A Narrative Review of the Current Research in Cancer-Related Pain Inequities: The Necessity of Applying Intersectionality to Advance Cancer Pain Research

Cancer-related pain has a significant impact on quality of life for patients with cancer. In populations without cancer, there are documented pain inequities associated with minoritized racial and/or ethnic groups, women, and low socioeconomic status. However, our understanding of pain inequities specifically among patients with cancer remains incomplete. We narratively synthesized published quantitative research on cancer-related pain inequities in the US in the past decade. A search identified 17 English-language articles examining pain for patients with various cancer types at different treatment stages. Our review revealed mixed findings comparing cancer-related pain by racial group (e.g., Black vs White) and sex (male vs female), but consistent findings indicating that people with lower (vs higher) socioeconomic status and younger (vs older) patients report more cancer-related pain. Research on cancer pain among sexual and gender minorities remains scant. Key research gaps include a need for more research that incorporates an intersectional perspective by exploring intersecting subgroups and measuring social and structural processes that drive pain inequities. These findings underscore an important need for researchers to use an intersectional approach to cancer pain to help elucidate key populations at-risk for exacerbated cancer-related pain and identify ways to mitigate social and structural processes that drive these inequities. There are known differences in pain experiences among people from different racial or ethnic groups, sex (male or female) or gender (men or women), and socioeconomic groups such as low income people. However, we don't fully understand these differences among cancer patients yet. This review looks at the past 10 years of research on how cancer-related pain may differ for people from different sociodemographic groups. We collected information from 17 studies in the US that looked at how pain from different types of cancer and different stages of treatment may differ for people from these different groups. We found mixed results when comparing pain between racial groups and sex and/or gender groups, but consistently found that people with lower incomes and younger patients reported more pain. There's not much research on how cancer pain affects sexual and gender minorities (LGBTQ+ people). Our review suggests that we need an intersectional approach to best understand cancer-related pain in order to best address how structural discrimination influences pain. Researchers should use an intersectional perspective, which will help us find out who's most at risk of severe cancer pain and find ways to help them better.