Visit-level data fields are designed to record clinical details that can change over time. Each visit has its own unique characteristics, such as date, site at which the visit occurred, clinical diagnoses and clinical status.
Planned longitudinal studies are usually pre-programmed with expected time points or visit descriptions based upon each study’s unique design. Each ‘Visit’ is pre-programmed with the expected primary specimens to be collected by the study coordinator and, in some cases, the processed specimens derived from the primary samples. Therefore the visit descriptions and specimens will differ for every protocol.
Specimen and visit level data can be collected in a single step or in two steps. The single step process bypasses the visit page where detailed clinical data is recorded. The two-step process allows you to record clinical information about the patient at each visit prior to recording sample collection.
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