Figure 3From: Dosimetric predictors of hypothyroidism in oropharyngeal cancer patients treated with intensity-modulated radiation therapyKaplan-Meier curves of freedom from hypothyroidism for subgroups of the patients with pre-radiation thyroid volumes ≥8 cc. The lower incidence group had NTCP < 0.8 and the higher incidence group had NTCP > 0.8, based on the mixture model reported in Ronjom et al. [16].Back to article page