Fig. 2.
Change of cognitive functioning within a two-year follow-up. Graphs indicate mean cognitive performance (in percentile ranks) in NeuroCog FX subtests at baseline after surgery and at two-year follow-up, separated for dichotomized treatment groups. The asterisk indicates a statistically significant difference in cognitive change between groups; * p < 0.05; bars indicate standard error of mean. a Irradiated patients (RT+, radiotherapy only or combined radio-chemotherapy, n = 34) and non-irradiated patients (RT-, chemotherapy only or watch-and-wait, n = 52). b Patients with chemotherapy (ChT+, chemotherapy only or combined radio-chemotherapy, n = 45) and without chemotherapy (ChT-, radiotherapy only or watch-and-wait, n = 41)