pages, 2015.

The Performance of a Mobile Phone Respiratory Rate Counter Compared to the WHO ARI Timer

Received01 May 2015
Accepted01 Sep 2015


OBJECTIVE: To compare the accuracy and efficiency of the respiratory rate (RR) RRate mobile application to the WHO ARI Timer. METHODS: Volunteers used both devices to measure RR from reference videos of infants and children. Measurements were compared using correlation, Bland-Altman analysis, error metrics and time taken. RESULTS: Measurements with either device were highly correlated to the reference (r = 0.991 and r = 0.982), and to each other (r = 0.973). RRate had a larger bias than the ARI Timer (0.6 vs. 0.04 br/min), but tighter limits of agreement (−4.5 to 3.3 br/min vs. −5.5 to 5.5 br/min). RRate was more accurate than the ARI Timer (percentage error 10.6% vs. 14.8%, root mean square error 2.1 vs. 2.8 br/min and normalized root mean square error 5.6% vs. 7.5%). RRate measurements were 52.7 seconds (95% CI 50.4 s to 54.9 s) faster. CONCLUSION: During video observations, RRate measured RR quicker with a similar accuracy compared to the ARI Timer.

Copyright © 2015 Hindawi Publishing Corporation. 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.

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