## 4 Results and Discussion
### Qualitative Study  
For validating the AEDMA, we perform a prototype test using a questionnaire to evaluate the main points of the proposed system. We applied a questionnaire to 26 young adults (age 15-25). This application is focused mainly on this user group, which is highly familiar with tablet or smartphone devices, and they are regular users of mobile apps. We restrict the participants of the prototype test to have an android device because we designed AEDMA specifically for this mobile OS. In Table 4, relevant information about the distribution of the testing subjects is shown.  
After testing the ADEMA by at least 1 h in the participant's device, they were asked to answer a questionnaire that contains 10 questions related to the key aspects of the AEDMA. Each question has 5 options, rated from NO, Rather NO, Do not know, Rather YES, and YES. The questions and the percentage of responses for each option are summarized in Table 5. From the obtained responses, we can summarize the following remarks:  
1. From questions 1, 3, 4, and 5, a preliminary conclusion about important points to be improved to the AEDMA can be guessed. These points are related to improving the user interface, the clarity, and legibility of presented glucose level graphs, and the ease of use of the app. Question 8 gives a general panorama showing that the mobile app in its current state can be improved. From question 9, the variability of glucose levels is adequate from the user's perspective.
2. In general, from questions 2 and 7, we can conclude that the AEDMA is useful and to give an appropriate impression to the test user, to reuse the application if a next version is released. Question 10 allows highlighting the importance of giving users an important role to involve them in the design of these types of apps.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{1}{c}{**Gender**} & \multicolumn{3}{c}{**Age**} & \multicolumn{3}{c}{**Previous Knowledge of Mobiles**} \\  & & & & **Apps for Diabetes Treatment** \\ \hline Male & Female & 15–19 & 20–25 & Yes & No \\
76.9\% & 23.1\% & 38.5\% & 61.5\% & 15.4\% & 84.6\% \\ \hline \hline \end{tabular}
\end{table}
Table 4: Relevant data of testing subjects.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{1}{c}{**Question**} & **1 (No)\%** & \begin{tabular}{c} **2 (Rather** \\ **No)\%** \\ \end{tabular} & \
\begin{tabular}{c} **3 (Do Not** \\ **Know)\%** \\ \end{tabular} &
\begin{tabular}{c} **4 (Rather** \\ **Yes)\%** \\ \end{tabular} & **5 (Yes)\%** \\ \hline \hline \multicolumn{1}{c}{(1) Are the user interface controls adequate to the type of data} & & & & \\ required by the app? & 15.4\% & 15.4\% & 15.4\% & 38.5\% & 15.4\% \\ \multicolumn{1}{c}{(2) Is the application useful?} & 23.1\% & 0\% & 0\% & 0\% & 76.9\% \\ \multicolumn{1}{c}{(3) Are the generated graphs easy to understand?} & 7.7\% & 0\% & 23.1\% & 46.2\% & 23.1\% \\ \multicolumn{1}{c}{(4) Do the application’s user interface controls allow to} & 0\% & 7.7\% & 7.7\% & 46.2\% & 38.5\% \\ \multicolumn{1}{c}{(5) How difficult has been the use of the app?} & 15.4\% & 38.5\% & 30.8\% & 15.4\% & 0\% \\ \multicolumn{1}{c}{(6) Does the application motivate to study more in depth the} & 0\% & 0\% & 15.4\% & 46.2\% & 38.5\% \\ \multicolumn{1}{c}{(7) Will you reuse the app?} & 0\% & 7.7\% & 7.7\% & 15.4\% & 69.2\% \\ \multicolumn{1}{c}{(8) Do you consider that current app can be improved?} & 7.7\% & 0\% & 0\% & 23.1\% & 69.2\% \\ \multicolumn{1}{c}{(9) Do you consider appropriate the functionality of the} & 0\% & 0\% & 7.7\% & 38.5\% & 53.8\% \\ \multicolumn{1}{c}{ application for learning the glucose levels variability?} & \multicolumn{1}{c}{(10) Do you consider the mobile application are sufficient to} & & & \\ assess whether in the future you would like to participate in} & 0\% & 0\% & 23.1\% & 38.5\% & 38.5\% \\ \multicolumn{1}{c}{similar experiences with mobile apps?} & & & & & \\ \hline \hline \end{tabular}
\end{table}
Table 5: Results of the questionnaire for the test group.