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REDCap saves the raw value (also called the choice number: 1,2,3,4), not the label, when saving the data for a field. That means if you change the label, or renumber labels, you can profoundly change the meaning of an answer for all existing records. Do not change a raw value/label pair in...

If a question, or set of questions, will not be used in the future, it is generally better to hide the question(s), rather than delete them. If the question is deleted, that also deletes that data from all existing records. A better method is to hide legacy question(s). There are several methods...

REDCap projects in production can be edited but the process is slightly different from editing in development mode. When in production, the user must first enter Draft Mode by clicking the "Enter Draft Mode" button at the top of the Designer page to start making changes. Changes made in Draft Mode...

Deleting a record should not be undertaken lightly. It may require notification of the IRB or PI, depending on the situation. Best practice guidelines are to document the record id, what is being deleted and the reason for the delete in a Word document, which can be uploaded to the project's File...

Calculations in REDCap are generally performed only when a form containing the calculation (whether a calculated field, a @CALCDATE or @CALCTEXT) is opened for that record. Use Rule H to update the calculations in all records without you having to open each record individually. This is important...

A critical issue is a change to your project that will cause data to be deleted or radically altered. This includes deleting a field or incorrectly editing a field. In this example, a user made the following edit when trying to add the "Mocha" option to a question that asked about a favorite ice...

Development vs. Production The REDcap application assumes that any data entered in development mode is test data. While in development mode, REDCap does NOT track changes to a project's design and will suppress all warning messages related to data that is about to be lost. This is actually preferred...

Sometimes it is necessary to hide one or more of the possible answers (also known as "retire a choice" or "retire an option"). This prevents an answer from being used in the future, but does not delete it from existing records. To do this, add @HIDECHOICE= ' n' in the Action Tags box, where n is the...

Note: Text below originates from the REDCap Help & FAQ text: Action Tags are special terms that begin with the '@' sign that can be placed inside a field's Field Annotation. Each action tag has a corresponding action that is performed for the field when displayed on data entry forms and survey pages...