PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Smartphone use during school hours by US youth

JAMA

2026-01-05
(Press-News.org)

About The Study: This study found that U.S. adolescents, on average, spent more than an hour using smartphones during school, with social media use accounting for most of that time. These objective findings from a large sample extend those of a prior smaller study based on self-report, which similarly demonstrated 1 hour of smartphone usage per school day.

Corresponding Author: To contact the corresponding author, Jason M. Nagata, MD, MSc, email jason.nagata@ucsf.edu.

To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/

(doi:10.1001/jama.2025.23235)

Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

Embed this link to provide your readers free access to the full-text article This link will be live at the embargo time https://jamanetwork.com/journals/jama/fullarticle/10.1001/jama.2025.23235?guestAccessKey=f4c023a2-8f3b-4729-98ea-635e11c19985&utm_source=For_The_Media&utm_medium=referral&utm_campaign=ftm_links&utm_content=tfl&utm_term=010526

END



ELSE PRESS RELEASES FROM THIS DATE:

Food insecurity and adverse social conditions tied to increased risk of long COVID in children

2026-01-05
Mass General Brigham researchers looked at data on 4,584 participants across 52 U.S. sites from the federally funded RECOVER-Pediatrics study Results identified social risk factors associated with greater odds of prolonged SARS-CoV-2 symptoms New research led by Mass General Brigham investigators suggests that long COVID is more prevalent in school-aged children and adolescents who experience economic instability and adverse social conditions. The multi-center, observational study found that the risk of long COVID was significantly higher in households that faced food insecurity and challenges such ...

Earliest, hottest galaxy cluster gas on record could change our cosmological models

2026-01-05
An international team of astronomers led by Canadian researchers has found something the universe wasn’t supposed to have: a galaxy cluster blazing with hot gas just 1.4 billion years after the Big Bang, far earlier and hotter than theory predicts.  The result, published today in Nature, could upend current models of galaxy cluster formation, which predict such temperatures occur only in more mature, stable galaxy clusters later in the universe’s life.  “We didn’t ...

Greenland’s Prudhoe Dome ice cap was completely gone only 7,000 years ago, first GreenDrill study finds

2026-01-05
BUFFALO, N.Y. — The first study from GreenDrill — a project co-led by the University at Buffalo to collect rocks and sediment buried beneath the Greenland Ice Sheet — has found that the Prudhoe Dome ice cap was completely gone approximately 7,000 years ago, much more recently than previously known. Published today (Jan. 5) in Nature Geoscience, the findings suggest that this high point on the northwest section of the ice sheet is highly sensitive to the relatively mild temperatures of the Holocene, the interglacial period that began 11,000 years ago and continues today.  “This is a ...

Scientific validity of blue zones longevity research confirmed

2026-01-05
New York, NY, Birmingham, AL, & Sassari, Italy — A new peer-reviewed paper published in The Gerontologist  provides the most comprehensive scientific response to date addressing recent critiques of the so-called “blue zones,” regions of the world known for unusually high concentrations of people living long, healthy lives. In the article, “The validity of blue zones demography: a response to critiques,” authors Steven N. Austad, PhD (Scientific Director, American Federation for Aging Research/AFAR and Distinguished Professor, Protective Life Endowed Chair in Healthy Aging Research at the University ...

Injectable breast ‘implant’ offers alternative to traditional surgeries

2026-01-05
Removing part or all of the breast during breast cancer treatment is a potential outcome for some people. Reconstructive surgical procedures often involve prosthetic implants or transplanted tissue from elsewhere in the body. So, researchers reporting in ACS Applied Bio Materials developed a prototype injectable paste derived from human skin cells that could help restore breast volume after tumor removal, with less scarring and shorter healing time than current options. “By promoting blood vessel growth and tissue remodeling ...

Neuroscientists devise formulas to measure multilingualism

2026-01-05
More than half of the world’s population speaks more than one language—but there is no consistent method for defining “bilingual” or “multilingual.” This makes it difficult to accurately assess proficiency across multiple languages and to describe language backgrounds accurately.  A team of New York University researchers has now created a calculator that scores multilingualism, allowing users to see how multilingual they actually are and which language is their dominant one.  The work, which uses innovative ...

