Substance use among individuals with cancer: A US population-based cohort study.

Abstract

e23133 Background: The prevalence of concurrent substance use or comorbid substance use disorder (SUD) among individuals with a cancer diagnosis, and their participation in substance use treatment, has not yet been described in a large US population-based cohort. Methods: A population-based cohort study was conducted using cross-sectional survey data collected by the National Survey on Drug Use & Health (NSDUH) between 2015-2022. Descriptive statistics were calculated to describe two populations: those with any kind of cancer diagnosis within the preceding 12 months and either comorbid SUD as defined by the Diagnostic and Statistical Manual of Mental Illness (DSM)-5 or concurrent use of any of the following substances: alcohol, marijuana, cocaine, crack, heroin, methamphetamines, or misuse of prescription drugs. Chi-square tests were conducted to describe associations with the demographic and geographic characteristics of these individuals. Results: Between 2015-2022, 432,764 individuals (53% female) completed the survey. A total of 2,547 respondents had a cancer diagnosis in the preceding 12 months; the most common cancer types were breast cancer (17.0%), non-melanoma skin cancers (16.2%), and prostate or testicular cancer (11.0%). Among this cohort, 1,664 (65%) reported concurrent alcohol use, 354 (14%) reported marijuana use, and 82 (3%) reported illicit use of other substances. Among those with an active cancer diagnosis in the preceding 12 months, 103 (4%) met DSM-5 criteria for a comorbid SUD based on survey responses. Among individuals with a past-year cancer diagnosis, there was a statistically significant association between concurrent substance use and income bracket (X2 = 92.67, p < 0.001), concurrent substance use and race (X2=46.12, p< 0.001), and between concurrent substance use and population density (X2= 7.05, p = 0.029). Zero respondents with cancer and either concurrent substance use or comorbid SUD received outpatient treatment for substance use in the preceding year, three (0.002%) received inpatient treatment, and seven (0.004%) participated in a support group. Among respondents with comorbid SUD, many reported being recently asked by a healthcare professional about their alcohol (83%) or drug use (67%), while only 1.9% reported recently receiving information from a healthcare professional about substance use treatment. Conclusions: There is overlap between the population with a cancer diagnosis and that with concurrent substance use or comorbid SUD. Based on population-level survey data, these individuals have low rates of participation in outpatient or inpatient substance treatment, and report that they do not often receive information about substance use treatment from healthcare professionals. Describing this population may inform how providers approach their unique healthcare needs.