581,309 results match your criteria: "University. of California[Affiliation]"
Health Aff (Millwood)
January 2025
Jordan Everson, Office of the Assistant Secretary for Technology Policy, Washington, D.C.
Effective evaluation and governance of predictive models used in health care, particularly those driven by artificial intelligence (AI) and machine learning, are needed to ensure that models are fair, appropriate, valid, effective, and safe, or FAVES. We analyzed data from the 2023 American Hospital Association Annual Survey Information Technology Supplement to identify how AI and predictive models are used and evaluated for accuracy and bias in hospitals. Hospitals use AI and predictive models to predict health trajectories or risks for inpatients, identify high-risk outpatients to inform follow-up care, monitor health, recommend treatments, simplify or automate billing procedures, and facilitate scheduling.
View Article and Find Full Text PDFDiabetes Care
January 2025
Department of Medicine, University of California San Diego, La Jolla, CA.
Objective: Plasma metabolite profiling has uncovered several nonglycemic markers of incident type 2 diabetes (T2D). We investigated whether such biomarkers provide information about specific aspects of T2D etiology, such as impaired fasting glucose and impaired glucose tolerance, and whether their association with T2D risk varies by race.
Research Design And Methods: Untargeted plasma metabolite profiling was performed of participants in the FINRISK 2002 cohort (n = 7,564).
Proc Natl Acad Sci U S A
January 2025
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095.
Crystallization of the lunar magma ocean yielded a chemically unique liquid residuum named KREEP. This component is expressed as a large patch on the near side of the Moon and a possible smaller patch in the northwest portion of the Moon's South Pole-Aitken basin on the far side. Thermal models estimate that the crystallization of the lunar magma ocean (LMO) could have spanned from 10 and 200 My, while studies of radioactive decay systems have yielded inconsistent ages for the completion of LMO crystallization covering over 160 My.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
HHMI, University of California, Davis, CA 95616.
During meiosis, each pair of homologous chromosomes becomes connected by at least one crossover, as required for accurate segregation, and adjacent crossovers are widely separated thereby limiting total numbers. In coarsening models, this crossover patterning results from nascent recombination sites competing to accrue a limiting pro-crossover RING-domain protein (COR) that diffuses between synapsed chromosomes. Here, we delineate the localization dynamics of three mammalian CORs in the mouse and determine their interdependencies.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109.
The NASA Mars 2020 Perseverance Rover Mission has collected samples of rock, regolith, and atmosphere within the Noachian-aged Jezero Crater, once the site of a delta-lake system with a high potential for habitability and biosignature preservation. Between sols 109 and 1,088 of the mission, 27 sample tubes have been sealed, including witness tubes. Each sealed sample tube has been collected along with detailed documentation provided by the Perseverance instrument payload, preserving geological and environmental context.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
School of Geographical and Earth Sciences, Gregory Building, University of Glasgow, Glasgow G12 8QQ, Scotland.
Physical materials from planetary bodies are crucial for understanding fundamental processes that constrain the evolution of the solar system, as samples can be analyzed at high precision and accuracy in Earth-based laboratories. Mars is the only planet outside of Earth from which we possess samples in the form of meteorites. Martian meteorites (n > 350) have enabled constraints to be placed on various aspects of the red planet's formation and evolution, notably: that Mars accreted and differentiated rapidly; that the planet has a complex volatile element evolution; and that it has always been volcanically active with a rich and diverse magmatic history.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
Division of Physical Sciences, University of California San Diego, La Jolla, CA 92093-0340.
Proc Natl Acad Sci U S A
January 2025
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA 90095.
The elemental and isotopic abundances of major species in the Martian atmosphere have been determined, but analyses often lack sufficient precision, and those of minor and trace species are frequently not well known. Many important questions about the evolution and current state of Mars require the kind of knowledge that can be gained from analysis of a returned sample of the Martian atmosphere. Key target species include the noble gases, nitrogen, and various species containing carbon, hydrogen, and oxygen, such as methane.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
January 2025
School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FE, United Kingdom.
