Which of the following groups of data accuracy is required according to the Cancer Registry Quality Control Plan?

The required groups of data accuracy according to the Cancer Registry Quality Control Plan emphasize the importance of specific data elements essential for cancer registries to ensure high-quality data collection and reporting.

The combination of class of case, primary site, and histology is critical for several reasons. Class of case helps classify whether a case is newly diagnosed, recurring, or an in situ cancer, and this is vital for analyzing patient outcomes and treatment effectiveness. The primary site refers to the original location of the tumor and is crucial for staging and treatment planning. Histology, which refers to the microscopic composition of tumor cells, is also significant for defining the type of cancer and guiding appropriate therapies.

These data elements are essential for ensuring accurate incidence rates, facilitating research, and assisting in epidemiological studies. Accurate collection and maintenance of this information allow for better tracking of cancer trends and outcomes. Therefore, focusing on this specific combination supports the goals of a cancer registry in maintaining high-quality data for improved public health outcomes in cancer management and research.