Exposure-adjusted Event Rates

This report screens all adverse events, tabulates the number of occurrences of each event, and calculates their incidence rates.

Click below to view a video summary of this report, or scroll down to read detailed descriptions of the report results and available options.

Methodology

Subjects are assessed for each adverse event they experience. The number of occurrences of each event is determined and used to calculate incidence rates using the following formula:

A case is considered new if a subject first develops symptoms after the start of the trial. Adverse events that occurr after a subject has recovered from a prior occurrence are considered new cases. Exposure time is typically defined as either total study time or time on treatment, depending on the selected option, unless the subject discontinues the study, an offset is specified, or a specific at risk time or event flag is specified.

Note: Records marked as not occurring (xxOCCUR = N) are excluded from this analysis.

Usage and Interpretation

The Exposure-adjusted Event Rates report was run using the Nicardipine sample data set under several scenarios to demonstrate the usage and interpretation of results.

Note: Click on the figures below to enlarge.

Example 1: Default Settings

The report was run using default the settings. Figure 1 shows a Bar Chart of the number of occurrences of each adverse event by treatment arm over the course of the study.

Figure 1:  

Displayed counts indicate the total number of occurrences of an event. Counts can include one or more occurrences per patient.

Note: You can opt to display incidence rates instead of counts for adverse events.

Tabulate

The table presents an alternate view, listing the number of occurrences of each event and the corresponding incidence rates of subjects (shown in parentheses) for each treatment arm.

Incidence rates (IR per 100PY) represent the rate of new event occurrences per 100 patient-years of exposure to the treatment drugs or placebo.

Options

Data

Term and Group Levels

Time at Risk

Patient Years Multiplier

Determine Time at Risk and Adverse Event Inclusion from:

Offset (in days) to Include with End Date Variable

Date for Ongoing Subjects

Include missing Demographic Grouping values

Stack

Snapshot Records to Include

Additional Filters - Adverse Events

Report Data Filters

Action Buttons

Action buttons provide you with an easy way to drill down into your data. The following action buttons are generated by this report:

Default Settings

Refer to Set Study Preferences for default Subject Level settings.