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Laboratory data prediction models

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https://www.readbyqxmd.com/read/28651006/application-of-laboratory-and-portable-attenuated-total-reflectance-infrared-spectroscopic-approaches-for-rapid-quantification-of-alpaca-serum-immunoglobulin-g
#1
Ibrahim Elsohaby, Jennifer B Burns, Christopher B Riley, R Anthony Shaw, J Trenton McClure
The objective of this study was to develop and compare the performance of laboratory grade and portable attenuated total reflectance infrared (ATR-IR) spectroscopic approaches in combination with partial least squares regression (PLSR) for the rapid quantification of alpaca serum IgG concentration, and the identification of low IgG (<1000 mg/dL), which is consistent with the diagnosis of failure of transfer of passive immunity (FTPI) in neonates. Serum samples (n = 175) collected from privately owned, healthy alpacas were tested by the reference method of radial immunodiffusion (RID) assay, and laboratory grade and portable ATR-IR spectrometers...
2017: PloS One
https://www.readbyqxmd.com/read/28648297/modeling-the-risk-of-salmonellosis-from-consumption-of-pistachios-produced-and-consumed-in-the-united-states
#2
Elisabetta Lambertini, Javad Barouei, Donald W Schaffner, Michelle D Danyluk, Linda J Harris
The risk of salmonellosis from consumption of pistachios produced and consumed in the U.S. was assessed through quantitative microbial risk assessment. Data on Salmonella prevalence and concentration on pistachios, nut crop volume, storage times and temperatures during processing and handling, and reductions during storage or from roasting were derived from laboratory experiments, published literature, and industry expert opinion. Uncertainty was analyzed via what-if scenarios for Salmonella prevalence, concentration, storage reduction, treatment variability, portion of crop treated, and increased consumption...
October 2017: Food Microbiology
https://www.readbyqxmd.com/read/28647228/chloramine-demand-estimation-using-surrogate-chemical-and-microbiological-parameters
#3
Sina Moradi, Sanly Liu, Christopher W K Chow, John van Leeuwen, David Cook, Mary Drikas, Rose Amal
A model is developed to enable estimation of chloramine demand in full scale drinking water supplies based on chemical and microbiological factors that affect chloramine decay rate via nonlinear regression analysis method. The model is based on organic character (specific ultraviolet absorbance (SUVA)) of the water samples and a laboratory measure of the microbiological (Fm) decay of chloramine. The applicability of the model for estimation of chloramine residual (and hence chloramine demand) was tested on several waters from different water treatment plants in Australia through statistical test analysis between the experimental and predicted data...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28645195/mutational-biases-influence-parallel-adaptation
#4
Arlin Stoltzfus, David M McCandlish
While mutational biases strongly influence neutral molecular evolution, the role of mutational biases in shaping the course of adaptation is less clear. Here we consider the frequency of transitions relative to transversions among adaptive substitutions. Because mutation rates for transitions are higher than those for transversions, if mutational biases influence the dynamics of adaptation, then transitions should be over-represented among documented adaptive substitutions. To test this hypothesis, we assembled 2 sets of data on putatively adaptive amino acid replacements that have occurred in parallel during evolution, either in nature or in the laboratory...
June 22, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28641232/on-the-aquatic-toxicity-of-substituted-phenols-to-chlorella-vulgaris-qstr-with-an-extended-novel-data-set-and-interspecies-models
#5
Gulcin Tugcu, M Doğa Ertürk, Melek Türker Saçan
This study provides for the first time the 96-h toxicity of 16 nitro- and methyl- substituted phenols to Chlorella vulgaris. Enabling the circulation of new ecotoxicity data has expanded the previously reported toxicity data set of 30 phenols to C. vulgaris by our laboratory. In this respect, high quality, single source algal toxicity data, generated in the same laboratory according to a REACH (Registration, Evaluation, Authorization and Restriction of CHemicals) compatible endpoint, provided a sound basis to explore quantitative structure-toxicity relationship (QSTR), which can be used for regulatory purposes...
