In REDCap, what is a longitudinal project?

In REDCap, a longitudinal project is similar to a traditional data collection project in that multiple data entry forms are defined. However, unlike the traditional model, forms in a longitudinal project can be completed repeatedly for a single record. The longitudinal model allows any data entry page to be repeated any number of times across predefined time-points specified by the user before data is collected.

Therefore, instead of repeating a data entry form multiple times in the Data Dictionary, you can have one longitudinal project that is repeated N number of times.

A longitudinal project lets you define events that allow data collection forms to be used multiple times for any given database record. An event may be a temporal event in the course of your project, such as a participant visit, or a task to be performed. After you have defined events, you must designate the data entry forms for any or all events, thereby enabling the use of one form for multiple events in the same database record.

You can group your events into arms; your project may have one or more arms. Each arm can have as many events as you wish. You can use the table provided to create new events and/or arms, or modify existing ones. (One arm and one event is the initial default for all databases).

Longitudinal projects are most commonly used for collecting clinical and research data.

If you have questions about REDCap, or need help setting up or managing a REDCap project, email Indiana CTSI support.

This is document bdic in the Knowledge Base.
Last modified on 2015-08-20 00:00:00.

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