157 8 neck cancer patients treated with concurrent chemoradiotherapy and preventive swallowing exercises. Eur Arch Otorhinolaryngol, 2015. 272(11): p. 352131. 21. Lango, M.N., et al., Baseline health perceptions, dysphagia, and survival in patients with head and neck cancer. Cancer, 2014. 120(6): p. 840-7. 22. van der Laan, H.P., et al., Impact of radiation-induced toxicities on quality of life of patients treated for head and neck cancer. Radiother Oncol, 2021. 160: p. 4753. 23. Kraaijenga, S.A.C., et al., Evaluation of long term (10-years+) dysphagia and trismus in patients treated with concurrent chemo-radiotherapy for advanced head and neck cancer. Oral Oncology, 2015. 51(8): p. 787-794. 24. Lahtinen, S., et al., Quality of life in head and neck cancer patients at 5 years after free flap reconstruction: a significant decline during the follow-up. Eur Arch Otorhinolaryngol, 2022. 25. de Campos, R.J., P.V. Palma, and I.C. Leite, Quality of life in patients with dysphagia after radiation and chemotherapy treatment for head and neck tumors. J Clin Exp Dent, 2013. 5(3): p. e122-7. 26. Rinkel, R.N., et al., Prevalence of swallowing and speech problems in daily life after chemoradiation for head and neck cancer based on cut-off scores of the patient-reported outcome measures SWAL-QOL and SHI. Eur Arch Otorhinolaryngol, 2016. 273(7): p. 184955. 27. Rinkel, R.N., et al., Patient-reported symptom questionnaires in laryngeal cancer: voice, speech and swallowing. Oral Oncol, 2014. 50(8): p. 759-64. 28. Christianen, M.E., et al., Predictive modelling for swallowing dysfunction after primary (chemo)radiation: results of a prospective observational study. Radiother Oncol, 2012. 105(1): p. 107-14. 29. Lahtinen, S., et al., Swallowing-related quality of life after free flap surgery due to cancer of the head and neck. Eur Arch Otorhinolaryngol, 2019. 276(3): p. 821826. 30. Bjordal, K., et al., A Prospective Study of Quality of Life in Head and Neck Cancer Patients. Part II: Longitudinal Data. Laryngoscope, 2001. 111: p. 1440–1452. 31. Reeve, B.B., et al., Factors that impact health-related quality of life over time for individuals with head and neck cancer. Laryngoscope, 2016. 126(12): p. 27182725. 32. Jansen, F., et al., Study retention and attrition in a longitudinal cohort study including patient-reported outcomes, fieldwork and biobank samples: results of the Netherlands quality of life and Biomedical cohort study (NET-QUBIC) among 739 head and neck cancer patients and 262 informal caregivers. BMC Med Res Methodol, 2022. 22(1): p. 27. 33. Verdonck-de Leeuw, I.M., et al., Advancing interdisciplinary research in head and neck cancer through a multicenter longitudinal prospective cohort study: the NETherlands QUality of life and BIomedical Cohort (NETQUBIC) data warehouse and biobank. BMC Cancer, 2019. 19(1): p. 765. 34. Paleri, V., H. Mehanna, and R.G. Wight, TNM classification of malignant tumours 7th edition: what's new for head and neck? Clin Otolaryngol, 2010. 35(4): p. 270-2. 35. Rogers, S.N., et al., Feasibility study of the retrospective use of the Adult Comorbidity Evaluation index (ACE-27) in patients with cancer of the head and neck who had radiotherapy. Br J Oral Maxillofac Surg, 2006. 44(4): p. 283-8. 36. Burnham, K.P. and D.R. Anderson, Multimodel Inference. Sociological Methods & Research, 2016. 33(2): p. 261-304. 37. Christianen, M.E., et al., Delineation of organs at risk involved in swallowing for radiotherapy treatment planning. Radiother Oncol, 2011. 101(3): p. 394402. 38. Rinkel, R.N., et al., The psychometric and clinical validity of the SWAL-QOL questionnaire in evaluating swallowing problems experienced by patients with oral and oropharyngeal cancer. Oral Oncol, 2009. 45(8): p. e67-71.