June 15, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28638408/reanalysis-and-external-validation-of-a-decision-tree-model-for-detecting-unrecognized-diabetes-in-rural-chinese-individuals
#6
Zhong Xin, Lin Hua, Xu-Hong Wang, Dong Zhao, Cai-Guo Yu, Ya-Hong Ma, Lei Zhao, Xi Cao, Jin-Kui Yang
We reanalyzed previous data to develop a more simplified decision tree model as a screening tool for unrecognized diabetes, using basic information in Beijing community health records. Then, the model was validated in another rural town. Only three non-laboratory-based risk factors (age, BMI, and presence of hypertension) with fewer branches were used in the new model. The sensitivity, specificity, positive predictive value, negative predictive value, and area under the curve (AUC) for detecting diabetes were calculated...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28632918/predicting-inpatient-hypoglycaemia-in-hospitalized-patients-with-diabetes-a-retrospective-analysis-of-9584-admissions-with-diabetes
#7
K Stuart, N J Adderley, T Marshall, G Rayman, A Sitch, S Manley, S Ghosh, K A Toulis, K Nirantharakumar
AIMS: To explore whether a quantitative approach to identifying hospitalized patients with diabetes at risk of hypoglycaemia would be feasible through incorporation of routine biochemical, haematological and prescription data. METHODS: A retrospective cross-sectional analysis of all diabetic admissions (n=9584) from 1 January 2014 to 31 December 2014 was performed. Hypoglycaemia was defined as a blood glucose level of <4 mmol/l. The prediction model was constructed using multivariable logistic regression, populated by clinically important variables and routine laboratory data...
June 20, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28629317/surface-hypothermia-predicts-murine-mortality-in-the-intragastric-vibrio-vulnificus-infection-model
#8
Hannah E Gavin, Karla J F Satchell
BACKGROUND: The Gram-negative bacterium Vibrio vulnificus can cause severe disease in humans who consume undercooked, contaminated seafood. To study food-borne V. vulnificus disease in the laboratory, mouse virulence studies predominantly use death as the primary experimental endpoint because behaviorally based moribund status does not consistently predict lethality. This study assessed ventral surface temperature (VST) and its association with mouse survival during V. vulnificus virulence studies as an efficacious, humane alternative...
June 19, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28628990/kinetic-modelling-of-starch-and-lipid-formation-during-mixotrophic-nutrient-limited-microalgal-growth
#9
Gonzalo M Figueroa-Torres, Jon K Pittman, Constantinos Theodoropoulos
Microalgal starch and lipids, carbon-based storage molecules, are useful as potential biofuel feedstocks. In this work, cultivation strategies maximising starch and lipid formation were established by developing a multi-parameter kinetic model describing microalgal growth as well as starch and lipid formation, in conjunction with laboratory-scale experiments. Growth dynamics are driven by nitrogen-limited mixotrophic conditions, known to increase cellular starch and lipid contents whilst enhancing biomass growth...
June 2, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28624829/preoperative-c-reactive-protein-values-as-a-potential-component-in-outcome-prediction-models-of-metastasized-renal-cell-carcinoma-patients-receiving-cytoreductive-nephrectomy
#10
Charis Kalogirou, Philipp Mulfinger, Ioannis Sokolakis, Markus Krebs, Hubert Kübler, Hubertus Riedmiller, Daniel Vergho
PURPOSE: To validate preoperative C-reactive protein (CRP) levels as a prognostic marker for survival in a metastasized renal cell carcinoma (mRCC) patient cohort receiving cytoreductive nephrectomy (CN). PATIENTS AND METHODS: By chart review, 146 mRCC patients receiving CN at our tertiary referral centre from 1997 to 2015 were identified retrospectively. All relevant clinicopathological features including laboratory parameters were collected and correlated to overall survival, progression-free survival and cancer-specific survival (CSS)...
