Disambiguation: Clinical data validation means checking clinical data for correctness and completeness. Clinical database validation is making sure that clinical databases perform the functions required by regulations and guidances and is on another page.1  More information on the disambiguation.2  Back to introduction to clinical data management.ore specifically, validation is usually concerned with checking four of the eight characteristics of good clinical data â these characteristics are from the first guidance and the first other reference listed below. The eight characteristics are: 1  Attributable: The sources of the data are known and recorded.