[EpiData-list] about: Lifetable in v2.1

epidata-list at lists.umanitoba.ca epidata-list at lists.umanitoba.ca
Sun Nov 2 11:22:17 CST 2008

B.Branger questioned whether the lifetable is "actuarial" or "Kaplan-Meier" principle.
The principle is to calculate changes in survival probabilities at each date, 
where a change happens - either censoring or case status. In actuarial calculations there would be an 
aggregation to say half year, month or similar. Therefore if you DO NOT use the /i for "Interval" the calculation 
will be "Kaplan-Meier" technique. If you found an example where this is not the case let us know.

Jens Lauritsen
EpiData Association

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