532 results match your criteria: "The Institute of Statistical Mathematics[Affiliation]"
Rapid Commun Mass Spectrom
July 2025
Human Informatics and Interaction Research Institute, The National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Rationale: Matrix effects by secondary ion mass spectrometry (SIMS) are empirically corrected by calibration using matrix-matched reference materials. However, conventional parametric regression cannot estimate the prediction uncertainty to account for the difference in compositions of new data and reference materials. Applying Gaussian process regression (GPR), a nonparametric probabilistic method, enables the correction for matrix effect while providing quantitative prediction uncertainty.
View Article and Find Full Text PDFBackground: We previously reported that the heart rate (HR) at the time closest to an event or at the last visit during the follow-up period (HR-end) was more closely associated with adverse events (AEs) than baseline HR in patients with non-valvular atrial fibrillation (NVAF). However, it remains uncertain whether changes in HR during the follow-up period or absolute HR values would be more closely associated with AEs. Thus, we performed post hoc analyses using data from the J-RHYTHM Registry.
View Article and Find Full Text PDFClin J Am Soc Nephrol
May 2025
Division of Nephrology, Endocrinology, and Metabolism, Tokai University School of Medicine, Kanagawa, Japan.
Key Points: Sevelamer was associated with lower all-cause mortality compared with calcium-based agents. Sucroferric oxyhydroxide and tenapanor were estimated to rank high in lowering all-cause mortality compared with other phosphate-lowering agents. Sucroferric oxyhydroxide and lanthanum were associated with slower progression of coronary artery calcium score compared with calcium-based agents.
View Article and Find Full Text PDFYonago Acta Med
February 2025
School of Health Science, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan.
Background: In recent years, various psychological interventions have garnered attention as effective support methods to promote self-management and comprehensively understand those with physical and psychological problems associated with knee pain. The purpose of this study was to implement an instructional design (ID) based self-management program for outpatients diagnosed with KOA and to verify the effectiveness of the program.
Methods: In this single-arm uncontrolled before‒after comparative intervention study, 41 subjects diagnosed with symptomatic knee osteoarthritis participated in an intervention program.
J Am Med Dir Assoc
April 2025
Department of Prevention and Care Science, Research Institute, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan; Department of Cognition and Behavior Science, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
Objectives: The increasing number of patients with dementia necessitates the development of rapid and convenient tools to assist with dementia diagnosis. We previously demonstrated the difference in the postural control characteristics during static standing among Alzheimer disease (AD), dementia with Lewy bodies (DLB), and vascular dementia (VaD). In this study, we evaluated the classification accuracy of the postural sway test to assess its capacity to distinguish between types of dementia.
View Article and Find Full Text PDFPLoS One
May 2025
Department of Interdisciplinary Statistical Mathematics, The Institute of Statistical Mathematics, Tachikawa, Tokyo, Japan.
Invasive alien species introduced to ports through cargo containers have destroyed the biodiversity worldwide. The introduction risk at ports must be estimated to control the early stages of invasion. However, limited data are available for this estimation in the introduction stage.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Health Data Science, Graduate School of Data Science, Yokohama City University, Yokohama, Kanagawa, Japan.
Cesarean deliveries are often performed under spinal anesthesia because of the reduced risk of complications compared with that of general anesthesia. However, hypotension frequently occurs and adversely affects both the mother and fetus. Indices, such as the perfusion index (PI) and pleth variability index (PVI), which are derived from pulse oximetry have been used in numerous studies to predict hypotension after spinal anesthesia.
View Article and Find Full Text PDFBMJ Open
December 2024
Division of Nephrology, Department of Internal Medicine, Showa University Graduate School of Medicine, Shinagawa-ku, Tokyo, Japan.
Introduction: Coenzyme Q10 (CoQ10) is a fat-soluble vitamin-like quinone. The plasma levels of CoQ10 are reduced in patients with chronic kidney disease (CKD). CoQ10 supplementation can improve mitochondrial function and decrease oxidative stress in these patients.
