Researchers found that cancer-related misinformation constitutes approximately 6% of Reddit cancer discussions, with substantial variation across communities and topics. The study introduces a seven-dimensional taxonomy for characterizing cancer misinformation in Reddit discussions of breast, lung, colon, and prostate cancer. Using expert-annotated data, the authors evaluated multiple large language models for scalable annotation, finding that few-shot prompting substantially improves classification performance. Recurring misinformation narratives centered on unsupported treatments, distrust of conventional medicine, and misleading claims about diagnosis and screening.
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