The Red Planet is a magnetic planet. The Martian crust contains strong magnetization from a core dynamo that likely was active during the Noachian period when the surface may have been habitable. The evolution of the dynamo may have played a central role in the evolution of the early atmosphere and the planet's transition to the current cold and dry state.
View Article and Find Full Text PDFInt Forum Allergy Rhinol
January 2025
Department of Otolaryngology-Head and Neck Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
In this multi-center sinonasal malignancies (SNM) cohort, the Sino-nasal Outcome Test has a correlation with the University of Washington Quality of Life (UWQOL) for assessing QOL. The use of both instruments remains recommended to provide complete and complementary information. Future design of an easy-to-use tool specific to SNM is needed to encompass all aspects of QOL.
View Article and Find Full Text PDFInt Forum Allergy Rhinol
January 2025
Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington, USA.
Background: The present study explores the effect of sociodemographics and comorbidities on the calculated minimal clinically important difference (MCID) for 22-item Sinonasal Outcome Test (SNOT-22) scores in patients with medically treated chronic rhinosinusitis (CRS). The importance of delineating a threshold to indicate clinically meaningful changes perceived by a patient is well acknowledged, yet the influence of patient-specific factors on MCID has not been fully elucidated.
Methods: Patients with CRS (n = 221) presenting to a tertiary care practice reported their change in disease burden with anchor questions following CRS-directed medical treatment.
PLoS Biol
January 2025
Department of Forest and Conservation Sciences, Department of Botany, University of British Columbia, Vancouver, Canada.
The discipline of ecology and evolutionary biology (EEB) has long grappled with issues of inclusivity and representation, particularly for individuals with systematically excluded and marginalized backgrounds or identities. For example, significant representation disparities still persist that disproportionately affect women and gender minorities; Black, Indigenous, and People of Color (BIPOC); individuals with disabilities; and people who are LGBTQIA+. Recent calls for action have urged the EEB community to directly address issues of representation, inclusion, justice, and equity.
View Article and Find Full Text PDFIssues Ment Health Nurs
January 2025
School of Nursing, University of Nevada, Las Vegas, Nevada, USA.
Infant neonatal intensive care unit (NICU) hospitalization increases maternal risk for post-traumatic stress disorder (PTSD) symptoms, which may negatively impact mother-child attachment and infant growth and development. Prior studies have documented positive associations between unmet parenting expectations and adverse maternal psychological outcomes, including post-NICU discharge. However, no studies have yet explored how unmet parenting expectations may be associated with maternal NICU-related PTSD symptoms.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Bioengineering, University of California, Riverside, 900 University Avenue, Riverside, California 92521, United States.
Polymer/ceramic nanocomposites integrated the advantages of both polymers and ceramics for a wide range of biomedical applications, such as bone tissue repair. Here, we reported triphasic poly(lactic--glycolic acid) (PLGA, LA/GA = 90:10) nanocomposites with improved dispersion of hydroxyapatite (HA) and magnesium oxide (MgO) nanoparticles using a process that integrated the benefits of ultrasonic energy and dual asymmetric centrifugal mixing. We characterized the microstructure and composition of the nanocomposites and evaluated the effects of the HA/MgO ratios on degradation behavior and cell-material interactions.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
Department of Chemistry, University of California, Davis, 1 Shields Avenue, Davis, California 95616, United States.
Whereas single crystals of organic compounds that respond to heat or light have been reported and studied in detail, studies on crystalline organic compounds that elicit an extreme mechanical response are relatively rare in the chemical literature. A tetrafluoro(aryl)sulfanylated bicyclopentane synthesized in our laboratory was discovered to exhibit such behavior; i.e.
View Article and Find Full Text PDFBackground: Irritable bowel syndrome (IBS) is influenced by various factors, including socioemotional stressors. The COVID-19 lockdown created a unique environment characterized by reduced social interactions, potentially impacting IBS symptoms.
Aim: To assess how lockdown measures affected symptoms related to the gut-brain axis in IBS patients in Buenos Aires, Argentina.
J Clin Gastroenterol
December 2024
Section of Gastroenterology and Hepatology, Department of Medicine, Baylor College of Medicine, Houston, TX.
