Table 1 Eligibility criteria of the studies for the systematic review

Study population

 Inclusion criteria

  •Adults (⩾18 years old)

  •Diagnosed with dysphagia

  •Advanced cancer, with evidence of at least one of the following criteria:

   (1) Metastatic primary solid cancer

   (2) Locally advanced solid cancers

   (3) Advanced hematological neoplasms

 Exclusion criteria

  •Primary site cancer in head and neck or upper gastrointestinal tract

Study design

 Inclusion criteria

  •Observational studies: retrospective or prospective studies

  •Prognostic studies

 Exclusion criteria

  •Review articles, discussions, letters, editorials, comments, case reports, case series, case studies, cross-sectional studies, and qualitative studies

Outcome

 Survival

  Prevalence of deglutition disorders

Languages

 English, Spanish, and Brazilian Portuguese

Years

 Studies published from 2011 to 2023