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Performance validity tests

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https://www.readbyqxmd.com/read/29161720/development-of-ostqol-a-measure-of-quality-of-life-for-patients-in-opioid-substitution-treatment
#1
Lisa Strada, Gabriele Helga Franke, Bernd Schulte, Jens Reimer, Uwe Verthein
BACKGROUND: Quality of life (QOL) of patients in opioid substitution treatment (OST) is increasingly being addressed in research. However, no disease- or treatment-specific instrument is available to assess the QOL of this target population. The purpose of this project was to develop the first QOL instrument for OST patients. METHODS: Focus groups with 60 OST patients were analyzed using thematic analysis to elicit key QOL themes as perceived by patients. Identified themes were developed into items and refined through pilot testing and cognitive debriefing...
November 21, 2017: European Addiction Research
https://www.readbyqxmd.com/read/29161572/new-%C3%AE-galactosidase-producers-with-potential-for-prebiotic-synthesis
#2
Sara C Silvério, Eugénia A Macedo, José A Teixeira, Lígia R Rodrigues
β-Galactosidases (EC 3.2.1.23) are interesting enzymes with potential application in the pharmaceutical and food industry. In this work, a screening study was carried out to identify new fungal sources of β-galactosidase. A total of 50 fungi were evaluated using a chromogenic test performed in agar plates. The most promising microorganisms were validated as effective β-galactosidase producers under submerged fermentation conditions. The crude β-galactosidases were characterized regarding their optimal pH (3...
November 15, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29161350/embedded-performance-validity-tests-in-the-hopkins-verbal-learning-test-revised-and-the-brief-visuospatial-memory-test-revised-a-replication-study
#3
K Chase Bailey, Jason R Soble, Kathleen M Bain, Chrystal Fullen
Objective: Embedded performance validity tests (PVTs) within the Hopkins Verbal Learning Test-Revised (HVLT-R) and Brief Visuospatial Memory Test-Revised (BVMT-R) were recently identified. This study aimed to further validate/replicate these embedded PVTs. Method: Eighty clinically referred veterans who underwent neuropsychological evaluation were included. Validity groups were established by passing/failing 2-3 well-validated PVTs, with 75% (n = 60) classified as valid and 25% (n = 20) noncredible...
November 17, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29161264/proprioceptive-assessment-in-clinical-settings-evaluation-of-joint-position-sense-in-upper-limb-post-stroke-using-a-robotic-manipulator
#4
Sara Contu, Asif Hussain, Simone Kager, Aamani Budhota, Vishwanath A Deshmukh, Christopher W K Kuah, Lester H L Yam, Liming Xiang, Karen S G Chua, Lorenzo Masia, Domenico Campolo
Proprioception is a critical component for motor functions and directly affects motor learning after neurological injuries. Conventional methods for its assessment are generally ordinal in nature and hence lack sensitivity. Robotic devices designed to promote sensorimotor learning can potentially provide quantitative precise, accurate, and reliable assessments of sensory impairments. In this paper, we investigate the clinical applicability and validity of using a planar 2 degrees of freedom robot to quantitatively assess proprioceptive deficits in post-stroke participants...
2017: PloS One
https://www.readbyqxmd.com/read/29160800/study-and-validation-of-eavesdropping-scenarios-over-a-visible-light-communication-channel
#5
Ignacio Marin-Garcia, Victor Guerra, Rafael Perez-Jimenez
The security and privacy provided by Visible Light Communication (VLC) technologies is an area that has been slightly addressed due to the misconception that, since light does not go through solid objects like walls, VLC-based communications cannot be eavesdropped on by outside observers. As an upcoming technology, VLC is expected to be used in multiple environments were, due to radio frequency RF overuse or limitations, RF solutions cannot or should not be employed. In this work, we study the eavesdropping characteristics of a VLC-based communication...