View Article and Find Full Text PDFRheumatology (Oxford)
June 2025
Inflammation and Immunology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Objectives: To clarify the differences in clinical phenotypes, therapeutic patterns, and outcomes of patients with granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA) across geographic regions using a multinational cohort.
Methods: Data were collected from patients with newly diagnosed or relapsing GPA or MPA in Europe, Japan and the USA from January to July 2020. The composite outcome of kidney failure and/or death within 52 weeks after treatment was evaluated, and the hazard ratios across the regions were estimated using the Cox proportional hazard model.
J Neurol Sci
January 2025
Department of Clinical Neuroscience and Therapeutics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan; Department of Neurology, Iseikai Hospital, Osaka, Japan.
Background And Aims: We aimed to investigate long-term changes in carotid intima-media thickness (IMT) based on baseline blood pressure (BP) levels in non-cardioembolic stroke patients.
Methods: Patients aged 45-80 years with dyslipidemia who were not on statins before enrollment and had experienced a non-cardioembolic stroke were assigned to either the pravastatin group or the control group in a randomized trial. Patients were classified into three groups according to BP levels: normal BP (N-group: systolic BP [sBP] <140 mmHg and diastolic BP [dBP] <90 mmHg), highly elevated BP (G2 group: sBP ≥160 mmHg or dBP ≥100 mmHg), and mildly elevated BP (G1 group: the remaining patients).
Philos Trans A Math Phys Eng Sci
December 2024
Center for Data Assimilation Research and Applications, Joint Support-Center for Data Science Research, Tachikawa, Japan.
During tsunamis, the interaction between moving seawater and the Earth's magnetic field generates a magnetic field detectable by electromagnetic sensors located on land or on the seafloor. In this study, we introduce new methods for estimating tsunami propagation direction and horizontal velocity fields using tsunami magnetic field data. We derive a transfer function that establishes a relationship between the tsunami magnetic field and the velocity field, emphasizing the alignment between the horizontal magnetic field and the tsunami's propagation direction.
View Article and Find Full Text PDFSci Data
November 2024
National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0047, Japan.
Quasicrystals are solid-state materials that typically exhibit unique symmetries, such as icosahedral or decagonal diffraction symmetry. They were first discovered in 1984. Over the past four decades of quasicrystal research, around 100 stable quasicrystals have been discovered.
View Article and Find Full Text PDFPLoS One
November 2024
Faculty of Medicine, Department of Brain and Neurosciences, Division of Child Neurology, Tottori University, Yonago, Japan.
The relationship between maternal prenatal psychological distress and epilepsy development in offspring has not yet been clarified. Herein, we used a dataset obtained from the Japan Environment and Children's Study, a nationwide birth cohort study, to evaluate the association between six-item Kessler Psychological Distress Scale (K6) scores and epilepsy among 1-3 years old. The data of 97,484 children were retrospectively analyzed.
View Article and Find Full Text PDFBMJ Open
October 2024
Department of Health Data Science, Yokohama City University, Yokohama, Kanagawa, Japan
Introduction: Globally, it is estimated that dietary habits contribute to 22% of adult deaths and 15% of disability-adjusted life years, highlighting the critical role of dietary behaviour in public health. Despite the known benefits of healthy eating, many individuals find it challenging to change their diet for disease prevention. eHealth and mHealth interventions using behaviour change techniques (BCTs) have emerged as promising strategies to address this issue.
View Article and Find Full Text PDFBiom J
October 2024
Department of Biostatistics, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.
Sci Rep
September 2024
Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan.
We have successfully proposed and demonstrated a clustering method that overcomes the "needle-in-a-haystack problem" (finding minuscule important regions from massive spectral image data sets). The needle-in-a-haystack problem is of central importance in the characterization of materials since in bulk materials, the properties of a very tiny region often dominate the entire function. To solve this problem, we propose that rational partitioning of the spectral feature space in which spectra are distributed, or defining of the decision boundaries for clustering, can be performed by focusing on the discrimination limit defined by the measurement noise and partitioning the space at intervals of this limit.
View Article and Find Full Text PDFJ Atheroscler Thromb
February 2025
Graduate School, International University of Health and Welfare.