June 17, 2017: Urologia Internationalis
https://www.readbyqxmd.com/read/28620738/variation-in-sex-pheromone-emission-does-not-reflect-immunocompetence-but-affects-attractiveness-of-male-burying-beetles-a-combination-of-laboratory-and-field-experiments
#11
Johanna Chemnitz, Nadiia Bagrii, Manfred Ayasse, Sandra Steiger
Life history theory predicts a trade-off between male sexual trait expression and immunocompetence. Using burying beetles, Nicrophorus vespilloides, as a model, we investigated the relationship between male immune function, sex pheromone emission, and attractiveness under field conditions. In the first experiment, we tested whether there is a positive correlation between immune capacity, sex pheromone characteristics (quantity, relative composition, and time invested in pheromone emission), and male attractiveness...
August 2017: Die Naturwissenschaften
https://www.readbyqxmd.com/read/28616547/predictors-of-tamponade-and-constriction-in-patients-with-pericardial-disease-undergoing-interventional-and-surgical-treatment
#12
Taalaibek Kudaiberdiev, Seitkhan Joshibayev, Gulzada Imanalieva, Alimkadir S Beishenaliev, Abdulin A Ashinaliev, Taalaibek A Baisekeev, Sergei Chinaliev
OBJECTIVE: The aim of our study was to define predictors of cardiac compression development including clinical, electrocardiographic, echocardiographic, chest-X-ray and perioperative parameters and their diagnostic value. METHODS: Overall 243 patients with pericardial disease, among them 123 with compression (tamponade, constriction) and 120 without signs of compression were included in the study. Clinical, laboratory, electrocardiographic, chest-X-Ray, echocardiographic and perioperative data were included in the logistic regression analysis to define predictors of tamponade/constriction development...
September 2016: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/28615279/medicines-optimisation-assessment-tool-moat-a-prognostic-model-to-target-hospital-pharmacists-input-to-improve-patient-outcomes-protocol-for-an-observational-study
#13
Cathy Geeson, Li Wei, Bryony Dean Franklin
INTRODUCTION: Medicines optimisation is a key role for hospital pharmacists, but with ever-increasing demands on services there is a need to increase efficiency while maintaining patient safety. The aim of this study is to develop a prognostic model, the Medicines Optimisation Assessment Tool (MOAT), which can be used to target patients most in need of pharmacists' input while in hospital. METHODS AND ANALYSIS: The MOAT will be developed following recommendations of the Prognosis Research Strategy partnership...
June 14, 2017: BMJ Open
https://www.readbyqxmd.com/read/28605564/foraging-distance-and-population-size-of-juvenile-colonies-of-the-formosan-subterranean-termite-isoptera-rhinotermitidae-in-laboratory-extended-arenas
#14
Nan-Yao Su, Weste Osbrink, Garima Kakkar, Aaron Mullins, Thomas Chouvenc
The relationship between colony size and foraging distance was examined in extended foraging arenas with juvenile colonies of the Formosan subterranean termite, Coptotermes formosanus Shiraki. Our results showed that as long as royal pairs are present, larger colonies foraged at longer distances, and the oldest workers distributed farther away from the central nest. The results agree with the scaling model that predicts a large foraging range for animals of larger body size. An analysis of published data from population survey studies and field trials of bait toxicants showed that field colonies of the eastern subterranean termite, Reticulitermes flavipes (Kollar), follow the scaling model, while C...
June 9, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28604053/are-fixations-in-static-natural-scenes-a-useful-predictor-of-attention-in-the-real-world
#15
Tom Foulsham, Alan Kingstone
Research investigating scene perception normally involves laboratory experiments using static images. Much has been learned about how observers look at pictures of the real world and the attentional mechanisms underlying this behaviour. However, the use of static, isolated pictures as a proxy for studying everyday attention in real environments has led to the criticism that such experiments are artificial. We report a new study that tests the extent to which the real world can be reduced to simpler laboratory stimuli...
