Accelerated Failure-time Models
Published Online: 15 JUL 2005
Copyright © 2005 John Wiley & Sons, Ltd
Encyclopedia of Biostatistics
How to Cite
James, I. 2005. Accelerated Failure-time Models. Encyclopedia of Biostatistics. 1.
- Published Online: 15 JUL 2005
The accelerated failure-time model assumes a survival function of the form S(t) = S0(θt), where S0 is an underlying survival function and θ may depend on a number of covariates. This is equivalent to a location-shift model for the log failure time, and in particular to a loglinear regression model when θ is loglinear. Parametric and semiparametric approaches to analyses based on these models with possibly censored failure-time responses are reviewed. The accelerated failure-time assumption is compared and contrasted with that of proportional hazards.
- accelerated failure time;
- hazard rate;
- censored data;
- EM algorithm;