Research Activity
longitudinal studies
[ lon-ji-tood-n-l, -tyood- stuhd-eez ]
Subclass of:
Cohort Studies
Definitions related to longitudinal studies:
  • (prospective) Studies that look forward using periodic observations collected predominantly following subject enrollment. (clinicaltrials.gov)
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • (prospective) In medicine, a study or clinical trial in which participants are identified and then followed forward in time.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • (longitudinal study) A study in which participants are followed and repeatedly evaluated over a period of time.
    NCI
    U.S. National Cancer Institute, 2021
  • (longitudinal study) Investigation in which data are collected from a number of subjects over a long period of time (a well-known example is the Framingham study).
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • Studies in which variables relating to an individual or group of individuals are assessed over a period of time.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.