Quantitative Variable Distributions: Multi Site, Exploratory, Longitudinal Analysis
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Abstract
This check provides raw data and visualizations to aid a user in evaluating whether the distribution of quantitative variables aligns with clinical expectations. It can summarize the distribution of a quantitative variable (like lab result values) or patient counts (like number of patients with an outpatient visit).
How to Access This Check
- You may access the module’s R package in GitHub.
Or, run in R
install_github('ssdqa/https://github.com/ssdqa/quantvariabledistribution')
- Using the provided vignettes on GitHub or help in R, follow parameter input instructions for “Multi Site”, “Exploratory”, “Longitudinal” requirements.
Check Output
Visualization Output
This check outputs a line graph displaying the user-specified summary statistic of each value type across the time span. Each line represents the distribution of the statistic at each site included in the analysis across the time span.
Raw Output
This check produces a raw data output containing 12 columns:
| Column | Data Type | Definition |
|---|---|---|
site |
character | the name of the site being targeted OR “combined” if multiple sites were provided |
time_start |
date | the start of the time period being examined |
time_increment |
character | the length of each time period |
value_col |
numeric | the quantitative value of the variable of interest |
value_freq |
numeric | the frequency with which the quantitative value occurs |
value_type |
character | the type of value being measured |
mean_val |
numeric | the mean of value_col |
median_val |
numeric | the median of value_col |
sd_val |
numeric | the standard deviation of value_col |
q1_val |
numeric | the first quantile of value_col |
q3_val |
numeric | the third quantile of value_col |
output_function |
character | a string indicating the type of visualization that should be generated by qvd_output |
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This research was made possible through the generous support of the Patient-Centered Outcomes Research Institute .
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Except where otherwised noted, this item's license is described as a CC-BY Attribution 4.0 license.