2,758 results match your criteria parametric testing


Beverage characteristics perceived as "healthy" among Hispanic and African American parents of young children.

J Acad Nutr Diet 2022 Jan 10. Epub 2022 Jan 10.

Assistant Professor, Department of Exercise and Nutrition Sciences, Milken Institute School of Public Health, The George Washington University, 950 New Hampshire Avenue NW, Suite 200, Washington, DC 20052.

Background: It is recommended that children under 6 years old avoid sugar-sweetened beverages (SSBs), yet 25% of toddlers and 45% of preschool-aged children consume SSBs on a given day, with the highest intakes reported among Hispanic and African American children.

Objective: To investigate characteristics that predominantly low-income Hispanic and African American parents perceive to reflect a healthy beverage, and examine the influence of these characteristics on parents' perceptions of the beverages they provide to their young children.

Design: This study consisted of two activities: a qualitative activity where parents (n=102) were asked to report what characteristics they perceive to reflect a healthy beverage and a quantitative activity where parents (n=96) indicated the extent to which each of the reported characteristics influence parents' perceptions of the beverages they provide to their young children. Read More

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January 2022

A random forest model for forecasting regional COVID-19 cases utilizing reproduction number estimates and demographic data.

Chaos Solitons Fractals 2022 Jan 5:111779. Epub 2022 Jan 5.

Department of Computer Science #50, University of Dallas Irving, TX 75062 USA.

During the COVID-19 pandemic, predicting case spikes at the local level is important for a precise, targeted public health response and is generally done with compartmental models. The performance of compartmental models is highly dependent on the accuracy of their assumptions about disease dynamics within a population; thus, such models are susceptible to human error, unexpected events, or unknown characteristics of a novel infectious agent like COVID-19. We present a relatively non-parametric random forest model that forecasts the number of COVID-19 cases at the U. Read More

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January 2022

COVID-19-Related Concerns and Symptoms of Anxiety: Does Concern Play a Role in Predicting Severity and Risk?

Cureus 2021 Nov 29;13(11):e19999. Epub 2021 Nov 29.

Department of Psychiatry, University of Ottawa, Ottawa, CAN.

Objective Rates of anxiety have increased during the coronavirus disease 2019 (COVID-19) pandemic, partially attributable to the experience of COVID-19 related concerns. It remains pivotal to determine the implications of such concerns on the severity of anxiety as they may represent opportune targets for public health preventative or therapeutic efforts. The current study evaluated COVID-19 related concerns as predictors of anxiety symptom severity. Read More

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November 2021

On the Performance of Semi- and Nonparametric Item Response Functions in Computer Adaptive Tests.

Educ Psychol Meas 2022 Feb 18;82(1):57-75. Epub 2021 May 18.

Fordham University, Bronx, NY, USA.

Large-scale assessments often use a computer adaptive test (CAT) for selection of items and for scoring respondents. Such tests often assume a parametric form for the relationship between item responses and the underlying construct. Although semi- and nonparametric response functions could be used, there is scant research on their performance in a CAT. Read More

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February 2022

Modelling trends of CD4 counts for patients on antiretroviral therapy (ART): a comprehensive health care clinic in Nairobi, Kenya.

BMC Infect Dis 2022 Jan 4;22(1):29. Epub 2022 Jan 4.

Kenya Medical Research Institute, P.O BOX 54840, 00200, Nairobi, Kenya.

Background: In resource-limited settings, changes in CD4 counts constitute an important component in patient monitoring and evaluation of treatment response as these patients do not have access to routine viral load testing. In this study, we quantified trends on CD4 counts in patients on highly active antiretroviral therapy (HAART) in a comprehensive health care clinic in Kenya between 2011 and 2017. We evaluated the rate of change in CD4 cell count in response to antiretroviral treatment. Read More

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January 2022

Repeat two-stage exchange arthroplasty for recurrent periprosthetic hip or knee infection: what are the chances for success?

Arch Orthop Trauma Surg 2022 Jan 4. Epub 2022 Jan 4.

Department of Orthopedics and Tumor Orthopedics, Muenster University Hospital, Muenster, Albert-Schweitzer-Campus 1, 48149, Muenster, Germany.

