Related Experiment Video
Updated: Oct 4, 2026

Measurement of Lifespan in Drosophila melanogaster
Published on: January 7, 2013
Testing equality of survival functions of quality-adjusted lifetime
1Department of Statistics, North Carolina State University, Raleigh, 27695, USA. zhao@bst.rochester.edu
Abstract:
We present a method for comparing the survival functions of quality-adjusted lifetime from two treatments. This test statistic becomes the ordinary log-rank test when quality-adjusted lifetime is the same as the survival time. Simulation experiments are conducted to examine the behavior of our proposed test statistic under both null and alternative hypotheses. In addition, we apply our method to a breast cancer trial for comparing the distribution of quality-adjusted lifetime between two treatment regimes.
Related Concept Videos
Comparing the Survival Analysis of Two or More Groups
Survival Curves
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
Life Tables
Kaplan-Meier Approach
Assumptions of Survival Analysis
Introduction To Survival Analysis
The primary goal of survival analysis is to estimate survival time—the time until a...

