Data Quality

The NICER Coordination Centre monitors regularly a number of data quality measures for the NICER database. Quality of data in cancer registration usually comprises four areas:

  • Completeness of case ascertainment

    The extent to which all of the incident cancers occurring in the population are included in the database

  • Validity

    • internal: harmonization and consistency of the data (levelling of differences in coding; prevention of double registrations; logical sequences of dates; valid combination of topography and morphology; etc.
    • external: representativeness (degree of bias) of the data
  • Accuracy

    Accuracy of detail and reporting
    (in collaboration with cancer registries)

  • Timeliness

    Indicator for the time elapsed between the date of diagnosis and the date of data release.