Output Overview Descriptions | Clinical | Digit Preference

Digit Preference
Running this process for Nicardipine using default settings generates the tabbed Results window shown below. Refer to the Digit Preference process description for more information. Output from the process is organized into tabs. Each tab contains one or more plots, data panels, data filters, or other elements that facilitate your analysis.
The Results window contains the following panes:
Tab Viewer
This pane provides you with a space to view individual tabs within the Results window. Use the tabs to access and view the output plots and associated data sets.
The following tabs are generated by this process:
Digit Preference Volcano Plot: Each point represents the comparison of a site to all other sites. This comparison is used to determine whether there is a difference in distribution for the last digit for a findings test with numeric data available and is done for all sites across all tests in all findings domains.
The y-axis is the -log10(Chi-Square Row Mean Score p-value), which takes advantage of the ordinality of the final digit value. This test uses standardized midrank scores in case there are gaps due to certain digit values not present. Midranks are a way of scoring the columns when the distance between levels does not necessarily have a practical interpretation. Large numbers on the y-axis indicate statistically significant results.
The x-axis is the maximum percent difference across all digits between a site versus all sites.
Values far from 0 indicate important differences between a site and the reference distribution of all other sites. An FDR (alpha=0.05) line is indicated by the dotted red line. Values above this line can be considered significant adjusting for multiple comparisons. This could identify rounding issues or other problems with how a site reports a particular test compared to other sites.
Drill Down Buttons
Drill down buttons provide you with an easy way to drill down into your data. The following drill down buttons are generated by this process:
Show Sites: Shows the rows of the data table for the selected points from the volcano plot. Use your mouse to select one or more sites of interest before clicking this button, as shown below:
Clicking Show Sites opens the following table:
Digit Bar Charts: For the points selected in the table, displays a bar chart comparing the last digit distribution between selected sites versus all others. This gives the user the ability to compare just how different each site is for a particular test. The underlying data table is available by going to Script > Data Table Window. The following chart shows the sites/tests selected above:
In this example, site 16 shows a marked preference for using reporting diastolic pressure with a terminal digit of “0”.
General
Click View Data to view the associated data table. Refer to View Data for more information.
Output includes one data set containing data of summary data for the volcano plot (named digit_vol_XXX1, by default) and one data set containing data for digit frequencies for suspect/non-suspect sites (named digit_hist_XXX, by default).
Click Reopen Dialog to reopen the completed process dialog used to generate this output.
Click Create Report to generate a standardized pdf- or rtf-formatted report containing the plots and charts of selected tabs.
Click Add Notes to take notes, and store them in a central location. Refer to Add Notes for more information.
Click View Notes to read user-generated notes. Refer to View Notes for more information.
Click Close All to close all graphics windows and underlying data sets associated with the output.

1
The _XXX designation is used to designate a one- to three-digit number that is added sequentially to prevent overwriting of existing data sets.