Acute symptoms during the course of head and neck radiotherapy or chemoradiation are strong predictors of late dysphagia  Hans Paul van der Laan, Hendrik P. Bijl, Roel J.H.M. Steenbakkers, Arjen van der Schaaf, Olga Chouvalova, Johanna G.M. Vemer-van den Hoek, Agata Gawryszuk, Bernard F.A.M. van der Laan, Sjoukje F. Oosting, Jan L.N. Roodenburg, Kim Wopken, Johannes A. Langendijk  Radiotherapy and Oncology  Volume 115, Issue 1, Pages 56-62 (April 2015) DOI: 10.1016/j.radonc.2015.01.019 Copyright © 2015 Elsevier Ireland Ltd Terms and Conditions

Fig. 1 Reclassification plots. For each patient, the normal tissue complication probability (NTCP) of late dysphagia according to the reference model is plotted against the NTCP according to the dynamic models of weeks 3, 4, 5 and 6. Patients are grouped (and colored) on the basis of the acute symptom scores in the corresponding weeks: the quartile of patients (25%) with the lowest acute symptom scores (green) and the quartile with the highest acute symptom scores (red). The remaining patients (50%) had intermediate acute symptom scores (blue). The diamonds represent the average NTCP values of the patient subgroups. Radiotherapy and Oncology 2015 115, 56-62DOI: (10.1016/j.radonc.2015.01.019) Copyright © 2015 Elsevier Ireland Ltd Terms and Conditions