- proportional hazards model
- Cox proportional hazards m.
Medical dictionary. 2011.
proportional hazards model
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Proportional hazards models — are a class of survival models in statistics. Survival models relate the time that passes before some event occurs to one or more covariates that may be associated with that quantity. In a proportional hazards model, the unique effect of a unit… … Wikipedia
Cox proportional hazards model — (koks) [David Roxbee Cox, British statistician, born 1924] see under model … Medical dictionary
Cox proportional hazards model — a method of analysis of multiple factors (variables) that influence an actuarial curve of the risk of a given negative outcome such as disease occurrence or death. A hazard rate is computed for each separate variable (e.g., among those patients… … Medical dictionary
Model selection — is the task of selecting a statistical model from a set of candidate models, given data. In the simplest cases, a pre existing set of data is considered. However, the task can also involve the design of experiments such that the data collected is … Wikipedia
Accelerated failure time model — In the statistical area of survival analysis, an accelerated failure time model (AFT model) is a parametric model that provides an alternative to the commonly used proportional hazards models. Whereas a proportional hazards model assumes that the … Wikipedia
Semiparametric model — In statistics a semiparametric model is a model that has parametric and nonparametric components.A model is a collection of distributions: {P heta: heta in Theta} indexed by a parameter heta. * A parametric model is one in which the indexing… … Wikipedia
First-hitting-time model — In statistics, first hitting time models are a sub class of survival models. The first hitting time, also called first passage time, of a set A with respect to an instance of a stochastic process is the time until the stochastic process first… … Wikipedia
General linear model — Not to be confused with generalized linear model. The general linear model (GLM) is a statistical linear model. It may be written as[1] where Y is a matrix with series of multivariate measurements, X is a matrix that might be a design matrix, B… … Wikipedia
Linear no-threshold model — The linear no threshold model (LNT) is a method for predicting the long term, biological damage caused by ionizing radiation and is based on the assumption that the risk is directly proportional to the dose at all dose levels. In other words, the … Wikipedia
Logrank test — In statistics, the logrank test is a hypothesis test to compare the survival distributions of two samples. It is a nonparametric test and appropriate to use when the data are right skewed and censored (technically, the censoring must be non… … Wikipedia