Objective: Even though the prevalence of malignancy within gastric ulcers is low, surveillance endoscopy is routinely performed after gastric ulcer diagnosis resulting in unnecessary costs and risks. Endoscopic appearance may be used to identify ulcers with malignant features and guide decisions regarding the need for surveillance endoscopy. Our aim was to assess the predictive value of several endoscopic ulcer features with the risk of prevalent malignancy in patients diagnosed with gastric ulcers.
View Article and Find Full Text PDFAm J Speech Lang Pathol
January 2025
Department of Speech, Language, and Hearing Sciences, The University of Arizona, Tucson.
Purpose: Conversational recasting treatment is generally effective. However, different versions of this treatment and different targets may yield different outcomes for children. Here, we directly compare multiple variations of conversational recasting to determine how modifications to delivery and target impact treatment outcomes.
View Article and Find Full Text PDFJAMA Intern Med
January 2025
Department of Population Medicine, Harvard Pilgrim Health Care Institute, Boston, Massachusetts.
Importance: Doxycycline postexposure prophylaxis (doxyPEP) has been shown to decrease the incidence of bacterial sexually transmitted infections (STIs) among people assigned male sex at birth in clinical trials, but data from clinical practice are limited.
Objective: To describe early uptake of doxyPEP and evaluate changes in STI incidence following doxyPEP initiation.
Design, Setting, And Participants: This retrospective cohort study of adults (aged ≥18 years) dispensed HIV preexposure prophylaxis (PrEP) at Kaiser Permanente Northern California during November 1, 2022, to December 31, 2023, examined electronic health record data to compare HIV PrEP users dispensed and not dispensed doxyPEP and rates of bacterial STIs before and after starting doxyPEP.
JAMA Intern Med
January 2025
San Francisco Department of Public Health, San Francisco, California.
Importance: Increasing rates of sexually transmitted infections (STIs) have been associated with rises in serious morbidity. While doxycycline postexposure prophylaxis (doxyPEP), a strategy in which individuals take doxycycline, 200 mg, after condomless sex to prevent bacterial STIs, has been shown to be efficacious in randomized clinical trials, doxyPEP's potential effect on population-level STI incidence is unknown.
Objective: To assess the association of citywide doxyPEP guideline release with reported chlamydia, gonorrhea, and early syphilis cases in men who have sex with men (MSM) and in transgender women in San Francisco, California.
JAMA Netw Open
January 2025
RAND, Santa Monica, California.
Importance: Despite their importance to patients, health, and industry, the magnitude of investments in drug research and development (R&D) remain nebulous. New policies require more granular and transparent R&D cost estimates to better balance incentives for innovation and returns to developers.
Objective: To estimate per-drug R&D costs using a novel, reproduceable approach and to describe firm-level R&D costs per discrete unit of R&D activity (1 patient-month).
JAMA Intern Med
January 2025
Pulmonary, Critical Care, Allergy, and Sleep Medicine, the University of California, San Francisco.
JAMA Pediatr
January 2025
York University, Toronto, Ontario, Canada.
Hepatol Commun
November 2024
Department of Medicine, University of California, San Diego, La Jolla, California, USA.
Background: Liver fibrosis is caused by chronic toxic or cholestatic liver injury. Fibrosis results from the recruitment of myeloid cells into the injured liver, the release of inflammatory and fibrogenic cytokines, and the activation of myofibroblasts, which secrete extracellular matrix, mostly collagen type I. Hepatic myofibroblasts originate from liver-resident mesenchymal cells, including HSCs and bone marrow-derived CD45+ collagen type I+ expressing fibrocytes.
View Article and Find Full Text PDFPlast Reconstr Surg
January 2025
University of California Irvine and University of California Davis The Aesthetic Centers 3701 Birch St Ste 200, Newport Beach, CA 92660 · Email:
Background: Ideal methods for double eyelid crease creation in Asian upper eyelids remain controversial due to the complexity of Asian upper eyelid anatomies. Key confusions include the underestimation of tarsal height and the septum/aponeurosis fusion point height (FPH), which may underlie the unnaturally high creases in many classic double eyelid procedures.
Methods: A total of 1272 patients had tarsal heights measured.