A clinical investigator terminated a Phase IV drug study. In accordance with the ICH GCP Guidelines, which of the following documents should the clinical investigator maintain?
Upon study closure, investigators must maintain documentation that allows subject data to be linked back if necessary. The Subject Identification Code List is a key essential document for ensuring traceability while maintaining confidentiality.
ICH E6(R2) 8.3.21: ''Subject Identification Code List --- A list of all subjects randomized to trial numbers, allowing investigator to identify each subject in case follow-up is required. This list should be kept in a confidential manner and retained for the maximum retention period.''
ICH E6(R2) 8.4: Essential documents for investigators include items needed for subject identification, protocol compliance, and trial closure.
Other listed documents (randomization list, monitoring report, audit certificate) are maintained by the sponsor, not the investigator. The subject code list ensures that in the event of a safety issue, regulatory authority queries, or subject withdrawal, the investigator can trace back records.
Thus, the correct answer is B (Completed Subject Identification Code List).
ICH E6(R2), 8.3.21 (Essential documents: Subject identification code list).
ICH E6(R2), 8.4 (Essential documents for trial closure).
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