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To investigate the pattern of risk over the first year of life, instantaneous hazards of failure based on the Kaplan-Meier survival function were used.
The association of various factors with the hazards of failure for the time-to-endpoint PFS was estimated using the Cox proportional hazard regression model.
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An inexperienced operator significantly increased the hazard of failure.
We can conclude that serum bilirubin has some additional effect on the hazard of failure.
Also, intuitively bilirubin has some additional effect on the hazard of failure and we would like to use that information efficiently.
In addition, it is required in Zhou and Wang (2000) that, conditional on X, the auxiliary variable W provides no additional information on the the hazard of failure.
The proposed method allows W to be multivariate and to be informative in the sense that, conditional X, it may provide additional information on the hazard of failure.
Secondly, it requires that, conditionally on X, W provides no additional information about the hazard of failure; that is, all of the effects of W on failure and censoring are mediated through X, which is somewhat restricted since W may not be a true surrogate and depends on the failure given X.
Reviewing the evidence, Crow [14], [15] suggested that the genetic variance associated with the evolutionary development, in Homo sapiens, of dominance for a component of language in one hemisphere carries with it the hazard of failure manifest as the symptoms of schizophrenia.
The overall failure rate was expressed as hazard of failure per person-year of follow-up.
The hazard of failure is specified by the multiplicative model (1) where x2 i (t) are a set of explanatory variables with associated fixed effect parameters β2.
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CEO of Professional Science Editing for Scientists @ prosciediting.com