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Performance validity testing

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https://www.readbyqxmd.com/read/28551711/why-are-most-phospholipidosis-inducers-also-herg-blockers
#1
Svetoslav Slavov, Iva Stoyanova-Slavova, Shuaizhang Li, Jinghua Zhao, Ruili Huang, Menghang Xia, Richard Beger
Recent reports have noted that a number of compounds that block the human Ether-à-go-go related gene (hERG) ion channel also induce phospholipidosis (PLD). To explore a hypothesis explaining why most PLD inducers are also hERG inhibitors, a modeling approach was undertaken with data sets comprised of 4096 compounds assayed for hERG inhibition and 5490 compounds assayed for PLD induction. To eliminate the chemical domain effect, a filtered data set of 567 compounds tested in quantitative high-throughput screening (qHTS) format for both hERG inhibition and PLD induction was constructed...
May 27, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28551709/the-validity-of-a-new-structured-assessment-of-gastrointestinal-symptoms-scale-sagis-for-evaluating-symptoms-in-the-clinical-setting
#2
N A Koloski, M Jones, J Hammer, M von Wulffen, A Shah, H Hoelz, M Kutuyla, D Burger, N Martin, S R Gurusamy, N J Talley, G Holtmann
BACKGROUND: The clinical assessments of patients with gastrointestinal symptoms can be time-consuming, and the symptoms captured during the consultation may be influenced by a variety of patient and non-patient factors. To facilitate standardized symptom assessment in the routine clinical setting, we developed the Structured Assessment of Gastrointestinal Symptom (SAGIS) instrument to precisely characterize symptoms in a routine clinical setting. AIMS: We aimed to validate SAGIS including its reliability, construct and discriminant validity, and utility in the clinical setting...
May 27, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28551584/development-of-a-chronic-sediment-toxicity-test-using-the-benthic-ostracod-heterocypris-incongruens-and-their-application-to-toxicity-assessments-of-urban-road-dust
#3
Wilailuk Niyommaneerat, Fumiyuki Nakajima, Tomohiro Tobino, Kazuo Yamamoto
This study reports on the development and application of a chronic sediment toxicity test using the benthic ostracod Heterocypris incongruens. H. incongruens reproduction parameters such as egg production, first day of brooding, egg-laying ratio, and hatching ratio were examined in this study. The test was first validated by determining the repeatability of the test method under seven control performances. The results showed good test repeatability of most endpoints, with coefficient of variation (CV) results below 15%...
May 25, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28551315/prevalence-of-exercise-addiction-symptomology-and-disordered-eating-in-australian-students-studying-nutrition-and-dietetics
#4
Tetyana Rocks, Fiona Pelly, Gary Slater, Lisa Anne Martin
BACKGROUND: Previous research has reported the existence of disordered eating in students studying nutrition and dietetics. However, the occurrence of exercise addiction, previously linked to disordered eating, is poorly understood in this group. OBJECTIVE: The main objective of this study was to explore the prevalence of self-reported symptoms of exercise addiction and the association with disordered eating in a sample of students studying nutrition and dietetics...
May 25, 2017: Journal of the Academy of Nutrition and Dietetics
https://www.readbyqxmd.com/read/28551243/development-and-validation-of-a-robust-high-performance-liquid-chromatographic-method-for-the-analysis-of-monacolins-in-red-yeast-rice
#5
Mart Theunis, Tania Naessens, Veronique Verhoeven, Nina Hermans, Sandra Apers
A robust analytical method, using reversed phase high-performance liquid chromatography with diode array detection, was developed and validated for the quantification of monacolins in red yeast rice bulk products. Tests on the composition of the extraction solvent, extraction time and the number of repetitions of extraction were evaluated with the aim of complete extraction of the monacolins and minimal transitions between the monacolins during analysis. Monacolin K (acid form), monacolin K (lactone form) and minor monacolin peaks were separated on a C18 column (250×4...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28551149/advanced-predictive-methods-for-wine-age-prediction-part-i-a-comparison-study-of-single-block-regression-approaches-based-on-variable-selection-penalized-regression-latent-variables-and-tree-based-ensemble-methods
#6
Ricardo Rendall, Ana Cristina Pereira, Marco S Reis
In this paper we test and compare advanced predictive approaches for estimating wine age in the context of the production of a high quality fortified wine - Madeira Wine. We consider four different data sets, namely, volatile, polyphenols, organic acids and the UV-vis spectra. Each one of these data sets contain chemical information of a different nature and present diverse data structures, namely a different dimensionality, level of collinearity and degree of sparsity. These different aspects may imply the use of different modelling approaches in order to better explore the data set's information content, namely their predictive potential for wine age...
