Table 1.

Search strategies per literature database.

	Database and search terms	Limits	Number of records
Subject headings	Embase: (larynx/OR pharynx/OR hypopharynx/) AND (neoplasm/OR larynx disorder/OR pharynx disorder/OR larynx cancer/OR larynx carcinoma/OR pharynx cancer/OR pharynx carcinoma/) AND (radiotherapy/OR chemotherapy/OR chemoradiotherapy/OR adjuvant therapy/OR drug therapy/) AND (speech sound disorder OR speech/or speech disorder/OR swallowing/OR dysphagia/OR dysphonia/OR voice disorder/OR aphonia/OR speech intelligibility/OR xerostomia/OR dysarthria/OR esophagus speech/OR larynx prosthesis/OR trismus/OR “quality of life”/)	English	201
Subject headings	PubMed: (“Larynx”[Mesh] OR “Pharynx”[Mesh] OR “Hypopharynx”[Mesh]) AND (“Neoplasms”[Mesh] OR “Head and Neck Neoplasms”[Mesh] OR “Neoplasms, Second Primary”[Mesh] OR “Pharyngeal Neoplasms”[Mesh] OR “Oropharyngeal Neoplasms”[Mesh] OR “Tonsillar Neoplasms”[Mesh] OR “Nasopharyngeal Neoplasms”[Mesh] OR “Mouth Neoplasms”[Mesh] OR “Laryngeal Neoplasms”[Mesh] OR “Tongue Neoplasms”[Mesh] OR “Thyroid Neoplasms”[Mesh] OR “Salivary Gland Neoplasms”[Mesh] OR “Jaw Neoplasms”[Mesh] OR “Lip Neoplasms”[Mesh] OR “Thyroid Carcinoma, Anaplastic”[Mesh] OR “Neoplasms, Squamous Cell”[Mesh] OR “Neoplasms, Basal Cell”[Mesh] OR “Otorhinolaryngologic Neoplasms”[Mesh] OR “Hypopharyngeal Neoplasms”[Mesh] OR “Laryngeal Diseases”[Mesh] OR “Pharyngeal Diseases”[Mesh]) AND (“Radiotherapy”[Mesh] OR “Radiotherapy, Adjuvant”[Mesh] OR “Radiotherapy, High-Energy”[Mesh] OR “Radiotherapy, Image-Guided”[Mesh] OR “Radiotherapy, Intensity-Modulated”[Mesh] OR “Radiotherapy, Conformal”[Mesh] OR “Radiotherapy, Computer-Assisted”[Mesh] OR “Radiotherapy Planning, Computer-Assisted”[Mesh] OR “Radiotherapy Dosage”[Mesh] OR “Brachytherapy”[Mesh] OR “Radiosurgery”[Mesh] OR “Radiation Oncology”[Mesh] OR “Dose-Response Relationship, Radiation”[Mesh] OR “Consolidation Chemotherapy”[Mesh] OR “Induction Chemotherapy”[Mesh] OR “Maintenance Chemotherapy”[Mesh] OR “Chemotherapy, Adjuvant”[Mesh] OR “Chemotherapy, Cancer, Regional Perfusion”[Mesh] OR “Drug Therapy”[Mesh] OR “Drug Therapy, Combination”[Mesh] OR “Radiotherapy”[Mesh] OR “Radiation Dosage”[Mesh]) AND (“Articulation Disorders”[Mesh] OR “Speech”[Mesh] OR “Speech Sound Disorder”[Mesh] OR “Speech, Esophageal”[Mesh] OR “Speech, Alaryngeal”[Mesh] OR “Speech Intelligibility”[Mesh] OR “Speech Disorders”[Mesh] OR “Deglutition Disorders”[Mesh] OR “Deglutition”[Mesh] OR “Dysphonia” [Mesh] or “Voice Disorders” [Mesh] or “Hoarseness” [Mesh] or “Aphonia” [Mesh] OR “Xerostomia”[Mesh] OR “Dysarthria”[Mesh] OR “Larynx, Artificial”[Mesh] OR “Speech, Esophageal”[Mesh] OR “Trismus”[Mesh] OR “Quality of Life”[Mesh])	Adult: 19+ years English	304
Free text	Embase: (larynx∗ or pharynx∗ OR hypopharyn∗ OR laryngo∗ OR larynge∗) AND (cancer OR cancers OR neoplasm∗ OR tumour∗ OR tumor OR tumors OR carcinoma∗) AND (radiation∗ OR radiotherap∗ OR chemotherap∗ OR adjuvant therap∗ OR radiochemotherap∗) AND (deglut∗ OR swallow∗ OR dysphag∗ OR speech∗ OR voic∗ OR hoarse∗ OR aphon∗ OR rough∗ OR articulat∗ OR dysphon∗ OR (quality AND life) OR xerostom∗ OR dysarthr∗ OR anarthr∗ OR trismus)	Publication date: last year	397
Free text	PubMed: As per Embase Free Text	Publication date: from 2015/05/05 to 2016/05/05	148