Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)
- Volume 2 Issue 2
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- Pages.121-133
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- 2002
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- 1738-9895(pISSN)
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- 2733-8320(eISSN)
Effects of Informative Censoring in the Proportional Hazards Model
비례위험모형에서 정보적 중도절단의 효과
Abstract
This paper concerns informative censoring and some of the difficulties it creates in analysis of survival data. For analyzing censored data, misclassification of informative censoring into random censoring is often unavoidable. It is worthwhile to investigate the impact of neglecting informative censoring on the estimation of the parameters of the proportional hazards model. The proposed model includes a primary failure which can be censored informatively or randomly and a followup failure which may be censored randomly. Simulation shows that the loss is about 30% with regard to the confidence interval if we neglect the informative censoring.
Keywords
- proportional hazard model;
- random censored;
- informative censored;
- martingales;
- counting process;
- partial likelihood