November 21, 2017: Sensors
https://www.readbyqxmd.com/read/29160616/evaluation-of-microtitre-plate-based-haemoglobin-estimation
#6
A P Shah, P T Patel, B P Patel, K K Mishra, K Ghosh
INTRODUCTION: Haemoglobin estimation is one of the most important clinical investigations. Many techniques are available to measure haemoglobin; still there is a need for a haemoglobin assay technique which is cheap, robust and simple and can be used in field conditions very quickly using figure prick sample. We evaluated a cyanmethaemoglobin-based haemoglobin estimation using a microtitre plates for the purpose. METHODS: Microtitre plate-based haemoglobin estimation was developed using cyanmethaemoglobin-based assay and was compared with standard haematology analyser-based haemoglobin estimation in a large number of samples from a population of voluntary blood donors...
November 21, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29160432/hypertriglyceridemic-waist-phenotype-and-nutritional-factors-a-study-with-participants-of-elsa-brasil
#7
Juliana Rodrigues de Andrade, Gustavo Velasquez-Melendez, Sandhi Maria Barreto, Taísa Sabrina Silva Pereira, José Geraldo Mill, Maria Del Carmen Bisi Molina
OBJECTIVE: To investigate the association between fat and fiber intakes and the hypertriglyceridemic waist phenotype (HWP). METHODS: Cross-sectional survey conducted from the baseline of Brazilian Longitudinal Study of Health Adult (ELSA-Brasil). Anthropometric measurements were conducted and the body mass index was calculated (BMI). Participants were classified according to the presence of HWP when waist circumference ≥ 102 and ≥ 88 cm, respectively, in men and women, and triglycerides ≥ 150 mg/dL...
July 2017: Revista Brasileira de Epidemiologia, Brazilian Journal of Epidemiology
https://www.readbyqxmd.com/read/29160145/the-graded-and-redefined-assessment-of-strength-sensibility-and-prehension-grassp-version-2-provides-interval-measure-properties
#8
Inge-Marie Velstra, Carolina Saskia Fellinghauer, Rainer Frank Abel, Sukhvinder Kalsi-Ryan, Rüdiger Rupp, Armin Curt
The GRASSP is a valid, reliable and responsive outcome measure to evaluate upper limb function in individuals with tetraplegia. GRASSP generates ordinal total scores; thus, applicability as an interval level measurement requires testing of its measurement properties. Therefore, this study examined the metric characteristics with Rasch analysis to derive interval level scales of the respective GRASSP subtests. The GRASSP was recorded within 10 days, at 1, 3, 6 and 12 months after cervical spinal cord injury (SCI)...
November 21, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29160020/comparison-of-quantitative-regional-ventilation-weighted-fourier-decomposition-mri-with-dynamic-fluorinated-gas-washout-mri-and-lung-function-testing-in-copd-patients
#9
Till F Kaireit, Marcel Gutberlet, Andreas Voskrebenzev, Julia Freise, Tobias Welte, Jens M Hohlfeld, Frank Wacker, Jens Vogel-Claussen
BACKGROUND: Ventilation-weighted Fourier decomposition-MRI (FD-MRI) has matured as a reliable technique for quantitative measures of regional lung ventilation in recent years, but has yet not been validated in COPD patients. PURPOSE/HYPOTHESIS: To compare regional fractional lung ventilation obtained by ventilation-weighted FD-MRI with dynamic fluorinated gas washout MRI ((19) F-MRI) and lung function test parameters. STUDY TYPE: Prospective study...
November 21, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29159706/alcoholism-detection-by-data-augmentation-and-convolutional-neural-network-with-stochastic-pooling
#10
Shui-Hua Wang, Yi-Ding Lv, Yuxiu Sui, Shuai Liu, Su-Jing Wang, Yu-Dong Zhang
Alcohol use disorder (AUD) is an important brain disease. It alters the brain structure. Recently, scholars tend to use computer vision based techniques to detect AUD. We collected 235 subjects, 114 alcoholic and 121 non-alcoholic. Among the 235 image, 100 images were used as training set, and data augmentation method was used. The rest 135 images were used as test set. Further, we chose the latest powerful technique-convolutional neural network (CNN) based on convolutional layer, rectified linear unit layer, pooling layer, fully connected layer, and softmax layer...
