Staff View: Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method

Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method

ObjectiveUrine colorimetry using a digital image-based colorimetry is potentially an accessible hydration assessment method. This study evaluated the agreement between urine colorimetry values measured with different smartphone brands under various lighting conditions in patients with dengue fever....

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Main Authors:	Noor Azhar, Abdul Muhaimin, Bustam, Aidawati, Naseem, Fathmath Sausan, Shuin, Soo Siew, Md Yusuf, Mohd Hafyzuddin, Hishamudin, Naseeha Ubaidi, Poh, Khadijah
Format:	Article
Published:	SAGE Publications Ltd 2023
Subjects:	Medical technology RA0421 Public health. Hygiene. Preventive Medicine
Online Access:	http://eprints.um.edu.my/38963/
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spelling	my.um.eprints.389632023-11-30T06:19:06Z http://eprints.um.edu.my/38963/ Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method Noor Azhar, Abdul Muhaimin Bustam, Aidawati Naseem, Fathmath Sausan Shuin, Soo Siew Md Yusuf, Mohd Hafyzuddin Hishamudin, Naseeha Ubaidi Poh, Khadijah Medical technology RA0421 Public health. Hygiene. Preventive Medicine ObjectiveUrine colorimetry using a digital image-based colorimetry is potentially an accessible hydration assessment method. This study evaluated the agreement between urine colorimetry values measured with different smartphone brands under various lighting conditions in patients with dengue fever. MethodsThe urine samples were photographed in a customized photo box, under five simulated lighting conditions, using five smartphones. These images were analyzed using Adobe Photoshop to obtain urine Red, Green and Blue (RGB) values with and without colour correction. A commercially available colour calibration card was used for colour correction. Using intraclass correlation coefficient (ICC), inter-phone and intra-phone agreements of urine RGB values were analyzed. ResultsWithout colour correction, the various smartphones produced the highest agreement for Blue and Green values under the `daylight' lighting condition. With colour correction, ICC values showed `exceptional' inter-phone and intra-phone agreement for the Blue and Green values (ICC > 0.9). Red values showed `poor' (ICC < 0.5) agreement with and without colour correction in all lighting conditions. Out of the five phones compared in this study, Phone 4 produced the lowest intra-phone agreement. ConclusionsColour calibration using photo colour cards improved the reliability of smartphone-based urine colorimetry, making this a promising point-of-care hydration assessment tool using the ubiquitous smartphone. SAGE Publications Ltd 2023 Article PeerReviewed Noor Azhar, Abdul Muhaimin and Bustam, Aidawati and Naseem, Fathmath Sausan and Shuin, Soo Siew and Md Yusuf, Mohd Hafyzuddin and Hishamudin, Naseeha Ubaidi and Poh, Khadijah (2023) Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method. Digital Health, 9. ISSN 2055-2076, DOI https://doi.org/10.1177/20552076231154684 <https://doi.org/10.1177/20552076231154684>. 10.1177/20552076231154684
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	Medical technology RA0421 Public health. Hygiene. Preventive Medicine
spellingShingle	Medical technology RA0421 Public health. Hygiene. Preventive Medicine Noor Azhar, Abdul Muhaimin Bustam, Aidawati Naseem, Fathmath Sausan Shuin, Soo Siew Md Yusuf, Mohd Hafyzuddin Hishamudin, Naseeha Ubaidi Poh, Khadijah Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
description	ObjectiveUrine colorimetry using a digital image-based colorimetry is potentially an accessible hydration assessment method. This study evaluated the agreement between urine colorimetry values measured with different smartphone brands under various lighting conditions in patients with dengue fever. MethodsThe urine samples were photographed in a customized photo box, under five simulated lighting conditions, using five smartphones. These images were analyzed using Adobe Photoshop to obtain urine Red, Green and Blue (RGB) values with and without colour correction. A commercially available colour calibration card was used for colour correction. Using intraclass correlation coefficient (ICC), inter-phone and intra-phone agreements of urine RGB values were analyzed. ResultsWithout colour correction, the various smartphones produced the highest agreement for Blue and Green values under the `daylight' lighting condition. With colour correction, ICC values showed `exceptional' inter-phone and intra-phone agreement for the Blue and Green values (ICC > 0.9). Red values showed `poor' (ICC < 0.5) agreement with and without colour correction in all lighting conditions. Out of the five phones compared in this study, Phone 4 produced the lowest intra-phone agreement. ConclusionsColour calibration using photo colour cards improved the reliability of smartphone-based urine colorimetry, making this a promising point-of-care hydration assessment tool using the ubiquitous smartphone.
format	Article
author	Noor Azhar, Abdul Muhaimin Bustam, Aidawati Naseem, Fathmath Sausan Shuin, Soo Siew Md Yusuf, Mohd Hafyzuddin Hishamudin, Naseeha Ubaidi Poh, Khadijah
author_facet	Noor Azhar, Abdul Muhaimin Bustam, Aidawati Naseem, Fathmath Sausan Shuin, Soo Siew Md Yusuf, Mohd Hafyzuddin Hishamudin, Naseeha Ubaidi Poh, Khadijah
author_sort	Noor Azhar, Abdul Muhaimin
title	Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
title_short	Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
title_full	Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
title_fullStr	Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
title_full_unstemmed	Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
title_sort	improving the reliability of smartphone-based urine colorimetry using a colour card calibration method
publisher	SAGE Publications Ltd
publishDate	2023
url	http://eprints.um.edu.my/38963/
_version_	1784511856470130688
score	13.211869

Improving the reliability of smartphone-based urine colorimetry using a colour card calibration method

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