MRCT – Research that uses already existing data. https://mrctcenter.org/glossaryterm/retrospective-study/
CDISC-Gloss – A study with planned observations collected predominantly before the study starts (i.e. backward-looking). Note: Examples are case-control studies or retrospective cohort studies when the observations from the selected subjects occurred before the study started. [after ClinicalTrials.gov] See also prospective study, observational study, adaptive design, clinical study.