November 17, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29159418/reliability-and-convergent-validity-of-the-five-step-test-in-people-with-chronic-stroke
#11
Shamay S M Ng, Mimi M Y Tse, Eric W C Tam, Cynthia Y Y Lai
OBJECTIVES: (i) To estimate the intra-rater, inter-rater and test-retest reliabilities of the Five-Step Test (FST), as well as the minimum detectable change in FST completion times in people with stroke. (ii) To estimate the convergent validity of the FST with other measures of stroke-specific impairments. (iii) To identify the best cut-off times for distinguishing FST performance in people with stroke from that of healthy older adults. DESIGN: A cross-sectional study...
November 17, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29159365/novel-stool-based-protein-biomarkers-for-improved-colorectal-cancer-screening-a-case-control-study
#12
Linda J W Bosch, Meike de Wit, Thang V Pham, Veerle M H Coupé, Annemieke C Hiemstra, Sander R Piersma, Gideon Oudgenoeg, George L Scheffer, Sandra Mongera, Jochim Terhaar Sive Droste, Frank A Oort, Sietze T van Turenhout, Ilhame Ben Larbi, Joost Louwagie, Wim van Criekinge, Rene W M van der Hulst, Chris J J Mulder, Beatriz Carvalho, Remond J A Fijneman, Connie R Jimenez, Gerrit A Meijer
Background: The fecal immunochemical test (FIT) for detecting hemoglobin is used widely for noninvasive colorectal cancer (CRC) screening, but its sensitivity leaves room for improvement. Objective: To identify novel protein biomarkers in stool that outperform or complement hemoglobin in detecting CRC and advanced adenomas. Design: Case-control study. Setting: Colonoscopy-controlled referral population from several centers...
November 21, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29159211/the-relationship-between-knowledge-of-leadership-and-knowledge-management-practices-in-the-food-industry-in-kurdistan-province-iran
#13
Seyyed Mohammad Moosavi Jad, Sahar Geravandi, Mohammad Javad Mohammadi, Rashin Alizadeh, Mohammad Sarvarian, Babak Rastegarimehr, Abolhasan Afkar, Ahmad Reza Yari, Mahboobeh Momtazan, Aliasghar Valipour, Mohammad Mahboubi, Azimeh Karimyan, Alireza Mazraehkar, Ali Soleimani Nejad, Hafez Mohammadi
The aim of this study was to identify the relationship between the knowledge of leadership and knowledge management practices. This research strategy, in terms of quantity, procedure and obtain information, is descriptive and correlational. Statistical population, consist of all employees of a food industry in Kurdistan province of Iran, who were engaged in 2016 and their total number is about 1800 people. 316 employees in the Kurdistan food industry (Kurdistan FI) were selected, using Cochran formula. Non-random method and valid questions (standard) for measurement of the data are used...
December 2017: Data in Brief
https://www.readbyqxmd.com/read/29159139/task-shifting-point-of-care-cd4-testing-to-lay-health-workers-in-hiv-care-and-treatment-services-in-namibia
#14
Francina Kaindjee-Tjituka, Souleymane Sawadogo, Graham Mutandi, Andrew D Maher, Natanael Salomo, Claudia Mbapaha, Marytha Neo, Anita Beukes, Justice Gweshe, Alexinah Muadinohamba, David W Lowrance
Introduction: Access to CD4+ testing remains a common barrier to early initiation of antiretroviral therapy among persons living with HIV/AIDS in low- and middle-income countries. The feasibility of task-shifting of point-of-care (POC) CD4+ testing to lay health workers in Namibia has not been evaluated. Methods: From July to August 2011, Pima CD4+ analysers were used to improve access to CD4+ testing at 10 selected public health facilities in Namibia. POC Pima CD4+ testing was performed by nurses or lay health workers...
2017: African Journal of Laboratory Medicine
https://www.readbyqxmd.com/read/29158956/validity-of-functional-screening-tests-to-predict-lost-time-lower-quarter-injury-in-a-cohort-of-female-collegiate-athletes
#15
P David Walbright, Nicole Walbright, Heidi Ojha, Todd Davenport
Background: Lower quarter injuries account for more than 50% of all injuries in collegiate athletics. Neuromuscular screening tests could potentially identify athletes who are at risk for sustaining an injury. While previous research has studied individual tests, the authors of this paper are unaware of any study that has compared diagnostic accuracy of multiple neuromuscular screening tests within one study cohort. Hypothesis/Purpose: The purpose of this study was to examine the accuracy of three common neuromuscular screening tests to predict the occurrence of a lower quarter injury in female collegiate volleyball and basketball players...
