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Mental Health AI Agents: 0.80 Sensitivity, Weak Real-World Evidence

Mental-health AI agents are software systems that use artificial intelligence to screen, coach, triage, document, or coordinate care across mental-health workflows. A 2026 systematic review and meta-analysis of systems published from 2023 to 2025 found strong offline diagnostic metrics, but the evidence still leans much more heavily on chatbot demos and benchmark tasks than on …

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NOS3 TT Variant Linked to 1.72x Cognitive Risk in First-Episode Depression

A 2026 cross-sectional study of 519 older adults with first-episode depression found that the NOS3 rs1799983 TT genotype was independently associated with cognitive impairment, adjusted OR 1.720 (95% CI 1.027-2.882).1 The result is strongest as a vascular-inflammation clue, not as a ready clinical genetic test. Research Highlights TT genotype carried the headline signal: in multivariable …

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Psychopathy, Empathy, and Cortical Structure in 804 Incarcerated Men

Psychopathy is not a simple “low empathy equals abnormal brain scan” story. In 804 incarcerated men, psychopathy factors tracked empathic concern, perspective taking, cortical thickness, surface area, and cortical organization—but self-reported empathy scores did not map cleanly onto cortical structure.1 Research Highlights The sample was unusually large for forensic MRI. Radecki et al. analyzed 804 …

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Cancer Survivor Neuropathic Pain: Duloxetine and Exercise Signals

MHD featured image for cancer survivor neuropathic pain treatment evidence.

A 2026 scoping review screened 956 systematic reviews/guidelines and 604 original studies on cancer-survivor neuropathic pain, but only 11 pharmacological, 2 psychological, and 3 exercise studies were eligible.1 The practical signal is narrow: duloxetine and some exercise programs have the clearest support, while psychological and interdisciplinary evidence is still too thin for confident treatment ranking. …

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Prenatal PM2.5 Linked to Autism-Relevant Newborn Amino Acid Metabolism

MHD featured image for prenatal air pollution, newborn metabolomics, and autism risk.

A matched case-control study of 50 children with autism spectrum disorder and 50 controls found that newborn amino acid metabolism overlapped with both later autism diagnosis and prenatal air-pollution exposure.1 The central pathway, aspartate and asparagine metabolism, was associated with autism (p = 0.01), pregnancy PM2.5 (p < 0.001), first-trimester PM2.5 (p < 0.001), and …

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Big Five Personality Traits and Sexual Fantasies in 5,225 Adults

Sexual fantasies are not distributed randomly, but the pattern is subtler than popular personality stereotypes imply. In 5,225 adults, conscientiousness and agreeableness tracked lower fantasy frequency, while negative emotionality—especially the depression facet—tracked higher fantasy frequency across multiple fantasy domains.1 Research Highlights 5,225-person sample: Cannoot et al. analyzed adults with mean age 58.30 years; 56.5% were …

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