August 15, 2017: Talanta
https://www.readbyqxmd.com/read/28550762/forensic-age-estimation-by-morphometric-analysis-of-the-manubrium-from-3d-mr-images
#7
Naira P Martínez Vera, Johannes Höller, Thomas Widek, Bernhard Neumayer, Thomas Ehammer, Martin Urschler
Forensic age estimation research based on skeletal structures focuses on patterns of growth and development using different bones. In this work, our aim was to study growth-related evolution of the manubrium in living adolescents and young adults using magnetic resonance imaging (MRI), which is an image acquisition modality that does not involve ionizing radiation. In a first step, individual manubrium and subject features were correlated with age, which confirmed a statistically significant change of manubrium volume (Mvol:p<0...
May 12, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28550611/-18-f-fluorodeoxyglucose-positron-emission-tomography-in-the-diagnosis-of-malignancy-in-patients-with-paraneoplastic-neurological-syndrome-a-systematic-review-and-meta-analysis
#8
REVIEW
Ana María García Vicente, Roberto C Delgado-Bolton, Mariano Amo-Salas, Jesús López-Fidalgo, Ana Paula Caresia Aróztegui, José Ramón García Garzón, Javier Orcajo Rincón, María José García Velloso, María de Arcocha Torres, Soledad Alvárez Ruíz
PURPOSE: The detection of occult cancer in patients suspected of having a paraneoplastic neurological syndrome (PNS) poses a diagnostic challenge. The aim of our study was to perform a systematic review and meta-analysis to assess the diagnostic performance of FDG PET for the detection of occult malignant disease responsible for PNS. METHODS: A systematic review of the literature (MEDLINE, EMBASE, Cochrane, and DARE) was undertaken to identify studies published in any language...
May 27, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28550374/performance-of-an-artificial-multi-observer-deep-neural-network-for-fully-automated-segmentation-of-polycystic-kidneys
#9
Timothy L Kline, Panagiotis Korfiatis, Marie E Edwards, Jaime D Blais, Frank S Czerwiec, Peter C Harris, Bernard F King, Vicente E Torres, Bradley J Erickson
Deep learning techniques are being rapidly applied to medical imaging tasks-from organ and lesion segmentation to tissue and tumor classification. These techniques are becoming the leading algorithmic approaches to solve inherently difficult image processing tasks. Currently, the most critical requirement for successful implementation lies in the need for relatively large datasets that can be used for training the deep learning networks. Based on our initial studies of MR imaging examinations of the kidneys of patients affected by polycystic kidney disease (PKD), we have generated a unique database of imaging data and corresponding reference standard segmentations of polycystic kidneys...
May 26, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/28550020/translation-adaptation-and-validation-of-two-versions-of-the-chronic-liver-disease-questionnaire-in-malaysian-patients-for-speakers-of-both-english-and-malay-languages-a-cross-sectional-study
#10
Shasha Khairullah, Sanjiv Mahadeva
OBJECTIVE: We aimed to adapt, translate and validate the Chronic Liver Disease Questionnaire (CLDQ) in Malaysian patients with chronic liver diseases of various aetiologies. SETTING: Tertiary level teaching institution in Malaysia. PARTICIPANTS: The validation process involved 211 adult patients (English language n=101, Malay language n=110) with chronic liver disease. Characteristics of the study subjects were as follows: mean (SD) age was 56 (12...
