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Duplicate Citation Detection

When importing from multiple sources (e.g., PubMed and Scopus), the same study may appear more than once. VADRR provides a tool to identify and merge duplicate citations.

Running Duplicate Detection​

  1. In the project, go to Citations.
  2. Click Check for Duplicates.
  3. VADRR compares citations using title similarity, PMID, and DOI matching and presents a list of candidate duplicate pairs.

Reviewing Candidates​

For each candidate pair, you see both citations side by side with their metadata. Review them and decide:

  • Merge — Combine the two into one citation. VADRR keeps one record and reassigns any screening decisions or extractions from the duplicate to the survivor.
  • Not a duplicate — Dismiss the pair; VADRR will not suggest it again.

After Merging​

Once merged:

  • The duplicate citation is removed from the project.
  • Any screening decisions made on the duplicate are transferred to the surviving citation.
  • Any extractions linked to the duplicate are re-linked to the surviving citation.
warning

Merging is not reversible. Review both citations carefully before merging.