This documentation is created by Tashrif Billah for referring AMP-SCZ collaborators about how to make an NDA-format dictionary definition. The latter has to be sent to ndahelp@mail.nih.gov to create the actual data dictionary. Copy the and start editing it according to the following instructions:
Must be less than 30 characters. It could be identical to REDCap variable name. If a REDCap variable does not exist, make up a proper name.
- String
- Date
- Integer
- Float
It is valid only for String DataType. It is okay to provide an overestimate for the number of characters.
Unless required, keep this as Recommended whenever possible.
Put a one liner describing the ElementName
It is the most important field. An underestimate will result in data submission error. If your value range is mathematically established, put exact numbers such as 0::100. If it is not mathematically established, put overestimates on both lower and upper limits. If you are not comfortable putting a range, keep it empty. Include -300, -900 for Integer and Float types e.g. 0::100; -300; -900. Multiple ranges, separated by semicolon, can be written in one cell.
If necessary, put any additional note beside ElementDescription. Keep empty otherwise.
Keep it empty. NDA database team will populate this cell if necessary.
(i) No need to enclose a string with double quotes unless you have space, comma, or semicolon in that string.