observasjonstiden
Observasjonstiden, or observation time, is the duration during which data are collected on a subject, unit, or object in a study. It can refer to the period from when a participant enters the study until the end of follow-up, or to the time during which a unit is considered at risk and under observation. The concept is central in many research designs, especially longitudinal studies, cohort studies and clinical trials.
In epidemiology and clinical research, observasjonstiden is used to calculate rates that depend on time, such
In clinical trials, observasjonstiden is crucial for time-to-event analyses, such as survival analysis, where the timing
Outside medicine, observation time can also refer to the amount of telescope or instrument time allocated for