Required number of samples per group (radiosensitive and non-radiosensitive, respectively) to detect a significant difference between both groups (power = 80%, significance level = 5%) for a given standard deviation and effect size.

The calculations were reduced by the 2 endpoints of repairing after 15 and 60 minutes of 5Gy irradiation, since these points of time appear to need the lowest sample sizes. With regard to the standard deviation the minimal and maximal values from the original dataset for the two timeframes were selected.