Chronic non-communicable diseases (NCDs), are the leading causes of 63% of deaths worldwide and 86% deaths in low- and middle-income countries [1]. Type-2 diabetes mellitus (T2DM) causes 1.6 million deaths worldwide [2]. Furthermore, 9.6% of the population in North America and the Caribbean is affected by it. In Central and South America, the affected population is 8.2% [3]. In Colombia, T2DM occurs in 7% to 9% of the population aged more than 20 years, and among the causes for its frequency in women is the previous diagnosis of gestational diabetes mellitus (GDM) in association with unhealthy life habits postpartum [4–7]. According to some studies, 30% of women with GDM continue experiencing glucose alterations immediately after delivery and have a risk of 9.5% to 37% of developing T2DM [8–10].

Postpartum follow-up of women with a history of GDM is essential due to their high risk of developing T2DM, a risk that increases during the first 10 years if there are no changes in the health-related lifestyle; therefore, it is necessary to educate and advise on a healthy lifestyle based on weight control, diet, and physical exercise [11–13].

The use of information technology (IT) for health education and as a complement to the usual interventions, expands the knowledge and development of healthy self-management habits, which related to multimedia elements, maintains user attention and improves the effectiveness of health education [14–16]. There are factors that determine whether multimedia elements are effective in maintaining a person’s attention and achieving the proposed objectives, such as user preferences regarding the weight of texts, the length of instructions, and the type of images [17]. Previous studies have shown the acceptance of mobile applications by health service providers for the management and prevention of GDM and the associated risk factors, achieving self-control and patient compliance with glycemic monitoring and treatment. Regarding the multimedia elements used to present educational content [18], previous research did not include users of technological devices. The study by Polinski et al. [19] took into account the satisfaction and preference of patients to receive healthcare through telehealth compared to a traditional office visit, although they did not expand on the multimedia elements used to present educational content, which was the main purpose of the present study. In the Baby Steps program, a qualitative study was made on the experience of a group of women with a diagnosis of GDM during pregnancy to assess their satisfaction with the program; the findings were used to adjust the content or presentation modes of the program [20]. The high prevalence of T2DM in women with previous GDM was our main motivation to design a mobile application that could contribute to healthy lifestyles for this specific population. The purpose was to explore the motivations for healthy lifestyles and the preferences of the multimedia elements used to present educational content about physical activity and healthy eating in a mobile application.

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Based on a qualitative approach, a comprehensive study with a hermeneutical strategy was carried out. This study collected participants’ opinions on multimedia elements used to display educational content in a mobile application, within the framework of the project. Through their responses, using a qualitative methodology, it was possible to identify their preferences regarding a mobile healthcare application. In addition, we were able to collect information on the motivations that would drive changes in their harmful habits and promote healthy lifestyles for them and their families.

The main topics addressed in this research were physical activity and proper nutrition. Based on these, three categories of analysis of the multimedia elements in the mobile application were defined. With regard to the text of the contents disclosed by the application, the questions revolved around its length and the preference between audio and text. Concerning the audio and video presentation of content, we asked the participants about their preferences regarding colors, speed of presentation, sound quality, and scenarios for physical exercise, as well as their preferences for the demonstration of physical exercises by means of graphic representations, for example, using avatars or real people (Table 1).

A non-probabilistic sample was taken from the neighborhoods of five localities (Riomar, North-Historic Center, South West, Metropolitan, and South East) into which the city of Barranquilla, Colombia is politically and administratively organized (Table 2). Through an intentional non-probability approach, some volunteers were recruited who, in turn, attracted others, bringing 50 women together to participate in the study with the aim of recruiting participants in each of the three focus groups. Finally, the participation of 32 women with a maximum of one year postpartum and with a previous diagnosis of GDM was secured. The first focus group included 10 women, and the second and third focus groups included 11 women each. Women in the postpartum stage with a previous diagnosis of gestational diabetes were selected, since until before this project there was no periodic medical control on the health condition of this population, while in pregnant women it was controlled through periodic medical visits that are specific to their state; therefore, this process became a response to the need care of the postpartum population within the framework of the New Life Generation Program, supported by the Ministry of Health and the World Diabetes Foundation.

To collect information, the focus groups were maintained until information saturation was reached; the meetings were held in Points of Timely Health Care (PASOS, for its Spanish acronym) and in the Centers for Timely Comprehensive Medical Care (CAMINOS, for its Spanish acronym), near the neighborhoods where the women resided. Previously, a home visit was made to women who met the criteria to explain the purpose of the study, invite them to form the focus groups, and arrange the dates and times of the meetings.

Each meeting lasted between 90 and 120 minutes and was facilitated by a moderator and three assistants with training in physiotherapy, nutrition, systems engineering, and psychology. Three experts in qualitative research codified the information collected and created nodes, which allowed the references to be organized to reflect the data and for the preferences expressed by the participants to be compared. For this purpose, the subcategories described in Table 1 were used. Cases were created to which the nodes were assigned in which the information collected was coded, and from there, the analysis and comparison of the preferences expressed by the women was carried out.

A structured question guide was drafted based on the appropriate literature. The questions originated from the requirements that had to be collected so that the team of system engineers could design the mobile application for the educational process. First, the motivations of the participants to take care of their health and learn healthy lifestyles were investigated. Then they were asked for their opinions about using a mobile application for the educational process and which scenarios they preferred to watch the guide videos of physical activity, the contents of the motivational messages. Finally, the potential use of the application was assessed. The questions were reviewed and tested by the research team and validated with five people, which allowed for the adaptation of the language in which the guiding questions were structured. This was done for the purposes of obtaining adequate information through interviews and guaranteeing the psychometric properties of the question guide. The focus groups guide contained the introductory and opening questions of the meetings (Table 3).