November 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29158836/a-laser-activated-biocompatible-theranostic-nanoagent-for-targeted-multimodal-imaging-and-photothermal-therapy
#16
Liming Deng, Xiaojun Cai, Danli Sheng, Yang Yang, Eric M Strohm, Zhigang Wang, Haitao Ran, Dong Wang, Yuanyi Zheng, Pan Li, Tingting Shang, Yi Ling, Fengjuan Wang, Yang Sun
Multifunctional nanoparticles have been reported for cancer detection and treatment currently. However, the accurate diagnosis and efficient treatment for tumors are still not satisfied. Here we report on the development of targeted phase change multimodal polymeric nanoparticles for the imaging and treatment of HER2-positive breast cancer. METHODS: We evaluated the multimodal imaging capabilities of the prepared nanoparticles in vitro using agar-based phantoms. The targeting performance and cytotoxicity of the nanoparticles were examined in cell culture using SKBR3 (over-expressing HER2) and MDA-MB-231 (HER2 negative) cells...
2017: Theranostics
https://www.readbyqxmd.com/read/29158620/evaluation-of-different-jumping-tests-in-defining-position-specific-and-performance-level-differences-in-high-level-basketball-players
#17
Miran Pehar, Damir Sekulic, Nedim Sisic, Miodrag Spasic, Ognjen Uljevic, Ante Krolo, Zoran Milanovic, Tine Sattler
The importance of jumping ability in basketball is well known, but there is an evident lack of studies that have examined different jumping testing protocols in basketball players at advanced levels. The aim of this study was to assess the applicability of different tests of jumping capacity in identifying differences between (i) playing position and (ii) competitive levels of professional players. Participants were 110 male professional basketball players (height: 194.92±8.09 cm; body mass: 89.33±10.91 kg; 21...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29158615/using-lactate-threshold-to-predict-5-km-treadmill-running-performance-in-veteran-athletes
#18
Jacky Forsyth, Dean Burt, Fiona Ridley, Christopher Mann
Measuring lactate threshold to predict endurance performance is difficult among veteran athletes, due to age-related decreases in net lactate concentration. The objective of this study was to determine whether lactate threshold, as assessed using the maximal deviation method (Dmax), which is not dependent on net values of lactate, could be used as a more valid measure of 5-km treadmill running performance than other methods of determining lactate threshold. Veteran runners (18 male and 18 female, aged 47.3±6...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29158232/development-and-validation-of-qdiabetes-2018-risk-prediction-algorithm-to-estimate-future-risk-of-type-2-diabetes-cohort-study
#19
Julia Hippisley-Cox, Carol Coupland
Objectives To derive and validate updated QDiabetes-2018 prediction algorithms to estimate the 10 year risk of type 2 diabetes in men and women, taking account of potential new risk factors, and to compare their performance with current approaches.Design Prospective open cohort study.Setting Routinely collected data from 1457 general practices in England contributing to the QResearch database: 1094 were used to develop the scores and a separate set of 363 were used to validate the scores.Participants 11...
November 20, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/29158151/a-novel-liquid-media-mycobacteria-extraction-method-for-maldi-tof-ms-identification-using-vitek%C3%A2-ms
#20
Erik Moreno, Eric Miller, Elizabeth Miller, Heather Totty, Parampal Deol
A low-cost identification method that can be performed directly from a positive liquid medium culture is needed for the diagnosis of mycobacterial infections. Here, we describe a novel, cost-effective, and validated method that allows for direct and rapid identification of mycobacteria from a positive liquid culture using VITEK® MS with a total process duration under 45min. From a liquid mycobacteria culture a 3.0mL aliquot is removed 24-72h post positivity and centrifuged to create a pellet. After decanting, the tube is blotted dry, the pellet is re-suspended in 0...
November 17, 2017: Journal of Microbiological Methods
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