What is the purpose of the subject identification code list?

• A. To reveal patient identities to all study staff
• B. To permit identification of all enrolled subjects for follow-up while keeping confidential
• C. To be used for marketing purposes
• D. To track participants' family medical history

Answer: (B)

The main idea is to protect participant privacy while still allowing data to be linked and follow-up to occur. A subject identification code list assigns a coded ID to each enrolled participant and keeps the mapping between that code and the person’s actual identity in a separate, secured file. Access to this key is restricted to authorized personnel only. This setup lets the study team re-contact participants for follow-up, confirm data, or report safety events without exposing personal identifiers to everyone on the study team. It’s not used to reveal identities broadly, for marketing, or to track a participant’s family medical history.