The data obtained from audio recordings of the meetings were transcribed textually, systematically, and anonymously into Microsoft Word through the program SpeechNotes—dictation notepad, a free online program to convert audio to text. The QUAGOL guide facilitated the preparation for coding and analysis of the qualitative interview data. The statistical program SPSS Statistics version 24 (IBM, Armonk, NY, USA) was used to define the frequencies of the sociodemographic characteristics, and the software NVivo 11 (QSR International, Melbourne, Australia) used for the qualitative analysis, was licensed by the Simón Bolívar University of Colombia.

Ethical considerations: The qualitative data obtained in this study was part of a macro project called Effects of an educational program mediated by mobile technologies to promote healthy lifestyles in post-pregnancy women with a previous diagnosis of gestational diabetes”. The formulation of the qualitative study was based on response to aspects that refer to behavior change for healthy lifestyles according to the Prochaska transtheoretical model [21]. The participants were required to sign an informed consent document. The study was approved by the ethics committee of the Simón Bolívar University. The study was classified as a risk-free investigation in accordance with Resolution 8340 of the Ministry of Health of Colombia.

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The study included 32 postpartum female participants, after a maximum of 1 year postpartum, who were part of the New Life Generation Program led by Fundación Vida Nueva. The average age was 27 ± 4.87 years. Most of the participants (50%) came from the South East neighborhood, followed by those who resided in the metropolitan neighborhood.

Regarding the sociodemographic characteristics of the participants, 93.75% belonged to a low socioeconomic status, and 68.75% of the women lived in a consensual union with their partners. Regarding educational level, 53.12% reported having attended high school (complete or incomplete education), followed by 28.12% who reported having completed their technical or technological training. Regarding occupation, 68.75% were housewives, followed by 18.75% who indicated that they work independently (Table 4).

The analysis of the results of the focus groups on the multimedia element categories (texts, pictures, videos, and audio) led to the following findings.

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As stated above, all of the participants had GDM during their pregnancies, and they were very young women of a low socioeconomic level. These characteristics place them in a population at risk for unhealthy lifestyles and a greater probability of suffering from NCDs; therefore, there is a need to implement accessible and attractive health interventions for a young population. The study included diversity of the sample in terms of age, and it allowed us to clarify the potential role of technology to support a healthy postpartum lifestyle in young women and young adults. There has been little research that has provided a qualitative description of people’s preferences regarding the characteristics of applications designed to promote their health and well-being.

The time between childbirth and the interviews varied among the participants; some of them had given birth more recently than others (almost 1 year). Nevertheless, we studied postpartum women for a maximum period of 1 year postpartum because it is a key time to intercede in the behaviors that have been fostered before childbirth. The findings of the study lack generalizability; they are only applicable to people with characteristics similar to those included in our study. The study included only women, which limits the knowledge of the preferences and perspectives of men.

With regard to the motivations and advantages of using a mobile application, the results agree with the findings of Lau et al. [22], who reported that the majority of women participating in their study expressed the practicality and ease of access anytime and anywhere, according to their status and their roles, the recommendation of friendly activities adapted to their needs and expectations as the main advantages of using mobile applications [23]. Stahl et al. [24] showed that mobile applications are an option for the achievement of healthy lifestyles at all ages. In that study, older people expressed the benefits of using these types of technologies in terms of organizing their life habits, promoting self-care, learning to prepare healthy foods, and especially, practicing good behaviors. According to the authors of [22], the use these tools to create programs for correct health education increased; the apps represent a social advance, and an advantage in the world of health.

The study conducted by Lau et al. [22] corresponds with the findings of the present study; the participants indicated that the platform should be easily accessible because it would stimulate and promote its more frequent use. Regarding aesthetic appeal, they considered it a determining factor in the use of the application.

Regarding the characteristics displayed, they stated that these improve the ability of women to understand their progress and acknowledge their food intake. Therefore, the visual and graphic elements must be considered in the development of an application. Furthermore, the option of using a variety multimedia elements in the intervention (short video sequences, graphs, photos, web-based questionnaires, and animation) would make an application more attractive. Therefore, the visual and graphic elements must be considered when developing an application to make it more attractive [22].

McMillan et al. [25] referred to a real interface that encourages the use of technology, which implies the speed and ease of use of the application. Brandt et al. [26] reported that most people value the ability to measure their progress and recognize their effort, which is consistent with what was expressed by the women in this study, who said that they should be able to see the progress of their tasks as they perform them. This also corresponds to the findings of McMillan et al. [25], who analyzed the various ways in which technology allows users to manage their own health, in addition to having objectives to achieve, reminders of activities to be carried out, and a reward system that encourages them to set limits on their calorie consumption. The participants in that study reported that receiving comments was a positive experience.

Dallinga et al. [27] consulted experts in technology and health sciences who emphasized that a feedback option, as well as widespread adaptation, should be integrated into an application; they suggested several feedback options, such as motivational and educational feedback. Another key element of adaptation is the flexibility of the application, that is, the ability to adjust the application and the adaptability of the application. The experts considered that people would be more willing to download an application if it was free.

In conclusion, for the design of an effective mobile application for health education, clarity is required on the fundamental needs, tastes, and preferences of potential users. The features of the technological tool should be designed in such a way that its use is motivating, characteristics related to the use of visual and auditory elements should be carefully considered in terms of the shape of their design. Preferably, texts with clear and precise information should be used. Images and videos must be accompanied by text and audio as a complement to what is seen and heard. The use of bright colors and the inclusion of icons and images that show real people is preferred. Demonstrations of physical exercises should be presented through videos of people in common places, such as home and parks.

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