Screening Bias Volcano Plot

This section contains the following elements.

•	One Data Filter .

Enables you to subset subjects based on country of origin, study site and/or Test. Refer to Data Filter for more information.

•	One Volcano Plot .

•	Shows a volcano plot used to find records where findings change significantly between one visit and the next. Each point represents a single Findings test for a specific site. The x -axis represents the standardized mean difference, which is:

You can mouse over points of interest to see their labels or select points by dragging a mouse rectangle over them (as shown above). Selected rows are highlighted in other plots and you can also then click on various Drill Down Buttons for further analyses on those specific sites.

In this example, the one point at the upper left of the plot is selected. If you click , a subset table containing the selected row with summary statistics is generated and displayed (below).

A very large Visit 1 - Visit 2 difference (increase) has been identified for lactate dehydrogenase. However, this result is based on only 2 measurements.