![]() ![]() Censored: Number of censored data recorded during the time interval.Events: Number of events recorded during the time interval.At risk: Number of individuals that were at risk during the time interval.The life table displays the various results obtained from the analysis, including: Results of the life table analysis in XLSTAT Life table Random: the time when a censoring occurs is independent of the survival time.Type II: the study is continued until n events have been recorded.Progressive type I: all individuals are censored at the same date (for example, when the study terminates).Simple type I: all individuals are censored at the same time or equivalently individuals are followed during a fixed time interval.There are four different types of independent censoring: Second, the censoring must be independent: if you consider two random individuals in the study at time t-1, if one of the individuals is censored at time t, and if the other survives, then both must have equal chances to survive at time t. The life table method requires that the observations are independent. Independent censoring for life table analysis Exact censoring: when an event is reported at time t=t (i), we know that the event occurred exactly at t=t (i).Interval censoring: when an event is reported at time t=t (i), we know that the event occurred during.Right censoring: when an event is reported at time t=t (i), we know that the event occurred at t * t (i), if it ever occurred.Left censoring: when an event is reported at time t=t (i), we know that the event occurred at t * t (i).There are several types of censoring of survival data: ![]() Censoring data for life table analysis Types of censoring for life table analysis These results can later be used to model the survival curves and to predict probabilities of failure. Tests can be performed to check if the survival curves have arisen from identical survival functions. For example, it can be of interest to compare the survival times of two samples of the same product produced in two different locations. The life table method allows comparing populations, through their survival curves. The first type of data is usually called failure data, or event data, while the second is called censored data.
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