Identifiability of Bivariate Survival Curves from Censored Data
作者:
RonaldC. Pruitt,
期刊:
Journal of the American Statistical Association
(Taylor Available online 1993)
卷期:
Volume 88,
issue 422
页码: 573-579
ISSN:0162-1459
年代: 1993
DOI:10.1080/01621459.1993.10476309
出版商: Taylor & Francis Group
关键词: Conditional independence;Mutual independence
数据来源: Taylor
摘要:
We show that the survival curve is identifiable in bivariate censored data problems under weaker independence assumptions than have commonly been made. The common assumption has been mutual independence of (T1,T2) and (Z1,Z2), where (T1,T2) is the true survival vector, (Z1,Z2) is a nuisance censoring vector, and bivariate right-censored data is observed. We show that the distribution of (T1,T2) is identifiable under weaker, conditional independence assumptions for distributions with full support. Bivariate survival analysis is a more powerful analysis tool than univariate analysis if multiple, possibly related, times are of interest. The mutual independence model has become popular as a nonparametric way of analyzing such data. Analysis of the bivariate problem and analogy with univariate models are used to show that the conditional independence model is more widely applicable as a general nonparametric model for bivariate survival data.
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