Nonidentifiability of competing risks |
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Authors: | David M Rose |
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Institution: | Energy Technology Applications Division, Boeing Computer Services Company, Seattle, Washington, U.S.A. |
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Abstract: | Frequently one is interested in examining the survival experience of a set of individuals exposed to k risks. If W is the time of failure for the individual and J is the indicator variable for cause of death, then the competing risk framework assumes that W = min Xi and J = j if Xj is the minimum, where the Xi's are the survival lifetimes when only risk Ri is operating on the population. To examine the underlying structure of the survival experience one has to know the joint distribution of the . It is shown here that if only W and J are observed, the joint distribution of the is nonidentifiable. |
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