New prostate cancer trial seeks to reduce toxicity without sacrificing efficacy

2026-01-05
The Alliance for Clinical Trials in Oncology has launched a randomized phase III clinical trial called RECIPROCAL (Alliance A032304) to explore whether doctors can optimize the timing of targeted radiation therapy to minimize side effects while preserving efficacy in men with advanced prostate cancer. “Our goal in this trial is to strategically improve both survival and quality of life for men living with advanced prostate cancer,” said Alliance study chair Thomas Hope, MD, a nuclear medicine physician and Professor in Residence at the University of California, San Francisco. “We hope to prove we can safely adjust the ...

Geometry shapes life

2026-01-05
Life begins with a single fertilized cell that gradually transforms into a multicellular organism. This process requires precise coordination; otherwise, the embryo could develop serious complications. Scientists at ISTA have now demonstrated that the zebrafish eggs, in particular their curvature, might be the instruction manual that keeps cell division on schedule and activates the appropriate genes in a patterned manner to direct correct cell fate acquisition. These insights, published in Nature Physics, could help improve the accuracy of embryo assessments in IVF. Nikhil Mishra ...

A CRISPR screen reveals many previously unrecognized genes required for brain development and a new neurodevelopmental disorder

2026-01-05
An international research team identified hundreds of genes essential for the development of brain cells, including one gene linked to a severe neurodevelopmental disorder not previously described. The study published in Nature Neuroscience offers a new approach to identifying genes involved in neurodevelopmental disorders, including autism. [Hebrew University] Which genes are required for turning embryonic stem cells into brain cells, and what happens when this process goes wrong? In a new study published today in Nature Neuroscience, researchers led by Prof. Sagiv Shifman from The Institute ...

Hot flush treatment has anti-breast cancer activity, study finds

2026-01-05
A drug mimicking the hormone progesterone has anti-cancer activity when used together with conventional anti-oestrogen treatment for women with breast cancer, a new Cambridge-led trial has found. A low dose of megestrol acetate (a synthetic version of progesterone) has already been proven as a treatment to help patients manage hot flushes associated with anti-oestrogen breast cancer therapies, and so could help them continue taking their treatment. The PIONEER trial has now shown that the addition of low dose megestrol to such treatment may ...

LAST 30 PRESS RELEASES:

Hidden acid imbalance in kidney disease raises red flags

No evidence to suggest medicinal cannabis is effective for depression, anxiety or PTSD: research

The Lancet Global Health: Modelling suggests climate change could drive millions globally into physical inactivity by 2050 and be linked to an estimated half a million premature deaths

Fathers’ health crucial to improving pregnancy and child outcomes

Major step towards a first global system to track health before pregnancy

Climate action could prevent over 13 million premature deaths, but equity choices matter for global health

Bull sharks have ‘friends’

New research shows how to diagnose people with Alzheimer’s plus a hard-to-identify dementia type

Large craters offer clues to the origin of asteroid 16 Psyche

Researchers develop biochar-based photocatalyst that rapidly removes antibiotic pollutants from water

ACP supports AAP’s evidence‑based childhood vaccine schedule

Half of Native Hawaiian University of Hawaiʻi students experience period poverty, study reveals

American College of Cardiology to host New Orleans Community Health Fair

UMass Amherst research links early adult drinking to middle age cognitive decline

Early life stress linked to long-lasting digestive issues

A built-in warning system: How mosquitoes detect a common compound in plant-based mosquito repellent

Rice hosts first-of-its-kind workshop exploring how AI can accelerate discoveries in major neutrino experiment

Researchers combine flavor and nutritional value in Amazonian chocolate

Study identifies causes of potato dry rot in Colorado

Universal, ready-to-use immunotherapy detects and destroys endometrial cancer

New $1.9 million grant lets Montana State team deepen understanding of avian flu

Storytelling may hold key to building memory

Pharmacy team develops 3D-printed bandage to help heal chronic wounds

Cannibalism takes major bite out of young blue crabs, but the shallows offer a refuge

Groundbreaking PKU innovation can detect disease from a drop of blood

Differences in brain activity between ADHD and neurotypical adults

How do people quickly respond to scary sounds?

Coastal ocean chemistry now substantially shaped by humans

Brain computer interface enables rapid communication for two people with paralysis

Computational model measures key aging metric from routine biopsies

[Press-News.org] Smartphone use during school hours by US youth
JAMA