Introduction: Two-stage revision is a frequently chosen approach to treat chronic periprosthetic joint infection (PJI). However, management of recurrent infection after a two-stage exchange remains debated and the outcome of a repeat two-stage procedure is unclear. This study investigates the success rates of repeat two-stage exchange arthroplasty and analyzes possible risk factors for failure. Read More

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January 2022

The Impact of Ischemia Assessed by Magnetic Resonance on Functional, Arrhythmic, and Imaging Features of Hypertrophic Cardiomyopathy.

Front Cardiovasc Med 2021 17;8:761860. Epub 2021 Dec 17.

Inherited Cardiac Disease Unit, Bart's Heart Centre, St Bartholomew's Hospital, London, United Kingdom.

The aim of the study is to investigate the association between the degree of ischemia due to coronary microvascular dysfunction (CMD) and the left ventricular (LV) tissue characteristics, systolic performance, and clinical manifestations in hypertrophic cardiomyopathy (HCM). This prospective study enrolled 75 patients with HCM without obstructive epicardial coronary artery disease. Each patient underwent cardiovascular magnetic resonance (CMR) including parametric mapping, perfusion imaging during regadenoson-induced hyperemia, late gadolinium enhancement (LGE) and three-dimensional longitudinal, circumferential, and radial strains analysis. Read More

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December 2021

Voxel-wise prediction of recurrent high grade glioma via proximity estimation coupled multi-dimensional SVM.

Int J Radiat Oncol Biol Phys 2021 Dec 26. Epub 2021 Dec 26.

Department of Radiation Oncology, Keck School of Medicine of USC, Los Angeles, USA. Electronic address:

Purposes: To provide early and localized glioblastoma (GBM) recurrence prediction, we introduce a novel post-surgery multi-parametric MR-based support vector machine (SVM) method coupling with stem cell niches (SCN) proximity estimation.

Methods: This study utilized post-surgery MRI scans ∼2 months before clinically diagnosed recurrence from 50 patients with recurrent GBM. The main prediction pipeline consists of a proximity-based estimator to identify regions with high risks of recurrence (HRR), and an SVM classifier to provide voxel-wise prediction in HRR. Read More

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December 2021

Forecasting water quality parameters using artificial neural network for irrigation purposes.

Sci Rep 2021 12 24;11(1):24438. Epub 2021 Dec 24.

Department of Agricultural and Bioresources Engineering, Nnamdi Azikiwe University, Awka, Nigeria.

This study was aimed at analyzing the water quality of Ele River Nnewi, Anambra State for irrigation purposes with a view to predicting a one-year water quality index using Artificial Neural Network (ANN). Water pollution has posed a major problem and identifying the points of pollution in the River system is a very difficult task. To overcome this task, the need to determine the pollution level arose by modeling and predicting four water quality parameters at four (4) different locations using the Artificial Neural Network. Read More

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December 2021

Weekend Admissions Associated with Increased Length of Stay for Children Undergoing Cholecystectomy.

JSLS 2021 Oct-Dec;25(4)

Department of Surgery, New York Medical College, Westchester Medical Center, Valhalla, NY.

Background And Objectives: Prior research shows an association between increased length of stay (LOS) and weekend surgical admissions, but none have looked at this relationship in children undergoing nonelective cholecystectomy for benign noncongenital biliary disease. We investigated whether weekend admissions lead to a longer LOS in this patient population.

Methods: The Statewide Planning and Research Cooperative System database was queried for children ≤ 17 years undergoing cholecystectomy in New York State between January 1, 2009 and December 31, 2012. Read More

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December 2021

Investigation on the Performance of Partial Penetration Welds in Multicell Concrete Filled Steel Tubes.

Materials (Basel) 2021 Dec 8;14(24). Epub 2021 Dec 8.

School of Civil Engineering, Tongji University, Shanghai 200092, China.

This paper presents an experimental and analytical investigation on the performance of partial penetration welds used to adjoin steel plates in irregular shaped multicell concrete filled steel tubes. The experimental program of this study is designed based on an actual implementation of such members as mega columns in a super high rise building in China. A total of six specimens are designed with different plate arrangements for the purpose of testing the performance of the partial penetration welds at different locations of the specimen. Read More

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December 2021

FaDA: A web application for regular laboratory data analyses.

PLoS One 2021 20;16(12):e0261083. Epub 2021 Dec 20.

Nantes Université, CHU Nantes, Inserm, Centre de Recherche en Transplantation et Immunologie (CRTI), UMR 1064, ITUN, Nantes, France.

