Margriet Kwint

Chapter 6 122 ▲ Figure 1: Average esophageal dose-volume-histogram for the historical patients planned with conformal radiotherapy, and the current IMRT-dataset. The error bars denote the 95% standard error. Both groups were compared for each dose level using a 2-sided students T-test (*p<0.05, **p<0.01, ***p<0.001) ▲ Figure 2: Probability of developing AET grade 2 (grey line) and grade 3 (black line) using the logistic model based on V50. The 95% confidence intervals are plotted in dash-dotted lines. The actual incidences, together with its 95% confidence intervals, are plotted in the vertical lines. CCRT = concurrent chemoradiotherapy.