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71 lines
3.3 KiB
Markdown
71 lines
3.3 KiB
Markdown
REDCap Repeating Instrument Table Splitter
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===========================================
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Paul W. Egeler, M.S., GStat
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Spectrum Health Office of Research Administration
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13 July 2017
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## Description
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So the new buzz in the REDCap world seems to be Repeating Instruments
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and Events. Certainly there is potential for a lot of utility in this
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feature and I was excited to try it out. I know I will be using this
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feature a lot in the future.
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Unfortunately, I was not very happy with the way the data was exported
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either via CSV or API call. When you conceptualize the data model for
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a Repeating Instrument, you probably think of a multi-table model. You
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might expect that the non-repeating instruments may constitute one table
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that would be related to Repeating Instruments tables via a one-to-many
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relationship. In reality, the data is outputted as one table with all
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possible fields; this has the effect of nesting the output table in a
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way that is not useful in most analysis software. Therefore, I have made
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a solution to handle the problem in both SAS and R.
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## Supported Platforms
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- R
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- SAS
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### Coming Soon
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- Python
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- VBA
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## Instructions
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### R
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The function definition file contains [roxygen2](https://cran.r-project.org/package=roxygen2) comments to assist you.
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1. Run the function definition in the source editor or using `source()`.
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1. Download the record dataset and metadata. This can
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be accomplished either by traditional methods or using the API. The
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`read.csv()` function should be able to handle newline characters within
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records, so no pre-processing of metadata csv is needed.
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1. Call the function, pointing it to your record dataset and metadata
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`data.frame`s.
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### SAS
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1. Download the data, SAS code to load the data, and the data dictionary from REDCap
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1. Run the SAS code provided by REDCap to import the data BUT COMMENT
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THIS LINE:
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```format redcap_repeat_instrument redcap_repeat_instrument_.;```
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1. Run the RECapRITS macro definitions in the source editor or using `%include`.
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1. Run the macro call `%REDCAP_READ_DATA_DICT()` to load the data dictionry into your SAS session, pointing to the file location of your REDCap data dictionary.
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1. Run the macro call `%REDCAP_SPLIT()`. You will have an output dataset for
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your main table as well as for each repeating instrument.
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## Issues
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Suggestions and contributions are more than welcome! Please feel free to create an issue or pull request.
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## About REDCap
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This code was written for [REDCap electronic data capture tools](https://projectredcap.org/).^1^ Code for this project was tested on the REDCap instance hosted at Spectrum Health, Grand Rapids, MI. REDCap (Research Electronic Data Capture) is a secure, web-based application designed to support data capture for research studies, providing 1) an intuitive interface for validated data entry; 2) audit trails for tracking data manipulation and export procedures; 3) automated export procedures for seamless data downloads to common statistical packages; and 4) procedures for importing data from external sources.
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## References
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^1^Paul A. Harris, Robert Taylor, Robert Thielke, Jonathon Payne, Nathaniel Gonzalez, Jose G. Conde, Research electronic data capture (REDCap) – A metadata-driven methodology and workflow process for providing translational research informatics support, J Biomed Inform. 2009 Apr;42(2):377-81.
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