Figure 2From: Normal tissue complication probability model parameter estimation for xerostomia in head and neck cancer patients based on scintigraphy and quality of life assessments The observed quality of life (QoL) data and the fitted dose–response curve for the normal tissue complication probability of the incidence of grade 3 + xerostomia. (The endpoint was defined as moderate to severe xerostomia 1 year after the completion of RT on the QLQ-HN35 questionnaires). Dashed lines show 95% confidence intervals for the model fit to the QoL data (solid line). The squares represented the average probability for groups of patients in bins 4-Gy width. (All individual data points were used in the NTCP fitting).Back to article page