The equation for the standard error of the mean is the sample standard deviation divided by the square root of the sample size.

Also available formulae may often substantially overestimate standard errors of relative survival rates (Brenner and Hakulinen, 2005).

We evaluated the relative contributions of sampling error (randomly chosen standard errors applied as 0-30% of parameter estimates) in initial population size and ...

We analyzed data from the Breast Cancer Detection Demonstration Project (BCDDP) to obtain multivariate relative hazard models for breast cancer that included mammographic density (MD) in addition to ...