Backgrounds: Assessing quality of life (QoL) using a well-developed and validated questionnaire is an essential part of a breast cancer-related lymphedema (BCRL) treatment. However, a QoL questionnaire with the best psychometric properties is so far unknown. The aim of this systematic review is to evaluate the psychometric properties of the questionnaires measuring the QoL of patients with BCRL.
Methods: A thorough search was performed to identify published studies in electronic databases such as Medline (via Ovid), EBSCOhost, PubMed, Scopus, and Web of Science, on 8 February 2022, by using search terms as follows: 'quality of life'; 'breast cancer'; 'upper limb'; 'lymphedema'; 'questionnaire'; and 'measurement properties.' Two reviewers conducted article selection, data extraction, and quality assessment independently. The third reviewer helped solve any possible disagreements between the two reviewers. The COSMIN checklist and manual were used to assess the quality of included studies.
Results: A total of nineteen articles with nine questionnaires were included and assessed using the COSMIN Risk of Bias checklist. Most studies only assessed content validity, structural validity, internal consistency, reliability, and construct validity. Lymph-ICF-UL showed the most 'sufficient' and 'high' quality of evidence ratings for its measurement properties.
Conclusion: The most appropriate questionnaire for use based on our assessment is Lymph-ICF-UL.
Keywords: breast cancer-related lymphedema; psychometric properties; quality of life; questionnaire.