Obesity

Brain Serotonin Transporter Is Elevated in Obesity: Bayesian and Frequentist Meta‐Analyses

Diabetes Obes MetabPublished Systematic review and meta-analysis

Pooled result · Brain SERT availabilityResult — go to the resultPooled SMD 0.2675 CrI 0.0075–0.5275

Authors' conclusion

A modest elevation in brain SERT availability in subjects with obesity was supported by frequentist meta-analysis, but this finding was not conclusively supported by Bayesian hierarchical modelling.

Study context

Population
PET and SPECT studies comparing brain serotonin transporter (SERT) availability between obese and non-obese individuals5 studies
Participants
142 vs 115
Comparison
Obese vs non-obese individuals
  • Obesen = 142
  • Non-obesen = 115reference
Outcome
Brain SERT availability
Methodological detailsfrequentist and Bayesian meta-analyses, meta-regression
  • Frequentist and Bayesian meta-analyses
  • Meta-regression

Pooled result

As reported in the abstract

Pooled SMD

0.2675

CrI 0.0075–0.5275

P = 0.0437

With obesityvs Without obesity
pooled SMD 0.2675 (CrI 0.0075–0.5275); P = 0.0437

Further pooled results

Moderators (studies, radiopharmaceuticals, regions of interest)

No substantial differences across studies, radiopharmaceuticals and regions of interest

Original publication

Brain Serotonin Transporter Is Elevated in Obesity: Bayesian and Frequentist Meta‐Analyses. Diabetes Obes Metab. Published 21 May 2026. doi:10.1111/dom.70887

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