This report displays shift plots to compare test measurements for a specified findings domain at baseline versus on-therapy values and performs a
matched pairs analysis on average score during baseline and a summary score during the trial. A separate analysis is done for each findings measurement.
Running Findings Shift Plots for
Nicardipine using default settings generates the report shown below.
These plots show how findings levels change from baseline values as a result of treatment. Blue points represent patients treated with nicardipine.
Red points represent patients receiving the placebo. The approximately square spread of points (with a diagonal line splitting approximately even across it) indicates similar variability of measurements before and after treatment, although the placebo group appears to have greater variability in both cases compared to the treatment group (due to outliers).
Tip: You can select table cells to view the corresponding subjects and their locations in the respective shift and matched pairs plots.
All tables are associated with the Local Data Filter (located on the
right side). You can use this filter to subset the tables based on
variable filters. You can select cells of these tables (either counts or percents) to select the corresponding rows in the data table.
Each Matched Pairs Analysis Plot set compares the different treatment groups for each finding.
Blue dots (
left) represent patients treated with nicardipine.
Red dots (
right) represent patients treated with the placebo. In the example shown above, nicardipine appears to have little effect on individual potassium level or variation of potassium level between patients.
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Profile Subjects: Select subjects and click to generate the patient profiles for subjects experiencing selected events. See Profile Subjects for additional information.
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Show Subjects: Select subjects and click to open the ADSL (or DM if ADSL is unavailable) of selected subjects for subjects experiencing selected events.
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Cluster Subjects: Select subjects and click to cluster subjects experiencing selected events based on available covariates. See Cluster Subjects for additional information.
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AE Narrative: Select subjects and click to open the AE Narrative generator.
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Demographic Counts: Select subjects and click to create a data set of USUBJIDs for subjects experiencing selected events, which subsets all subsequently run reports to those selected subjects. The currently available filter data set can be applied by selecting Apply Subject Filter in any report dialog.
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Click the Options arrow to reopen the completed dialog used to generate this output.
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Use the Findings Domain to Analyze option to specify whether to plot the distribution of measurements from either the Electrocardiogram (
EG), Laboratory (
LB), or Vital Signs (
VS) findings domains. LB is selected by default.
You can use the Findings Domain Tests for Analysis option to plot the distributions of one or more selected findings tests. Leaving the field blank (the default selection) plots the distributions for all available findings tests.
Available variables include Planned, which is selected when the treatments patients received exactly match what was planned and
Actual, which is selected when treatment deviates from what was planned.
You can also specify a variable other than the ARM or
TRTxxP (planned treatment) or
ACTARM or
TRTxxA (actual treatment) from the CDISC models as a surrogate variable to serve as a comparator. Finally, you can select
None to plot the data without segregating it by a treatment variable.
Use the Summary Statistic for Trial Data option to specify whether to display the mean, median, maximum, minimum, or last values to summarize the results of the trial period.
Selecting LLN normalizes the data to the lower limit of the expected normal range and is best used when you expect the values to fall below the normal. Normalized values less than one are considered to be lower than normal.
Selecting ULN normalizes the data to the upper limit of the expected normal range and is best used when you expect the values to exceed the normal range. Normalized values greater than one are considered to be higher than normal.
Selecting Geometric normalizes the data such that the lower limit of the expected normal range is set to -1 and the upper limit of the expected normal range is set to +1. This method is best used when there is no expectations of where the values might fall. Normalized values less than -1 are considered to be lower than normal while values greater that +1 are higher than normal.
Note: These options are available only when
LB is the specified domain.
If there is a supplemental domain (SUPPXX) associated with your study, you can opt to merge the non-standard data contained therein into your data.
By default, time is measured by visits. However, you can change the Time Scale to measure time in either weeks or days. This option is useful for assessing report graphics for exceptionally long studies.
To establish a baseline measurement for each finding, you must specify the time period (usually prior to day one of the study) and whether to use on or more than one measurement. Use the Baseline Time Window option to specify the time period during which baseline measurements are taken and the
Calculate baseline as: option to use the last pre-dose measurement or the mean of all the measurements taken during the baseline time window as the baseline measurement.
When the Display symmetrical axes for Shift Plots option is checked, the axes on the resulting shift plots are adjusted to make the scale between the minimum and maximum the same. This results in a symmetrical plot for each finding in which the line indicating no change between baseline and trial values has a slope of 45°.
Use the Display shift tables of Baseline versus Trial laboratory measurement elevations option to compute and display tables of subject counts and percentages (per treatment group) of laboratory elevations in reference to the upper limit of normal for measurements taken at baseline versus trial summary measurements. This table can be interpreted as a categorized representation of the shift from baseline. This option is specified by default.
Use the Display shift tables by Treatment Variable values to create separate lab elevations cross-tabulation tables by Treatment groups. This option is specified by default.
Use the Include aggregate subject count and percentages for shift table categories to include the aggregated sum of subjects that falls in each of the cross-tabulation categories based on laboratory elevations from baseline vs. trial in the shift tables.
The Perform Matched-Pairs analysis of Baseline versus Trial measurements for each treatment group option enables you to perform a matched-pairs statistical analysis for each treatment group comparing the differences between baseline values and trial measurements. The resulting graphics are split out for each treatment group and show a rotated shift plot with tests and associated statistics for the mean difference of Trial versus Baseline findings results.