ObjectiveThis study aims to describe patterns, sources, and reasons for cannabis use among cancer patients during active treatment (+CDTX) compared to no‐use during active treatment (−CDTX).MethodsData are from 385 surveys collected via REDCap during phase I of an ongoing study among adult cancer patients seen at an NCI‐designated comprehensive cancer center within the last 5 years of treatment. A harmonized survey was created with 11 other NCI centers to assess cannabis use patterns, sources, and reasons for use. Sociodemographics and cancer details were also collected via self‐report. Descriptive statistics were calculated and stratified by +/−CDTX. Chi‐squared tests were conducted to compare proportions between groups.ResultsAmong the sample [49.5 years (SD 15.9); 53.0% male; and 41.6% Hispanic/Latino], 41.0% + CDTX and 59.0% −CDTX. A majority (71.8%) of +CDTX initiated use before diagnosis versus 44.1% in −CDTX (p < 0.0001); patients diagnosed with stage 4 cancer had a statistically significant higher prevalence of +CDTX (60.0%; p = 0.003); 53.3% in radiation reported +CDTX compared to 42.8% in chemotherapy, and 36.4% in immunotherapy. Dispensaries and local dealers were the top sources of cannabis in both groups. Among +CDTX, 44.3% consumed cannabis at least once a day DTX, dominant cannabinoids used were CBD (35.2%), Delta‐8‐THC (18.3%), and CBD + THC ratio (14.1%); 12.7% were unsure what they consumed. Joints were the most common inhalation method (61.5%), and store‐bought candy was the most common edible (39.2%). Depression/mood, pain, and enjoyment were the top three reasons for +CDTX compared to enjoyment, depression/mood, and nausea/upset stomach in −CDTX (p = 0.02).ConclusionsPatterns, sources, and reasons for cannabis use varied between +CDTX and ‐CDTX. Future studies should examine the impacts of cannabis and specific cannabinoids on cancer treatment, drug interactions, survival outcomes, and quality of life.
