Obesity

Weight Loss, Obesity Medication, and Risk of Obesity‐Associated Cancer: A Meta‐Analysis of Randomized Controlled Trials

Obesity (Silver Spring)Published Systematic review and meta-analysis of randomised trials

Pooled result · Overall obesity-related cancerResult — go to the resultRelative risk 1.03 95% CI 0.78–1.37

Authors' conclusion

Weight reduction mediated by current AOMs was not associated with a reduced risk of overall or site-specific obesity-associated cancer in patients with overweight or obesity, while a decreased risk of overall obesity-associated cancer was observed in coagonist users.

Study context

Population
RCTs of antiobesity medications (AOMs); patients with overweight or obesity
Participants
40,731 participants25 RCTs
Comparison
Antiobesity medications vs placebo
Outcome
Risk of overall obesity-related cancer
Methodological detailsrandom-effects model, Searched PubMed, Embase, Cochrane CENTRAL, Web of Science and ClinicalTrials.gov from inception to December 2024
  • Random-effects model
  • Searched PubMed, Embase, Cochrane CENTRAL, Web of Science and ClinicalTrials.gov from inception to December 2024

Pooled result

Overall obesity-related cancer

Relative risk

1.03

95% CI 0.78–1.37

AOMsvs Placebo
RR 1.03 (95% CI 0.78–1.37)

As reported in the abstract

Further pooled results

OutcomeRR (95% CI)
Overall obesity-related cancer per 5 kg weight reduction mediated by AOMsPer 5 kg weight reduction0.97 (0.84–1.12)
Overall obesity-associated cancer, subgroup: coagonists (tirzepatide, cotadutide, cagrilintide)Coagonistsvs PlaceboSubgroup analysis0.43 (0.19–0.97)
Overall obesity-associated cancer per 5 kg weight reduction mediated by coagonistsPer 5 kg weight reduction; marginal association · subgroup analysis0.79 (0.62–1.00)

Overall obesity-related cancer per 5 kg weight reduction mediated by AOMs

Every 5 kg weight reduction not associated with site-specific cancer risk

Original publication

Weight Loss, Obesity Medication, and Risk of Obesity‐Associated Cancer: A Meta‐Analysis of Randomized Controlled Trials. Obesity (Silver Spring). Published 4 November 2025. doi:10.1002/oby.70054

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