In
actuarial science, a life table (also called a mortality table or actuarial table) is a table which shows, for a person at each age, what the probability is that they die before their next birthday. From this starting point, a number of
statistics can be derived and thus also included in the table:the probability of surviving any particular year of ageremaining
life expectancy for people at different agesthe proportion of the original birth cohort still aliveestimates of a cohort's
longevity characteristics.
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The most straightforward way to describe the survival in a sample is to compute the Life Table. The life table technique is one of the oldest methods for analyzing survival (failure time) data (e.g., Berkson & Gage, 1950; Cutler & Ederer, 1958; Gehan, 1969; see also Lawless, 1982, Lee, 1993). This table can be thought of as an "enhanced" frequency distribution table. The distribution of survival times is divided into a certain number of intervals. For each interval one can compute the number and proportion of cases or objects that entered the respective interval "alive," the number and proportion of cases that failed in the respective interval (i.e., number of terminal events, or number of cases that "died"), and the number of cases that were lost or censored in the respective interval.
Based on those numbers and proportions, several additional statistics can be computed. Refer to the
Survival Analysis chapter for additional details.
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