May 25, 2017: BMJ Open
https://www.readbyqxmd.com/read/28550019/measuring-ability-to-assess-claims-about-treatment-effects-a-latent-trait-analysis-of-items-from-the-claim-evaluation-tools-database-using-rasch-modelling
#11
Astrid Austvoll-Dahlgren, Øystein Guttersrud, Allen Nsangi, Daniel Semakula, Andrew D Oxman
BACKGROUND: The Claim Evaluation Tools database contains multiple-choice items for measuring people's ability to apply the key concepts they need to know to be able to assess treatment claims. We assessed items from the database using Rasch analysis to develop an outcome measure to be used in two randomised trials in Uganda. Rasch analysis is a form of psychometric testing relying on Item Response Theory. It is a dynamic way of developing outcome measures that are valid and reliable. OBJECTIVES: To assess the validity, reliability and responsiveness of 88 items addressing 22 key concepts using Rasch analysis...
May 25, 2017: BMJ Open
https://www.readbyqxmd.com/read/28549556/evaluation-of-a-commercial-automatic-treatment-planning-system-for-prostate-cancers
#12
Kanabu Nawa, Akihiro Haga, Akihiro Nomoto, Raniel A Sarmiento, Kenshiro Shiraishi, Hideomi Yamashita, Keiichi Nakagawa
Recent developments in Radiation Oncology treatment planning have led to the development of software packages that facilitate automated intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT) planning. Such solutions include site-specific modules, plan library methods, and algorithm-based methods. In this study, the plan quality for prostate cancer generated by the Auto-Planning module of the Pinnacle(3) radiation therapy treatment planning system (v9.10, Fitchburg, WI) is retrospectively evaluated...
May 23, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28548557/further-examination-of-embedded-performance-validity-indicators-for-the-conners-continuous-performance-test-and-brief-test-of-attention-in-a-large-outpatient-clinical-sample
#13
Michael J Sharland, Stephen C Waring, Brian P Johnson, Allise M Taran, Travis A Rusin, Andrew M Pattock, Jeanette A Palcher
OBJECTIVE: Assessing test performance validity is a standard clinical practice and although studies have examined the utility of cognitive/memory measures, few have examined attention measures as indicators of performance validity beyond the Reliable Digit Span. The current study further investigates the classification probability of embedded Performance Validity Tests (PVTs) within the Brief Test of Attention (BTA) and the Conners' Continuous Performance Test (CPT-II), in a large clinical sample...
May 26, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/28547802/the-power-of-exclusion-using-automated-osteometric-sorting-pair-matching
#14
Jeffrey James Lynch, John Byrd, Carrie B LeGarde
This study compares the original pair-matching osteometric sorting model (J Forensic Sci 2003;48:717) against two new models providing validation and performance testing across three samples. The samples include the Forensic Data Bank, USS Oklahoma, and the osteometric sorting reference used within the Defense POW/MIA Accounting Agency. A computer science solution to generating dynamic statistical models across a commingled assemblage is presented. The issue of normality is investigated showing the relative robustness against non-normality and a data transformation to control for normality...
May 26, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28546985/pregnant-women-s-preferences-for-mode-of-delivery-questionnaire-psychometric-properties
#15
Fereshteh Zamani-Alavijeh, Parvin Shahry, Maryam Kalhori, Marzieh Araban
INTRODUCTION: The rate of caesarean delivery is increasing worldwide. Maternal beliefs may be influential on the mode of delivery. This study aimed to validate pregnant women's preferences for mode of delivery questionnaire among pregnant women. MATERIALS AND METHODS: This was a cross-sectional study which was done in Ahvaz Public and Private Health Care Centers. A total of 342 low-risk pregnant women were included in a study conducted in spring 2011 in Ahvaz, Iran...
