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Apr 29

Wearable fitness tracker use in federally qualified health center patients: strategies to improve the health of all of us using digital health devices…

In an increasingly connected world, mobile devices have become ubiquitous1. Wearable devices, including fitness trackers (referred to throughout the paper as wearables and fitness trackers interchangeably), provide nearly continuous information on physical activity, heart rate, and sleep. As use increases, data are increasingly integrated into clinical and research settings. There is emerging evidence that fitness trackers can identify changes in heart rate variability, potentially identifying COVID-19 onset prior to a clinical diagnosis2. However, there is a lack of diversity in studies using wearables to study health outcomes3. Despite an increase in broadband and smartphone ownership and use across the United States, access to digital health technologies in lower-income households lags behind middle and upper-income households4. Improved access to digital infrastructure and devices in diverse communities is needed to avoid the risk of digital technologies becoming another social determinant of health5.

One of the core values of the National Institutes of Healths (NIHs) All of Us Research Program is diversity in all aspects of the program, including participants, consortium members, program staff, and researchers6. Diversity of the underlying data from participants is critical for reducing bias in precision medicine research, which aims to discover best clinical practices at the individual, not population, level. The program welcomes participants from all backgrounds and aims to reflect the rich diversity of the United States by enrolling people from communities that are historically underrepresented in biomedical research (UBR), such as racial and ethnic minority groups and those with limited access to medical care7. Recognizing the value of digital health technologies for research and health, the program launched Fitbit Bring-Your-Own-Device (BYOD), enabling participants to donate their Fitbit data to the program8. However, when All of Us Fitbit participant demographics were compared to all program participants, a reduction in diversity in race and socioeconomic status was noted9. This study was designed to reach diverse communities served by Federally Qualified Health Centers (FQHCs) to understand the gaps to participation in Fitbit BYOD.

To bridge this knowledge gap, six FQHCs that are also a part of the All of Us Consortium conducted a survey to collect patients demographic information, interest in having a fitness tracker, and other factors potentially associated with this interest. Descriptive statistics, univariate and multivariate logistic regression, and qualitative assessment of free-text responses were used to analyze the results (see Methods for details; see Supplementary Fig. 1 for a map of participating FQHC sites).

Of the 1007 adults surveyed, 39% identified as Hispanic, 36% as non-Hispanic Black or African American, and 15% as non-Hispanic White (Fig. 1). Almost three-quarters identified as cis-gender women (71%), 14% had less than a 9th-grade education while 45% had completed high school, and participants were evenly divided across age groups. The surveys were administered in English (68%) and Spanish (32%). The primary outcome was whether participants would like a fitness tracker, and overall 58% responded yes, 20% no, and 23% did not answer (Fig. 1).

Tables show the race/ethnicity, education, age, and sex/gender characteristics of the survey respondents. Pie charts compare the education levels and race/ethnicity of the survey respondents to All of Us Research Program participants. Some All of Us participants are FQHC patients and may have taken part in this survey, but not all survey respondents are enrolled in All of Us.

Participants were asked a variety of questions about their exposure to, ownership of, interest in, and familiarity with fitness trackers. Figure 2 displays participants ownership rate and interest in fitness trackers. Participants were asked about barriers to owning a fitness tracker. These Hindering factors include cost, a general awareness of fitness trackers, and specific information about how they can provide health insights, language, and assistance over the phone vs fully digital methods. Respondents were also asked about helpful factors for using fitness trackers, combined under Helping factors as recommendations for potential methods to mitigate disparities in digital health technology use. These include an interest in having a device and learning about how fitness trackers can be used to track health, a willingness to share data for research, owning a smartphone and knowledge of how to download and use apps, and an interest in learning more.

Participants were asked a variety of questions centered around their exposure to, ownership of, interest in, and familiarity with fitness trackers. The top two pie charts illustrate participants ownership and interest in fitness trackers. Participants were also asked what kinds of things get in the way of owning a fitness tracker. Those items were distilled and are listed under Hindering factors. Respondents were also asked about factors that they may consider helpful in reducing barriers to using a fitness tracker, combined under Helping factors as recommendations for potential methods to mitigate disparities in digital health technology use.

