What is the reference date (start date for data collection) used by?

The reference date, which serves as the starting point for data collection in cancer registries, is crucial for establishing a consistent timeline for tracking cancer incidence and patient outcomes. Both hospital registries and central registries utilize a defined reference date to standardize their processes.

In hospital registries, the reference date often aligns with the date of diagnosis or the date when the patient is first seen at that facility. This allows hospitals to accurately capture and report cases of cancer that are treated or diagnosed within their environment.

Similarly, central registries, which compile data from multiple sources including hospitals, clinics, and other healthcare facilities within a specific geographic area or jurisdiction, require a reference date to ensure that all data is comparable and collected systematically over time. This date aids in determining which cases are included in the registry and helps in conducting cancer surveillance, research, and public health strategies.

By establishing a reference date, both types of registries are able to maintain consistency in their data collection efforts, thereby enhancing the quality and reliability of cancer statistics. This commonality across hospital and central registries underscores the importance of the reference date in the overarching structure and management of cancer registry practices.