Mindfulness-based Interventions Across the Cancer Continuum in the United States: A Scoping Review

Abstract

Objective To review mindfulness-based interventions (MBIs) tested in randomized controlled trials (RCT) across the cancer continuum. Data Source Articles identified in PubMed, CINAHL, Web of Science, PsycINFO, and Embase. Study Inclusion and Exclusion Criteria Two independent reviewers screened articles for: (1) topic relevance; (2) RCT study design; (3) mindfulness activity; (4) text availability; (5) country (United States); and (6) mindfulness as the primary intervention component. Data Extraction Twenty-eight RCTs met the inclusion criteria. Data was extracted on the following variables: publication year, population, study arms, cancer site, stage of cancer continuum, participant demographic characteristics, mindfulness definition, mindfulness measures, mindfulness delivery, and behavioral theory. Data Synthesis We used descriptive statistics and preliminary content analysis to characterize the data and identify emerging themes. Results A definition of mindfulness was reported in 46% of studies and 43% measured mindfulness. Almost all MBIs were tested in survivorship (50%) or treatment (46%) stages of the cancer continuum. Breast cancer was the focus of 73% of cancer-site specific studies, and most participants were non-Hispanic white females. Conclusion The scoping review identified 5 themes: (1) inconsistency in defining mindfulness; (2) differences in measuring mindfulness; (3) underrepresentation of racial/ethnic minorities; (4) underrepresentation of males and cancer sites other than breast; and (5) the lack of behavioral theory in the design, implementation, and evaluation of the MBI.