Cancer incidence rates for Swedish twins born between 1928 and 1965 and who both were alive at age 30 are studied by means of bivariate frailty models. Altogether, 7,280 fraternal (DZ) and 4,699 identical (MZ) twin pairs were followed up through December 31, 1995, for cancer status. The association
A Measure of Association for Bivariate Frailty Distributions
โ Scribed by Amita K. Manatunga; David Oakes
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 357 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0047-259X
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โฆ Synopsis
A general formula is derived for the variance of Kendall's coefficient of concordance for absolutely continuous bivariate distributions generated by frailties. The formula is specialized to the case of Gumbel's Type II distribution of extreme values, which arises when the frailty has a positive stable distribution. A new diagnostic is suggested for the goodness of fit of a bivariate frailty distribution, based on the value of Kendall's tau for a truncated sample. It is shown that as a function of the proportion of the sample truncated, this truncated tau characterizes the original frailty distribution. The methods are applied to some cable insulation failure data.
๐ SIMILAR VOLUMES
Bivariate failure rates and mean residual lives for nonnegative integer valued discrete variables are defined and examined for the unique determination of the underlying frequency function. As an application, a bivariate geometric distribution is obtained through a characterization approach based on