An observation is said to be censored in time when the event of interest cannot be observed at the time at which the analysis is
conducted. Special cases are right censoring when the observation has not yet been observed at the time of the analysis, left censoring when the observation occurred sometime before the observation period began, and interval censoring when the observation’s time of occurrence has been recorded as within a time interval.
Source: (CIOMS X: Meta-analysis 2016)
