Question

I’m designing a database for capturing clinical trial data. The data are entered twice by two persons, independently and the results must be matched. What are the best database tools to use to achieve the best results. Any one has similar experiences?

Your helps are highly appreciated.

thanks.

Answer 1

Are you designing a database, or the app to enter data into the database?

If you are simply looking at the database, I would capture the following information:

1) user A item X entered data
2) user A userID
3) user A intem X entered date/time

4) user B item X entered data
5) user B userID
6) user B intem X entered date/time

I’d then conclude that there was something called a “Datapoint” that contained the fields

-- entering userID
-- entry date
-- entry data (double value)
I'd also assign it a unique ID for the entry
--entryID (autoinc)

I would then state that there is something called a “data trial” that has two of these things called “data entries”

If I believed that this number of entries per data trial might be 3 verifications instead of 2, I might change my design, but initially I would give my “Data Trial” the following definition:

-- data trial name
-- data trial creation date
-- user creating data trial (userID)
-- data entry 1 (dataPointID)
-- data entry 2 (dataPointID)
-- entries verified (boolean)
and give each of these a unique ID also
-- data trial ID (autoinc)