Journal
CLINICAL CANCER RESEARCH
Volume 16, Issue 20, Pages 4912-4913Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1078-0432.CCR-10-1540
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Here, I describe a statistic for comparing two survival curves that has a clear and obvious meaning and has a long history in biostatistics. Suppose we are comparing survival times associated with two treatments A and B. The statistic operates in such a way that if it takes on the value 0.95, then the interpretation is that a randomly chosen patient treated with A has a 95% chance of surviving longer than a randomly chosen patient treated with B. This statistic was first described in the 1950s, and was generalized in the 1960s to work with right-censored survival times. It is a useful and convenient measure for assessing differences between survival curves. Software for computing the statistic is readily available on the Internet. Clin Cancer Res; 16( 20); 4912-3. (C) 2010 AACR.
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