A number of factors were associated with would you like a fitness tracker at the 0.05 significance level using two-sided tests (Table 1). Participants who responded they would like a fitness tracker had higher odds in univariate logistic regression models of identifying as a cis woman (odds ratio (OR)=2.13, 95% CI:1.503.04, P<0.001), being a participant from the Cooperative Health FQHC (OR=3.13, 95% CI:1.695.86, P<0.001), having a smartphone (OR=2.02, 95% CI:1.362.97, P<0.001) and knowing what a fitness tracker is before taking the survey (OR=1.79, 95% CI:1.292.49, P<0.001). In the multivariate logistic regression model, participants who would like a fitness tracker were more likely to be among the 4655 and 5665 age groups and identified as non-Hispanic Black or African American. Participants who had a smartphone at the time of the survey and knew what a fitness tracker was before the survey were also more likely to want a fitness tracker. Not having a fitness tracker because they are too expensive and do not understand how it can help participants, but want to learn were also associated with answering yes to, would you like to use a fitness tracker? Not having a fitness tracker because they are not helpful or do not want to commit to using it every day were associated with answering no. These factors, including education and training on the value of these devices, could be considered when designing research studies and programs to improve digital health equity.

Results from a qualitative content analysis were consistent with the quantitative findings. The top three themes were no interest, lack of knowledge, and lost/broken device. Over half of the qualitative responses to why do not you have a fitness tracker were coded as No Interest (52%, e.g.,: Ive never thought of having one, never considered it). This may also be a result of limited awareness or knowledge of potential health impacts. Other common responses fell under the theme of lack of knowledge (18%, e.g.,: didnt know what they were). While cost was not identified as a main theme among the open-ended questions, lost/broken device was prevalent, suggesting that cost may be a barrier to replacing a previously owned device. Our findings suggest that widespread adoption and use of digital health devices are possible across diverse communities, but would require a high-touch approach, including educational materials and public or private financial investment in devices. Limitations of the study include the surveyed patient sample may not be fully representative of the patient population of the six FQHCs, and the lack of a second parallel reviewer in the qualitative analysis.

The majority of patients surveyed are interested in using digital health devices and learning how these devices could improve health. However, cost and understanding how they work are important barriers that could prevent individuals from realizing the benefits of wearable digital health devices such as fitness trackers (Fig. 2). Consideration of cultural nuances are also important, for example with the terminology used to name these devices. In the course of this study, we learned that many Spanish-speaking participants were concerned that these devices could be used to track their movements, because of the word trackers. With the increase in telehealth and telemedicine use due to the COVID pandemic, access to digital health technologies is increasingly important. However, as the use of digital technology expands into health care, careful consideration is required to ensure that existing health equity gaps are not exacerbated and additional health equity gaps are not created.

While studies have been conducted on the use of wearables, very few have specifically sought input from UBR populations. In this study, patients were given the option to complete the survey in English or Spanish; one-third completed in Spanish. A Pew Research study10 found 21% of Americans use smartwatches or wearable fitness trackers. Use was greater for those with a higher annual household income and those identifying as white and/or non-Hispanic. More than 65% of the Pew survey participants identified as white and had an annual household income greater than $30K per year. In contrast, over 70% of participants in our survey do not identify as white (36% identify as Black or African American compared to 10% in the Pew study, and 39% identify as Hispanic compared to 14% in the Pew study). Based on health center data, 90% of the patients at our recruitment centers have an annual income at or below 200% of the Federal Poverty Guideline. Data collected from FQHC All of Us participants indicate that 38.3% have an annual income of less than $10K, 23.9% have incomes between $10 and $25K, and 7.9% between $25 and $35K, with 21.7% preferring not to answer. Our results align with recent findings by Tappen et al11, where significant differences in computer ownership, internet access, and use of digital health information were observed among older racial and ethnic minority individuals when compared to white adults of similar ages. Older age, lower education, lower-income, and minority racial and ethnicity identification predicted limited digital health information use11.

Wearables are evolving to monitor more specific health concerns, including diabetes and heart disease, two conditions that are prevalent in African American and Hispanic communities. Inclusive use of digital health technologies in research and clinical practice will likely require strategic planning for devices, infrastructure, and education about digital health technologies. Most individuals surveyed have smartphones and know how to install apps, but would benefit from additional information on how fitness trackers can be used to improve health. Since the cost of a device was one of the most hindering factors noted in the survey, investment is needed to help overcome this barrier to entry. There is a risk of increasing health disparities through noninclusion in research and clinical care using wearables and other digital health devices; the diverse participants in this study indicated interest in fitness trackers, but barriers such as cost and education exist. Future research to understand potential health disparities and inequity could investigate other evidence-based digital health solutions and real-world data beyond fitness trackers. The All of Us program is committed to engaging with diverse communities and building relationships with community leaders in order to gain trust, but is only one research program. The results of this survey suggest that additional investment in devices and educational materials from other clinical and research programs could contribute toward reducing disparities.

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Wearable fitness tracker use in federally qualified health center patients: strategies to improve the health of all of us using digital health devices...

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