  Graphs are very effective tools in visualizing information and are used in
many fields including the medical field. In most developing countries primary
care, graphs are used to monitor child growth. These measures are therefore
often displayed using line graphs, basing it on three indicators (stunting,
underweight and wasting) based on the WHO 2006 Child Growth Standard. Most
literature on information visualization of electronic health record data
focuses on aggregate data visualization tools. This research therefore, was set
out to provide such an overview of requirements for computerized graphs for
individual patient data, implemented in a way that all kinds of medical graphs
showing the development of medical measures over time can be displayed. This
research was interpretive, using a user-centric approach for data collection
where interviews and web search was used to ensure that the graphs developed
are fit the user requirements. This followed prototype development using one of
the three free, open source software libraries for Android that were evaluated.
The prototype was then used to refine the user requirements. The health workers
interpreted the graphs developed flawlessly.