June 2017: Canadian Journal of Experimental Psychology, Revue Canadienne de Psychologie Expérimentale
https://www.readbyqxmd.com/read/28596271/extracting-aerobic-system-dynamics-during-unsupervised-activities-of-daily-living-using-wearable-sensor-machine-learning-models
#16
Thomas Beltrame, Robert Amelard, Alexander Wong, Richard L Hughson
Physical activity levels are related through algorithms to the energetic demand with no information regarding the integrity of the multiple physiological systems involved in the energetic supply. Longitudinal analysis of the oxygen uptake (VO2) by wearable sensors in realistic settings might permit development of a practical tool for the study of the longitudinal aerobic system dynamics (i.e., VO2 kinetics). This study evaluated aerobic system dynamics based on predicted VO2 data obtained from wearable sensors during unsupervised activities of daily living (uADL)...
June 8, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28590499/can-statistical-machine-learning-algorithms-help-for-classification-of-obstructive-sleep-apnea-severity-to-optimal-utilization-of-polysomnography-resources
#17
Selen Bozkurt, Asli Bostanci, Murat Turhan
OBJECTIVES: The goal of this study is to evaluate the results of machine learning methods for the classification of OSA severity of patients with suspected sleep disorder breathing as normal, mild, moderate and severe based on non-polysomnographic variables: 1) clinical data, 2) symptoms and 3) physical examination. METHODS: In order to produce classification models for OSA severity, five different machine learning methods (Bayesian network, Decision Tree, Random Forest, Neural Networks and Logistic Regression) were trained while relevant variables and their relationships were derived empirically from observed data...
June 7, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28582977/sorption-of-poly-and-perfluoroalkyl-substances-pfass-relevant-to-aqueous-film-forming-foam-afff-impacted-groundwater-by-biochars-and-activated-carbon
#18
Xin Xiao, Bridget A Ulrich, Baoliang Chen, Christopher P Higgins
Despite growing concerns about human exposure to perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS), other poly- and perfluoroalkyl substances (PFASs) derived from aqueous film-forming foams (AFFFs) have garnered little attention. While these other PFASs may also be present in AFFF-impacted drinking water, their removal by conventional drinking-water treatment is poorly understood. This study compared the removal of 30 PFASs, including 13 recently discovered PFASs, from an AFFF-impacted drinking water using carbonaceous sorbents (i...
June 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28581873/budget-impact-model-in-moderate-to-severe-psoriasis-vulgaris-assessing-effects-of-calcipotriene-and-betamethasone-dipropionate-foam-on-per-patient-standard-of-care-costs
#19
Carl V Asche, Minchul Kim, Steven R Feldman, Panagiotis Zografos, Minyi Lu
AIMS: To develop a budget impact model (BIM) for estimating the financial impact of formulary adoption and uptake of calcipotriene and betamethasone dipropionate (C/BD) foam (0.005%/0.064%) on the costs of biologics for treating moderate-to-severe psoriasis vulgaris in a hypothetical US healthcare plan with 1 million members. METHODS: This BIM incorporated epidemiologic data, market uptake assumptions, and drug utilization costs, simulating the treatment mix for patients who are candidates for biologics before (Scenario #1) and after (Scenario #2) the introduction of C/BD foam...
June 19, 2017: Journal of Medical Economics
https://www.readbyqxmd.com/read/28579183/confluence-of-epidemics-of-hepatitis-c-diabetes-obesity-and-chronic-kidney-disease-in-the-united-states-population
#20
Mariana Lazo, Chizoba Nwankwo, Natalie R Daya, David L Thomas, Shruti H Mehta, Stephen Juraschek, Kerry Willis, Elizabeth Selvin
BACKGROUND & AIMS: Obesity, kidney disease, and diabetes are common conditions that can affect outcomes of patients with chronic hepatitis C. We aimed to quantify the burden of these comorbid conditions among adults with chronic hepatitis C in the United States and to estimate the risk of death among people with chronic hepatitis C and comorbidities. METHODS: We conducted cross-sectional and prospective analyses of 13,726 participants in the third National Health and Nutrition Examination Survey (NHANES III) and 23,691 participants of NHANES 1999-2012...
June 1, 2017: Clinical Gastroenterology and Hepatology
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