Web-based data analysis and visualization tools are mostly designed for specific purposes, such as the analysis of data from whole transcriptome RNA sequencing or single-cell RNA sequencing. However, generic tools designed for the analysis of common laboratory data for noncomputational scientists are also needed. The importance of such web-based tools is emphasized by the continuing increases in the sample capacity of conventional laboratory tools such as quantitative PCR, flow cytometry or ELISA instruments. Read More

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January 2022

Providing Evidence for the Null Hypothesis in Functional Magnetic Resonance Imaging Using Group-Level Bayesian Inference.

Front Neuroinform 2021 2;15:738342. Epub 2021 Dec 2.

N. P. Bechtereva Institute of the Human Brain, Russian Academy of Sciences, Saint Petersburg, Russia.

Classical null hypothesis significance testing is limited to the rejection of the point-null hypothesis; it does not allow the interpretation of non-significant results. This leads to a bias against the null hypothesis. Herein, we discuss statistical approaches to 'null effect' assessment focusing on the Bayesian parameter inference (BPI). Read More

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December 2021

Cluster-level statistical inference in fMRI datasets: The unexpected behavior of random fields in high dimensions.

Magn Reson Imaging 2021 Dec 15;87:19-31. Epub 2021 Dec 15.

Institute for the Developing Mind, Children's Hospital Los Angeles, CA 90027, USA; Department of Psychiatry, Keck School of Medicine at the University of Southern California, Los Angeles, CA 90033, USA.

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December 2021

Does meconium contaminated amniotic fluid affect intestinal wall thickness and functional outcome in patients with anterior abdominal wall defects?

Afr J Paediatr Surg 2022 Jan-Mar;19(1):46-51

Department of Surgery, Division of Pediatric Surgery, University Ulm Medical Centre, Eythstrasse, Ulm, Germany.

Background: Gastroschisis (GS) and omphalocele (OC) are congenital abdominal wall defects, the main difference between is the direct exposure of intestinal loops in amniotic fluid in children with a GS. This leads to a reduced primary closure rate and a higher number of intraoperative abnormalities and post-operative complications.

Aims And Objectives: We analysed abdominal wall defect patients over an 11-year period, aiming to assess the influence of meconium-contaminated amniotic fluid. Read More

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December 2021

Exploration of a Multi-Parameter Technology for Pain Assessment in Postoperative Patients After Cardiac Surgery in the Intensive Care Unit: The Nociception Level Index (NOL).

J Pain Res 2021 7;14:3723-3731. Epub 2021 Dec 7.

Department of Anesthesiology and Pain Medicine, Maisonneuve-Rosemont Hospital - CIUSSS de l'Est-de-l'Île-de-Montréal - Université de Montréal, Montreal, QC, Canada.

Introduction: The aim of this study was to explore the use of a multi-parameter technology, the Nociception Level (NOL) index (Medasense Biometrics Ltd, Ramat Gan, Israel), for pain assessment in postoperative awake patients after cardiac surgery during non-nociceptive and nociceptive procedures in the intensive care unit (ICU).

Materials And Methods: A prospective cohort repeated-measures design was used. Patients were included if they were in the ICU after undergoing cardiac surgery and if they could self-report their pain. Read More

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December 2021

Texture and shape analysis of diffusion-weighted imaging for thyroid nodules classification using machine learning.

Med Phys 2021 Dec 9. Epub 2021 Dec 9.

BioImaging Laboratory, Department of Bioengineering, University of Louisville, Louisville, Kentucky, USA.

Purpose: To assess whether the integration between (a) functional imaging features that will be extracted from diffusion-weighted imaging (DWI); and (b) shape and texture imaging features as well as volumetric features that will be extracted from T2-weighted magnetic resonance imaging (MRI) can noninvasively improve the diagnostic accuracy of thyroid nodules classification.

Patients And Methods: In a retrospective study of 55 patients with pathologically proven thyroid nodules, T2-weighted and diffusion-weighted MRI scans of the thyroid gland were acquired. Spatial maps of the apparent diffusion coefficient (ADC) were reconstructed in all cases. Read More

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December 2021

Cannabis Use, Schizotypy and Kamin Blocking Performance.

Front Psychiatry 2021 23;12:633476. Epub 2021 Nov 23.

Medical Education Unit, School of Medicine, University College Cork, Cork, Ireland.