Aim: In this subanalysis of the EXPAND study, we evaluated the risks and benefits of rivaroxaban plus antiplatelet therapy (APT) for patients with non-valvular atrial fibrillation (NVAF) complicated by stable coronary artery disease (CAD), ischemic stroke, or peripheral artery disease (PAD).
Methods: From the EXPAND study population (n=7,141), patients with NVAF complicated by stable CAD (n=886), ischemic stroke (n=1,231), or PAD (n=160) were included. Patients complicated by any of them were set as ALL (n=2,030).
JMIR Ment Health
September 2024
Department of Health Promotion and Human Behavior, Graduate School of Medicine / School of Public Health, Kyoto University, Kyoto, Japan.
Background: Internet-based cognitive behavioral therapy (iCBT) shows promise in the prevention of depression. However, the specific iCBT components that contribute to its effectiveness remain unclear.
Objective: We aim to evaluate the effects of iCBT components in preventing depression among university students.
Cochrane Database Syst Rev
September 2024
Global Health Nursing, Graduate School of Nursing Science, St. Luke's International University, Tokyo, Japan.
Background: Acute kidney injury (AKI) is characterised by a rapid decline in kidney function and is caused by a variety of clinical conditions. The incidence of AKI in hospitalised adults is high. In animal studies, erythropoiesis-stimulating agents (ESA) have been shown to act as a novel nephroprotective agent against ischaemic, toxic, and septic AKI by inhibiting apoptosis, promoting cell proliferation, and inducing antioxidant and anti-inflammatory responses.
View Article and Find Full Text PDFAlzheimers Dement (N Y)
September 2024
YCU Epilepsy Center Yokohama City University Hospital Yokohama Japan.
Introduction: The use of anti-epileptic drugs (AEDs) in degenerative dementia (DD) remains uncertain. We aimed to evaluate the association of early AED administration with subsequent DD occurrence.
Methods: Using a large nationwide database, we enrolled patients newly diagnosed with epilepsy from 2014 to 2019 ( = 104,225), and using propensity score matching, we divided them into treatment (those prescribed AEDs in 2014) and control groups.
Commun Biol
September 2024
Advanced Neuroimaging Center, National Institutes for Quantum Science and Technology, Chiba, 263-8555, Japan.
Nonhuman primates (NHPs) exhibit complex and diverse behavior that typifies advanced cognitive function and social communication, but quantitative and systematical measure of this natural nonverbal processing has been a technical challenge. Specifically, a method is required to automatically segment time series of behavior into elemental motion motifs, much like finding meaningful words in character strings. Here, we propose a solution called SyntacticMotionParser (SMP), a general-purpose unsupervised behavior parsing algorithm using a nonparametric Bayesian model.
View Article and Find Full Text PDFNat Commun
August 2024
Advanced Neuroimaging Center, National Institutes for Quantum Science and Technology, Chiba, Japan.
Primates must adapt to changing environments by optimizing their behavior to make beneficial choices. At the core of adaptive behavior is the orbitofrontal cortex (OFC) of the brain, which updates choice value through direct experience or knowledge-based inference. Here, we identify distinct neural circuitry underlying these two separate abilities.
View Article and Find Full Text PDFDatabase (Oxford)
August 2024
Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
A structural alteration in copper/zinc superoxide dismutase (SOD1) is one of the common features caused by amyotrophic lateral sclerosis (ALS)-linked mutations. Although a large number of SOD1 variants have been reported in ALS patients, the detailed structural properties of each variant are not well summarized. We present SoDCoD, a database of superoxide dismutase conformational diversity, collecting our comprehensive biochemical analyses of the structural changes in SOD1 caused by ALS-linked gene mutations and other perturbations.
View Article and Find Full Text PDFDiabetol Int
July 2024
Division of Diabetes, Metabolism, and Endocrinology, Department of Internal Medicine, The Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Minato-ku, Tokyo, 105-8641 Japan.
In the large-scale, prospective, observational JDCP study, a total of 5944 people with type 2 diabetes (mean age at baseline, 61.4 years old; women, 39.9%; and duration of diabetes, 10.
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