91 5 important to take into account when developing prediction models to identify patients at risk for developing mastication, dysphagia, or xerostomia problems after treatment. Consistent with previous research, the results in this paper show that objective and subjective measures do not seem to measure the same construct, and therefore separate prediction models with objective and subjective outcomes should be created, depending on the aim of the model. Conclusion This study showed significant but weak associations between objective tests of masticatory performance, swallowing, and salivary performance and patient-reported outcomes. It is therefore important to measure mastication, dysphagia and xerostomia related problems in patients with HNC both objectively and subjectively. This will acquire unique information and will help create the complete picture of a patients’ perspective and functioning.