Cannabis use has been associated with increased risk for a first episode of psychosis and inappropriate assignment of salience to extraneous stimuli has been proposed as a mechanism underlying this association. Psychosis-prone (especially schizotypal) personality traits are associated with deficits in associative learning tasks that measure salience allocation. The aim of this study was to examine the relationship between history of cannabis use and Kamin blocking (KB), a form of selective associative learning, in a non-clinical sample. Read More

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November 2021

A class of two-sample nonparametric statistics for binary and time-to-event outcomes.

Stat Methods Med Res 2021 Dec 6:9622802211048030. Epub 2021 Dec 6.

Department of Statistics and Operations Research, 16767Universitat Politècnica de Catalunya, Barcelona, Spain.

We propose a class of two-sample statistics for testing the equality of proportions and the equality of survival functions. We build our proposal on a weighted combination of a score test for the difference in proportions and a weighted Kaplan-Meier statistic-based test for the difference of survival functions. The proposed statistics are fully non-parametric and do not rely on the proportional hazards assumption for the survival outcome. Read More

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December 2021

Diagnosis of Breast Cancer Using Radiomics Models Built Based on Dynamic Contrast Enhanced MRI Combined With Mammography.

Front Oncol 2021 17;11:774248. Epub 2021 Nov 17.

Department of Radiological Sciences, University of California, Irvine, Irvine, CA, United States.

Objective: To build radiomics models using features extracted from DCE-MRI and mammography for diagnosis of breast cancer.

Materials And Methods: 266 patients receiving MRI and mammography, who had well-enhanced lesions on MRI and histologically confirmed diagnosis were analyzed. Training dataset had 146 malignant and 56 benign, and testing dataset had 48 malignant and 18 benign lesions. Read More

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November 2021

Inhibition of the immunoproteasome LMP2 ameliorates ischemia/hypoxia-induced blood-brain barrier injury through the Wnt/β-catenin signalling pathway.

Mil Med Res 2021 Dec 3;8(1):62. Epub 2021 Dec 3.

Department of Neurology, Fujian Provincial Hospital, Shengli Clinical Medical College of Fujian Medical University, No. 134, Dongjie, Gulou District, Fuzhou, 350001, Fujian, China.

Background: Disruption of the blood-brain barrier (BBB) after a stroke can lead to brain injury and neurological impairment. Previous work confirmed the involvement of the immunoproteasome subunit of low molecular mass peptide 2 (LMP2) in the pathophysiology of ischemia stroke. However, the relationship between the immunoproteasome LMP2 and the BBB remains unclear. Read More

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December 2021

Gradient coil and radiofrequency induced heating of orthopaedic implants in MRI: influencing factors.

Phys Med Biol 2021 Dec 23;66(24). Epub 2021 Dec 23.

Istituto Nazionale di Ricerca Metrologica, Str. delle Cacce, 91, I-10135 Torino TO, Italy.

Patients with implanted orthopaedic devices represent a growing number of subjects undergoing magnetic resonance imaging (MRI) scans each year. MRI safety labelling is required for all implants under the EU Medical Device Regulations to ensure regulatory compliance, with each device assessed through standardised testing procedures. In this paper, we employ parametric studies to assess a range of clinically relevant factors that cause tissue heating, performing simulations with both radiofrequency (RF) and gradient coil (GC) switching fields, the latter of which is often overlooked in the literature. Read More

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December 2021

Multi-parametric evaluation of ocular surface disorders during healing process of viral conjunctivitis.

Int Ophthalmol 2021 Nov 29. Epub 2021 Nov 29.

Department of Ophthalmology, Ege University Medicine Faculty, Izmir, Turkey.

Purpose To evaluate the ocular surface properties in epidemic keratoconjunctivitis (EKC) patients during healing process, and to detect the damage on conjunctival goblet cells. Methods Bilateral EKC patients confirmed with polymerase chain reaction (PCR) testing were included. Firstly (Group 1) and secondly (Group 2) affected eyes were compared. Read More

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November 2021

Development, testing, and feasibility of a customized mobile application for obstructive sleep apnea (OSA) risk assessment: A hospital-based pilot study.

J Oral Biol Craniofac Res 2022 Jan-Feb;12(1):109-115. Epub 2021 Nov 11.

Public Health Dentistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, 110025, India.

Introduction: Obstructive Sleep Apnea (OSA), the most prevalent form of sleep-related breathing disorder has practical and financial limitations in diagnosis by polysomnography, hence OSA risk-assessment can identify OSA-related symptoms early.

Objectives: To develop a mobile application for OSA-risk assessment and tests its validity, feasibility, and application in a hospital-based pilot sample.

