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Threshold Regression

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https://www.readbyqxmd.com/read/28549672/rotational-thromboelastometry-predicts-increased-bleeding-after-off-pump-coronary-bypass-surgery
#1
Sarah Soh, Young-Lan Kwak, Jong-Wook Song, Kyung-Jong Yoo, Hee-Jung Kim, Jae-Kwang Shim
BACKGROUND: We aimed to investigate the ability of rotational thromboelastometry (ROTEM) thresholds for coagulopathy to predict increased perioperative blood loss in off-pump coronary artery bypass graft surgery (OPCABG) and its association with transfusion requirement. METHODS: The data of 303 patients undergoing OPCABG were retrospectively analyzed. Perioperative blood loss and transfusion requirement were compared according to the presence of abnormal ROTEM thresholds, which were tested after anesthesia induction and heparin reversal...
May 24, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28548599/an-extent-of-resection-threshold-for-seizure-freedom-in-patients-with-low-grade-gliomas
#2
David S Xu, Al-Wala Awad, Chad Mehalechko, Jeffrey R Wilson, Lynn S Ashby, Stephen W Coons, Nader Sanai
OBJECTIVE Seizures are the most common presenting symptom of newly diagnosed WHO Grade II gliomas (low-grade glioma [LGG]) and significantly impair quality of life. Although gross-total resection of LGG is associated with better seizure control, it remains unclear whether an extent of resection (EOR) "threshold" exists for long-term seizure control. Specifically, what proportion of FLAIR-positive tissue in patients with newly diagnosed LGG must be removed to achieve Engel Class I seizure freedom? To clarify the EOR threshold for long-term seizure control, the authors analyzed data from a consecutive series of patients with newly diagnosed LGG who presented with seizures and subsequently underwent microsurgical resection...
May 26, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28545721/impact-of-menafrivac-in-nine-countries-of-the-african-meningitis-belt-2010-15-an-analysis-of-surveillance-data
#3
Caroline L Trotter, Clément Lingani, Katya Fernandez, Laura V Cooper, André Bita, Carol Tevi-Benissan, Olivier Ronveaux, Marie-Pierre Préziosi, James M Stuart
BACKGROUND: In preparation for the introduction of MenAfriVac, a meningococcal group A conjugate vaccine developed for the African meningitis belt, an enhanced meningitis surveillance network was established. We analysed surveillance data on suspected and confirmed cases of meningitis to quantify vaccine impact. METHODS: We compiled and analysed surveillance data for nine countries in the meningitis belt (Benin, Burkina Faso, Chad, Côte d'Ivoire, Ghana, Mali, Niger, Nigeria, and Togo) collected and curated by the WHO Inter-country Support Team between 2005 and 2015...
May 22, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28544769/serum-biomarkers-can-predict-a-change-in-liver-fibrosis-one-year-after-lifestyle-intervention-for-biopsy-proven-nash
#4
Eduardo Vilar-Gomez, Luis Calzadilla-Bertot, Scott L Friedman, Bienvenido Gra-Oramas, Licet Gonzalez-Fabian, Sacha Lazo-Del Vallin, Moises Diago, Leon A Adams
BACKGROUND & AIMS: The dynamic response of serum fibrosis biomarkers to histological changes within the liver following lifestyle intervention (LI) is unknown. We explored relationships between changes in serum biomarkers and liver fibrosis in NASH patients undergoing LI. METHODS: Paired liver biopsies were performed in 261 NASH patients to assess fibrosis change after 1 year of LI. We explored the utility of serum fibrosis markers to predict changes in hepatic fibrosis and developed and internally validated a model for predicting fibrosis improvement in patients with baseline fibrosis...
May 24, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28543084/population-pharmacokinetics-and-exposure-response-assessment-of-cc-292-a-potent-btk-inhibitor-in-patients-with-chronic-lymphocytic-leukemia
#5
Yan Li, Francisco Ramírez-Valle, Yongjun Xue, Judith I Ventura, Olivier Gouedard, Jay Mei, Kenichi Takeshita, Maria Palmisano, Simon Zhou
CC-292, a potent Bruton tyrosine kinase inhibitor, is under development for the treatment of B-cell malignancies. An analysis was performed to develop a population pharmacokinetic model of CC-292 and assess the influence of demographics and disease-related covariates on CC-292 exposure and to assess the exposure-response (overall response rate) relationship in patients with chronic lymphocytic leukemia. Population pharmacokinetic analysis was based on a 2-compartment base model conducted in NONMEM. Categorical exposure-response analysis was performed using logistic regression in SAS...
May 19, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28542954/population-based-study-to-re-evaluate-optimal-lymph-node-yield-in-colonic-cancer
#6
J C Del Paggio, Y Peng, X Wei, S Nanji, P H MacDonald, C Krishnan Nair, C M Booth
BACKGROUND: It is well established that lymph node (LN) yield in colonic cancer resection has prognostic significance, although optimal numbers are not clear. Here, LN thresholds associated with both LN positivity and survival were evaluated in a single population-based data set. METHODS: Treatment records were linked to the Ontario Cancer Registry to identify a 25 per cent random sample of all patients with stage II/III colonic cancer between 2002 and 2008. Multivariable regression and Cox models evaluated factors associated with LN positivity and cancer-specific survival (CSS) respectively...
