• J. Med. Internet Res. · Nov 2019

    A Scale to Assess the Methodological Quality of Studies Assessing Usability of Electronic Health Products and Services: Delphi Study Followed by Validity and Reliability Testing.

    • Anabela G Silva, Patrícia Simões, Rita Santos, Alexandra Queirós, Nelson P Rocha, and Mário Rodrigues.
    • School of Health Sciences, University of Aveiro, Aveiro, Portugal.
    • J. Med. Internet Res. 2019 Nov 15; 21 (11): e14829.

    BackgroundThe usability of electronic health (eHealth) and mobile health apps is of paramount importance as it impacts the quality of care. Methodological quality assessment is a common practice in the field of health for different designs and types of studies. However, we were unable to find a scale to assess the methodological quality of studies on the usability of eHealth products or services.ObjectiveThis study aimed to develop a scale to assess the methodological quality of studies assessing usability of mobile apps and to perform a preliminary analysis of of the scale's feasibility, reliability, and construct validity on studies assessing usability of mobile apps, measuring aspects of physical activity.MethodsA 3-round Delphi panel was used to generate a pool of items considered important when assessing the quality of studies on the usability of mobile apps. These items were used to write the scale and the guide to assist its use. The scale was then used to assess the quality of studies on usability of mobile apps for physical activity, and it assessed in terms of feasibility, interrater reliability, and construct validity.ResultsA total of 25 experts participated in the Delphi panel, and a 15-item scale was developed. This scale was shown to be feasible (time of application mean 13.10 [SD 2.59] min), reliable (intraclass correlation coefficient=0.81; 95% CI 0.55-0.93), and able to discriminate between low- and high-quality studies (high quality: mean 9.22 [SD 0.36]; low quality: mean 6.86 [SD 0.80]; P=.01).ConclusionsThe scale that was developed can be used both to assess the methodological quality of usability studies and to inform its planning.©Anabela G Silva, Patrícia Simões, Rita Santos, Alexandra Queirós, Nelson P Rocha, Mário Rodrigues. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 15.11.2019.

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