Study Design And Methods: The study comprised of two parts. Read More

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November 2021

Evaluation of five widely used serologic assays for antibodies to SARS-CoV-2.

Diagn Microbiol Infect Dis 2022 Feb 29;102(2):115587. Epub 2021 Oct 29.

SYNLAB Academy, Mannheim, Germany; Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz; Medical Clinic V, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany. Electronic address:

Reliable diagnostic technologies are pivotal to the fight against COVID-19. While real-time reverse transcription-polymerase chain reaction (rRT-PCR) remains the gold standard, commercial assays for antibodies against (SARS-CoV-2) have emerged. We sought to examine 5 widely used commercial methods. Read More

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February 2022

Randomized non-inferiority TrIal comParing reverse T And Protrusion versus double-kissing and crush Stenting for the treatment of complex left main bifurcation lesions.

Clin Res Cardiol 2021 Nov 24. Epub 2021 Nov 24.

Department of Cardiology, University Medical Center Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.

Background: The treatment of left main bifurcation stenoses remains challenging.

Aims: We compare the "Reverse T and Protrusion" (reverse-TAP) technique to Double-Kissing and crush (DK-crush).

Methods: The study was designed as non-inferiority trial, the primary endpoint was percentage stent expansion in the ostial side branch at optical coherence tomography. Read More

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November 2021

A reinforcement learning model to inform optimal decision paths for HIV elimination.

Math Biosci Eng 2021 09;18(6):7666-7684

Mechanical and Industrial Engineering Department, University of Massachusetts Amherst, Amherst, MA 01003, USA.

The 'Ending the HIV Epidemic (EHE)' national plan aims to reduce annual HIV incidence in the United States from 38,000 in 2015 to 9300 by 2025 and 3300 by 2030. Diagnosis and treatment are two most effective interventions, and thus, identifying corresponding optimal combinations of testing and retention-in-care rates would help inform implementation of relevant programs. Considering the dynamic and stochastic complexity of the disease and the time dynamics of decision-making, solving for optimal combinations using commonly used methods of parametric optimization or exhaustive evaluation of pre-selected options are infeasible. Read More

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September 2021

Multi-parametric cardiovascular magnetic resonance with regadenoson stress perfusion is safe following pediatric heart transplantation and identifies history of rejection and cardiac allograft vasculopathy.

J Cardiovasc Magn Reson 2021 11 22;23(1):135. Epub 2021 Nov 22.

Department of Cardiology, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, USA.

Background: The progressive risk of graft failure in pediatric heart transplantation (PHT) necessitates close surveillance for rejection and coronary allograft vasculopathy (CAV). The current gold standard of surveillance via invasive coronary angiography is costly, imperfect and associated with complications. Our goal was to assess the safety and feasibility of a comprehensive multi-parametric CMR protocol with regadenoson stress perfusion in PHT and evaluate for associations with clinical history of rejection and CAV. Read More

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November 2021

How Interpersonal Psychotherapy Changes the Brain: A Study of fMRI in Borderline Personality Disorder.

J Clin Psychiatry 2021 11 16;83(1). Epub 2021 Nov 16.

Center for Personality Disorders, Department of Neuroscience, University of Turin, Turin, Italy.

Recent guidelines and systematic reviews suggest that disorder-specific psychotherapeutic interventions are the first choice in the treatment of borderline personality disorder (BPD). The aim of this study is to examine brain activity changes in BPD patients () who received a revised BPD-adapted interpersonal psychotherapy (IPT-BPD-R) compared with patients on the waiting list.

Forty-three patients with a BPD diagnosis () were randomly assigned to IPT-BPD-R (n = 22 patients) or the waiting list with clinical management (n = 21 patients) for 10 months. Read More

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November 2021

BI-RADS Reading of Non-Mass Lesions on DCE-MRI and Differential Diagnosis Performed by Radiomics and Deep Learning.

Front Oncol 2021 1;11:728224. Epub 2021 Nov 1.

Department of Radiological Sciences, University of California, Irvine, Irvine, CA, United States.

Background: A wide variety of benign and malignant processes can manifest as non-mass enhancement (NME) in breast MRI. Compared to mass lesions, there are no distinct features that can be used for differential diagnosis. The purpose is to use the BI-RADS descriptors and models developed using radiomics and deep learning to distinguish benign from malignant NME lesions. Read More

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November 2021