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Commentary & Perspectives

Obesity’s Cancer Role Underestimated

A proposed framework highlights potential sources of bias in current estimates

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Obesity's role in cancer risk may be significantly underestimated due to measurement limitations in epidemiologic studies, as highlighted in a JAMA Oncology Viewpoint by Zilin Luo, MBBS, and colleagues. They introduce the PLUS framework, identifying four biases: prediagnostic weight loss, reliance on single-point weight data, improper use of BMI, and inadequate BMI thresholds. The research indicates that prediagnostic weight loss might lead to underrepresented BMI measurements, particularly in gastrointestinal cancers. Recommendations include better integration of obesity management in cancer prevention strategies and further research into the risks and benefits of interventions like bariatric surgery and glucagon-like peptide-1 receptor agonists.

Original Source(s)

Obesity’s Cancer Role Underestimated

  • by Kerri Miller

  • March 26, 2026

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