June 2022
Volume 63, Issue 7
Open Access
ARVO Annual Meeting Abstract  |   June 2022
Assessing Usability of Digital Health Devices for Blood Pressure Monitoring among Glaucoma Patients
Author Affiliations & Notes
  • Sonali Bhanvadia
    Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, California, United States
    Health Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States
  • Manreet Brar
    Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, California, United States
    Health Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States
  • Bharanidharan Radha Saseendrakumar
    Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, California, United States
    Health Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States
  • Sally Baxter
    Viterbi Family Department of Ophthalmology and Shiley Eye Institute, University of California San Diego, La Jolla, California, United States
    Health Department of Biomedical Informatics, University of California San Diego, La Jolla, California, United States
  • Footnotes
    Commercial Relationships   Sonali Bhanvadia None; Manreet Brar None; Bharanidharan Radha Saseendrakumar None; Sally Baxter None
  • Footnotes
    Support  NIH/Office of the Director DP5OD029610, NIH/NEI P30EY022589, Unrestricted departmental grant for Research to Prevent Blindness, NIH/NEI R01EY029058, R01EY11008, R01EY19869, R01EY027510, R01EY026574, R01EY018926
Investigative Ophthalmology & Visual Science June 2022, Vol.63, 1388 – A0084. doi:
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    • Get Citation

      Sonali Bhanvadia, Manreet Brar, Bharanidharan Radha Saseendrakumar, Sally Baxter; Assessing Usability of Digital Health Devices for Blood Pressure Monitoring among Glaucoma Patients. Invest. Ophthalmol. Vis. Sci. 2022;63(7):1388 – A0084.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Blood pressure (BP) dysregulation is a known risk factor for glaucoma and home BP monitoring is increasingly common. However, little is known about glaucoma patients’ ability to use digital health devices. We performed a pilot mixed-methods study with glaucoma patients to evaluate digital health literacy and usability of a commercially available BP smartwatch monitor.

Methods : Adult participants were recruited from the Diagnostic Innovations in Glaucoma Study (DIGS) and/or the African Descent and Data Evaluation Study (ADAGES) and were provided a BP monitor (Omron HeartGuide) to use at home. Baseline digital health literacy was assessed using the standardized eHEALS questionnaire. After one week, participants assessed the usability of the BP monitor and related mobile app using the Post-study System Usability Questionnaire (PSSUQ) and the System Usability Scale (SUS), standardized instruments for usability assessments in information technology. Variations in eHEALS and usability scores across demographic groups were evaluated with ANOVA. Open-ended responses about participants’ experience were analyzed thematically.

Results : Among 39 participants, the mean (standard deviation, SD) age was 66.6 (8.7) years. Two-thirds (26, 66.6%) identified as female, 11 (28.2%) as African American, and 2 (5.1%) as Hispanic/Latino. The mean (SD) eHEALS score was 31.5 (4.9), reflecting excellent self-perceived eHealth literacy. Mean (SD) usability scores were 75.9 (17.9) and 2.3 (1.9) for the SUS and PSSUQ, respectively, indicating relatively high levels of usability (70-79th percentile). However, usability scores were significantly lower among older participants (p=0.009 for SUS, p=0.02 for PSSUQ; Fig. 1). Common themes in open-ended responses included difficulty using the monitor due to lack of technological skill, the watch not fitting properly, and not knowing how to troubleshoot problems.

Conclusions : We identified challenges with using commercially available home BP monitors and mobile apps among glaucoma patients, particularly with increasing age. Glaucoma patients present unique considerations for digital health design, such as older age and visual impairment. Understanding glaucoma patients’ digital health literacy and user experience is important for inclusive design and future interventions.

This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.

 

Figure 1. Mean usability scores by age group. Higher SUS and lower PSSUQ scores reflect greater usability.

Figure 1. Mean usability scores by age group. Higher SUS and lower PSSUQ scores reflect greater usability.

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