2017: Journal of Education and Health Promotion
https://www.readbyqxmd.com/read/28546139/cognitive-testing-in-people-at-increased-risk-of-dementia-using-a-smartphone-app-the-ivitality-proof-of-principle-study
#16
Susan Jongstra, Liselotte Willemijn Wijsman, Ricardo Cachucho, Marieke Peternella Hoevenaar-Blom, Simon Pieter Mooijaart, Edo Richard
BACKGROUND: Smartphone-assisted technologies potentially provide the opportunity for large-scale, long-term, repeated monitoring of cognitive functioning at home. OBJECTIVE: The aim of this proof-of-principle study was to evaluate the feasibility and validity of performing cognitive tests in people at increased risk of dementia using smartphone-based technology during a 6 months follow-up period. METHODS: We used the smartphone-based app iVitality to evaluate five cognitive tests based on conventional neuropsychological tests (Memory-Word, Trail Making, Stroop, Reaction Time, and Letter-N-Back) in healthy adults...
May 25, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28545948/numerical-investigation-of-mist-air-impingement-cooling-on-ribbed-blade-leading-edge-surface
#17
Qingfei Bian, Jin Wang, Yi-Tung Chen, Qiuwang Wang, Min Zeng
The working gas turbine blades are exposed to the environment of high temperature, especially in the leading-edge region. The mist/air two-phase impingement cooling has been adopted to enhance the heat transfer on blade surfaces and investigate the leading-edge cooling effectiveness. An Euler-Lagrange particle tracking method is used to simulate the two-phase impingement cooling on the blade leading-edge. The mesh dependency test has been carried out and the numerical method is validated based on the available experimental data of mist/air cooling with jet impingement on a concave surface...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28545763/13-ribs-as-a-predictor-of-long-gap-esophageal-atresia-myth-or-reality-analysis-of-associated-findings-of-esophageal-atresia-and-abnormal-rib-count
#18
Jonathan Durell, Haitham Dagash, Bala Eradi, Ashok Rajimwale, Shawqui Nour, Nitin Patwardhan
BACKGROUND: The presence of 13 pairs of ribs on pre-operative chest x-ray has been postulated to be an indicator for long gap esophageal atresia (EA). This study sought to determine the validity of this theory and identify associated pathological conditions in patients with EA and abnormal rib count. METHODS: Babies with EA from January 2005 - December 2012 were retrospectively analyzed. Information was gathered from neonatal health records and operation notes. Chest x-rays were reviewed to determine rib count...
May 2, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28545471/decisional-balance-inventory-dbi-adolescent-form-for-smoking-psychometric-properties-of-the-persian-version
#19
Maryam Khazaee-Pool, Tahereh Pashaei, Ponnet Koen, Fatemeh Jafari, Rashin Alizadeh
BACKGROUND: One effective model for studying cigarette smoking cessation is the transtheoretical model (TTM). In order to assess to what degree interventions can make variations in individuals' behavior, several questionnaires have been developed based on the TTM. This study aims to describe the development of the Persian version of the Decisional Balance Inventory (DBI) for smoking cessation in Iran and to evaluate its psychometric properties. DESIGN AND METHODS: The forward-backward technique was used to translate the DBI from English into Persian...
May 25, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28545168/reliability-of-the-triple-timed-up-and-go-3tug-test
#20
Donald B Sanders, Jeffrey T Guptill, Kathy L Aleš, Lisa D Hobson-Webb, David P Jacobus, Riaz Mahmood, Janice M Massey, Melissa M Pittman, Kristi Prather, Shruti M Raja, Eric Yow, Vern C Juel
INTRODUCTION: We report the reliability of a new measure, the Triple Timed-Up-and-Go (3TUG) test, for assessing clinical function in patients with Lambert-Eaton myasthenia (LEM). METHODS: Intra-rater reproducibility and inter-rater agreement of the 3TUG were assessed in 25 control subjects, 24 patients with non-LEM neuromuscular disease and 12 LEM patients. The coverage probability (CP) method was the primary measure of reproducibility and agreement. The a priori acceptable range was <20% difference in 3TUG times and a CP ≥0...
May 25, 2017: Muscle & Nerve
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