What best describes record linkage in registry operations?

• A. A method to bind two records from different datasets that refer to the same patient
• B. A data visualization technique
• C. A backup strategy
• D. A data entry interface

Answer: (A)

Record linkage in registry operations is the process of identifying and merging records that refer to the same individual across different data sources to create a single, patient-centered record. This allows a cancer registry to track a patient’s full history even when data come from multiple hospitals, laboratories, or vital statistics systems, eliminates duplicates, and improves data completeness and accuracy for incidence, treatment, and outcomes analyses. The best description highlights binding two records from different datasets that refer to the same patient, because the core idea is tying together information about the same person from separate sources rather than performing data visualization, backup, or data entry tasks. In practice, linkage uses deterministic matching on exact identifiers when available and probabilistic matching to handle partial or noisy data, with attention to data quality, standardization, and privacy considerations. This enables longitudinal tracking and more reliable epidemiologic analyses.