ADL 1 ADL disability 1 Activities of Daily Living 1 Aged 1 Article 1 Cognition 1 Elderly 1 European Quality of Life 5 Dimensions Visual Analogue Scale 1 Follow-up 1 Functional status Head and Neck Neoplasms 1 Head and neck cancer 1 Humans 1 IADL 1 Mini Mental State Examination 1 Mood 1 Patient Health Questionnaire 2 1 Quality of Life 1 Quality of life 1 Surgery 1 aged 1 cancer surgery 1 cognition 1 controlled study 1 daily life activity 1 deterioration 1 female 1 follow up 1 functional status 1 head and neck cancer 1