In 2003, an SQL database was created that contains information regarding consumer calls to CAPHIS.
In 2008, Preston Medical Library began research using its CAPHIS data and Esri's ArcMap software.
Findings from this research indicate that although there is no apparent correlation between rates of calls and counties with higher mortality of a specific disease, the overall rates of calls to the CAPHIS match the ranking of the leading causes of death in Tennessee.
Once the calculations were performed, we were able to join layers of information and produce a visual representation of the 2-year rate of calls to the CAPHIS from Knox County throughout the state (Figure 1, online only).
The resulting maps establish a visual representation of the rate of calls to CAPHIS by zip code and the selected socioeconomic factors.
Results indicate that, for the time period examined, there were zip codes in Knox County and neighboring counties that had a high prevalence people of who were aged sixty or older (Figure 2, online only), who were poor (Figure 3, online only), or who had an ambulatory disability (Figure 4) who were not using Preston's CAPHIS.
Mapping the rate of individuals aged 60 and older showed the highest rates of individuals clustered in 6 counties, 3 of which were contiguous and 4 of which had not placed any calls to CAPHIS in the study period (Figure 2, online only).