RESUMO
PURPOSE: Health literacy (HL) is a set of knowledge and skills that enables individuals to interpret and act upon health information, which is essential for health equity. There is a growing body of evidence in the field of HL in cancer care but there is, to our knowledge, no systematic review that explores the association between sociodemographic factors and HL among patients with cancer. The aim of this study was therefore to conduct a systematic review of the existing literature that assesses HL levels and the relationship between HL and sociodemographic factors in an adult cancer population. METHODS: This is a systematic review and its protocol was registered in PROSPERO (ID: CRD42021164071). The study was conducted in accordance with the PRISMA statement. The literature search, from December 2009 to September 2023, was made in six databases, AMED, CINAHL, Embase, MEDLINE, PsycINFO, and Web of Science Core Collection. RESULTS: Fifteen studies were included in the review. The included studies used nine different measurement tools for assessing HL. In the included studies between 11.9 % and 86 % had limited HL. We identified a relationship between limited HL and annual income, education level, ethnicity, living in rural areas and multiple comorbidities. CONCLUSION: The results indicate that limited HL is prevalent in the cancer population and should be acknowledge in everyday practice to meet health equity. Our awareness about sociodemographic factors and its association with HL, may enhance adherence to cancer treatment and quality of life, and lower physical and emotional distress.