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Structural brain volumes and delay discounting

A cross-sectional study found that structural brain volumes are associated with delay discounting, a key component of impulsive decision-making, in college-aged adults. The multilayer perceptron model provided an accurate estimate of delay discounting, shedding light on the neural basis of impulsive behavior.

SourceJAMA Network·JournalJAMA Psychiatry·DateSep 23, 2026

Study reveals the work & health insurance roller coaster millions of Americans ride

A new study reveals that workers with variable hours and incomes are more likely to rely on Medicaid or ACA Marketplace plans, which may be affected by 2027 changes. Millions of low- and middle-income workers with irregular schedules will be particularly susceptible to Medicaid disenrollment due to fluctuating work hours.

SourceMichigan Medicine - University of Michigan·JournalJAMA Network Open·TypeData/statistical analysis·DateSep 15, 2026

Brain aging may be detected decades before symptoms appear, with links to gut health

A new UCLA study has found a connection between brain aging and gut biology, suggesting that people's brains may be aging decades before symptoms appear. The study, published in eBioMedicine, analyzed brain scans and stool samples to identify a link between brain communication patterns, gut bacteria, and brain aging.

SourceUniversity of California - Los Angeles Health Sciences·JournalEBioMedicine·TypeExperimental study·DateSep 10, 2026

Lancet definition vs other criteria for obesity diagnosis in adults

The Lancet Diabetes and Endocrinology Commission on Obesity definition of obesity was found to have similar diagnostic accuracy as other definitions. The study compared the commission's definition with those from other reputable sources, including the World Health Organization (WHO) and the National Institutes of Health (NIH).

SourceJAMA Network·JournalJAMA Network Open·DateAug 7, 2026

Cancer medicine approvals in the US

A cross-sectional study examines trends in US FDA-approved cancer medicines for adult solid tumors between 2006 and 2025. The analysis reveals significant increases in approvals, particularly for original indication approvals.

SourceJAMA Network·JournalJAMA·DateJul 30, 2026

Most adults born very premature go on to thrive, but one in five face lasting economic and social struggles

A landmark study tracks preterm babies from birth to middle adulthood, identifying early cognitive development as the strongest predictor of who flourishes and struggles. Childhood IQ at age 8 is linked to adult outcomes, with a 15-point increase associated with a 79% reduction in poor economic and social functioning.

SourceUniversity of Warwick·JournalJAMA Pediatrics·TypeExperimental study·DateJul 20, 2026

Sodium bicarbonate for in-hospital cardiac arrest

A new study published in JAMA found no significant difference between sodium bicarbonate and placebo in sustaining return of spontaneous circulation. The findings suggest that routine administration of sodium bicarbonate for patients with in-hospital cardiac arrest may not be necessary.

SourceJAMA Network·JournalJAMA·DateJun 11, 2026

Wearable devices and data sharing in the US

In this serial survey study, wearable device use increased among U.S. adults, but daily use and clinician-directed data sharing remained limited. The findings suggest a need for approaches to help realize the potential of wearable devices as health care tools.

SourceJAMA Network·JournalJAMA Network Open·DateJun 10, 2026

One in three middle-aged adults struggle with basic, ‘everyday’ health tasks

A new study found that one in three middle-aged American adults can't consistently read prescription instructions correctly or recall details from doctor visits involving chronic conditions. The researchers recommend simplifying health information using plain language to improve patient outcomes and reduce harm.

SourceNorthwestern University·JournalJournal of General Internal Medicine·TypeObservational study·DateJun 10, 2026

Hearing aids for adults with mild to moderate hearing loss

A recent study published in JAMA examines the effectiveness of hearing aids for adults with mild to moderate hearing loss, highlighting the benefits and limitations of both prescription and over-the-counter devices. The research suggests that personalized fitting and follow-up care are crucial for optimal outcomes.

SourceJAMA Network·JournalJAMA·DateMay 27, 2026

Treatment of anxiety for adults in primary care settings

The American Medical Association (AMA) has developed guidelines for treating anxiety disorders in adults in primary care settings. Behavioral therapy, including cognitive-behavioral therapy (CBT), and medication, such as selective serotonin reuptake inhibitors (SSRIs), are recommended treatments.

SourceJAMA Network·JournalJAMA Internal Medicine·DateMay 4, 2026

Heavy drinking, alcohol use disorder, and obesity

A nationally representative study found nearly 1 in 10 U.S. adults with heavy drinking and obesity conditions, highlighting the need for preventive efforts in younger and middle-aged adults without insurance or Medicaid coverage to curb rising rates of alcohol-associated liver disease deaths.

SourceJAMA Network·JournalJAMA Internal Medicine·DateApr 20, 2026

Online searches for gun-related harm

A notable minority of US youth and young adults, particularly those facing structural disadvantages and mental health distress, engage in intentional online searches for gun-related harm. Public health strategies combining digital interventions with structural reforms offer promise to reduce gun-related harm among vulnerable populations.

SourceJAMA Network·JournalJAMA Network Open·DateApr 15, 2026

Loneliness affects memory in older adults but does not accelerate brain decline, major international longitudinal study suggests

A major European study found that loneliness affects the memory of older adults, but does not speed up mental decline over time. Participants who reported high levels of loneliness performed worse on initial memory tests, but their ability to recall information declined at a similar rate as those with lower loneliness levels.

SourceTaylor & Francis Group·JournalAging & Mental Health·TypeObservational study·DateApr 14, 2026

Scientists reverse brain aging, with a nasal spray

Researchers developed a nasal spray that reversibly reduces brain inflammation, restores cellular power plants, and improves memory. The treatment bypasses the brain's protective shield through intranasal delivery, suppressing chronic inflammation and promoting successful brain aging.

SourceTexas A&M University·JournalJournal of Extracellular Vesicles·DateApr 14, 2026

Mirtazapine for methamphetamine use disorder

In this randomized clinical trial, mirtazapine effectively reduced methamphetamine use in adults with methamphetamine use disorder. The study's findings have important implications for the treatment of this condition, which currently lacks approved pharmacotherapies.

SourceJAMA Network·JournalJAMA Psychiatry·DateApr 1, 2026