aceMetabolites stratify future major depressive disorder risk in obese population: a longitudinal machine learning analysis
Background Obesity is a well-established risk factor for major depressive disorder (MDD), yet the risk is not uniform, highlighting the need for precise risk stratification. This study aimed to develop a metabolomics-based prediction model to identify high-risk metabolic phenotypes among obese participants and to elucidate the causal metabolic pathways involved. Methods Forty-one-thousand-four-hundred-fifty-nine obese participants were followed for a median of 14.4 years. We integrated multiple machine learning…
1H-NMR metabolomic study of whole blood from hatchling loggerhead sea turtles (Caretta caretta) exposed to crude oil and-or Corexit by Bembenek Bailey, Stasia A.; Niemuth, Jennifer N.; McClellan-Green, Patricia D.; Godfrey, Matthew H.; Harms, Craig A.; Stoskopf, Michael K.. CC BY 4.0 · https://creativecommons.org/licenses/by/4.0
Researchers developed metabolomics-based machine learning models to stratify future major depressive disorder risk among 41,459 obese participants followed for a median of 14.4 years. The optimized LightGBM model achieved AUCs of 0.844, 0.824 and 0.834 for 3-, 5- and 9-year predictions and outperformed existing clinical models, with temporal validation showing AUCs of 0.738-0.776.
The work matters because obesity is a known but non-uniform risk factor for depression, and a validated predictive framework could enable earlier identification of high-risk metabolic phenotypes for targeted intervention. What remains uncertain is generalizability beyond the single biobank used for temporal validation and whether the identified metabolite mediators translate into effective preventive strategies.
- Study followed 41,459 obese participants for median 14.4 years and documented 3,642 incident MDD cases.
- Researchers integrated multiple machine learning algorithms to build 3-, 5-, and 9-year risk models with temporal validation within same biobank.
- Mediation Mendelian randomization analysis was used to investigate causal relationships within obesity-metabolite-MDD pathway.
- Authors propose metabolomic signatures challenge uniform obesity-MDD association and enable precision medicine targeting.
A LightGBM model trained on metabolomic data predicted incident major depressive disorder among obese participants with AUCs around 0.82-0.84 over 3 to 9 years and outperformed existing clinical models.
The rundown
The analysis included 41,459 obese participants followed for a median of 14.4 years, during which 3,642 incident MDD cases were documented. Models were developed for 3-, 5-, and 9-year horizons and tested with temporal validation within the same biobank.
Beyond prediction, the study used mediation Mendelian randomization to assess whether key metabolites causally mediate the obesity to MDD pathway, reporting mediation proportions of -11.5% and -35.3%.
Sources
- Peer-reviewedPsychological Medicine2026-07-29
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