Non parametric data was calculated either by Chi-Square test or Fischer exact test when relevant.

An age-adjusted sensitivity-analysis on parametric data validated those conclusions.

We have developed a method to register and display 3D parametric data, in particular radiation dose, on two-dimensional endoscopic images.

For parametric data, effect sizes were calculated as Cohen's d. For non-parametric data, ds were estimated by p-values and sample sizes according to statistical formulas.