May 24, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28542622/meta-analysis-of-magnetic-resonance-imaging-accuracy-for-diagnosis-of-oral-cancer
#7
Marcelo Aldrighi Moreira, Luiza Silveira Lessa, Francieli Regina Bortoli, Abigail Lopes, Eduardo Picolo Xavier, Renan Antonio Ceretta, Fernanda Guglielmi Faustini Sônego, Cristiane Damiani Tomasi, Patricia Duarte Simões Pires, Luciane Bisognin Ceretta, Ingrid Dalira Schweigert Perry, Priscyla Waleska Simões
OBJECTIVE: To establish the diagnostic accuracy of magnetic resonance imaging (MRI) as an auxiliary means for the diagnosis of oral cancer through a systematic review and meta-analysis. METHODS: An exhaustive search of publications from 1986 to 2016 was performed of Medline, Embase and Cochrane (and related databases), including grey literature. Primary diagnostic accuracy studies that assessed oral cancer (target condition) using MRI (index test) were included...
2017: PloS One
https://www.readbyqxmd.com/read/28542274/detecting-infection-hotspots-modeling-the-surveillance-challenge-for-elimination-of-lymphatic-filariasis
#8
Julie R Harris, Ryan E Wiegand
BACKGROUND: During the past 20 years, enormous efforts have been expended globally to eliminate lymphatic filariasis (LF) through mass drug administration (MDA). However, small endemic foci (microfoci) of LF may threaten the presumed inevitable decline of infections after MDA cessation. We conducted microsimulation modeling to assess the ability of different types of surveillance to identify microfoci in these settings. METHODS: Five or ten microfoci of radius 1, 2, or 3 km with infection marker prevalence (intensity) of 3, 6, or 10 times background prevalence were placed in spatial simulations, run in R Version 3...
May 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28542101/clinical-impact-of-t1-slope-minus-cervical-lordosis-following-multilevel-posterior-cervical-fusion-surgery-a-minimum-2-year-follow-up-data
#9
Seung-Jae Hyun, Ki-Jeong Kim, Tae-Ahn Jahng, Hyun-Jib Kim
STUDY DESIGN: Retrospective study. OBJECTIVE: To assess the longer term relationship between sagittal alignment of the cervical spine and patient-reported health-related quality-of-life (HRQOL) scores following multilevel posterior cervical fusion, and to explore whether an analog of T1 slope - C2-C7 lordosis ('T1S-CL') impacts on patients' clinical outcomes. SUMMARY OF BACKGROUND DATA: A 6-month follow-up study demonstrated that, similar to the thoracolumbar spine, the severity of disability increases with sagittal malalignment following cervical reconstruction surgery...
May 25, 2017: Spine
https://www.readbyqxmd.com/read/28541412/association-study-of-common-variants-in-pfn1-with-hypertension-in-a-han-chinese-population-a-case-control-study-and-a-follow-up-study
#10
Song Yang, Yanchun Chen, Chunlan Liu, Xianghai Zhao, Qian Zhuang, Junxiang Sun, Pengfei Wei, Hailong Zhao, Xiaotian Chen, Chong Shen
BACKGROUND: Animal researches reported that the dysfunction of profilin1 (PFN1) was involved in the physiological arterial stiffness and vascular remodeling linking to the etiology of hypertension (HT). This study mainly aims at evaluating the association of PFN1 and HT in a Han Chinese population. METHODS: A case-control study consisted of 2,012 HT cases and 2,210 controls was conducted and 2,116 participants from the healthy controls were further followed up for average 5...
May 24, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28539912/using-brain-oscillations-and-corticospinal-excitability-to-understand-and-predict-post-stroke-motor-function
#11
Aurore Thibaut, Marcel Simis, Linamara Rizzo Battistella, Chiara Fanciullacci, Federica Bertolucci, Rodrigo Huerta-Gutierrez, Carmelo Chisari, Felipe Fregni
What determines motor recovery in stroke is still unknown and finding markers that could predict and improve stroke recovery is a challenge. In this study, we aimed at understanding the neural mechanisms of motor function recovery after stroke using neurophysiological markers by means of cortical excitability (transcranial magnetic stimulation-TMS) and brain oscillations (electroencephalography-EEG). In this cross-sectional study, 55 subjects with chronic stroke (62 ± 14 yo, 17 women, 32 ± 42 months post-stroke) were recruited in two sites...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28539823/association-between-sarcopenia-and-hearing-thresholds-in-postmenopausal-women
#12
Seok Hui Kang, Da Jung Jung, Kyu Hyang Cho, Jong Won Park, Kyu-Yup Lee, Jun Young Do
Background: Given the association between metabolic disturbance and sarcopenia, sarcopenia may be intrinsically associated with the prevalence of HL. However, few studies describe the association between sarcopenia and HL. The aim of this study was to evaluate the clinical association between sarcopenia and HL in postmenopausal Korean women. Patients and Methods: A total of 4,038 women were ultimately included in this study. All participants were postmenopausal. Participants were divided into two groups based on criteria from the Foundation for the National Institute of Health Sarcopenia Project: a normal group (sarcopenia index ≥ 0...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28539116/modeling-long-term-human-activeness-using-recurrent-neural-networks-for-biometric-data
#13
Zae Myung Kim, Hyungrai Oh, Han-Gyu Kim, Chae-Gyun Lim, Kyo-Joong Oh, Ho-Jin Choi
BACKGROUND: With the invention of fitness trackers, it has been possible to continuously monitor a user's biometric data such as heart rates, number of footsteps taken, and amount of calories burned. This paper names the time series of these three types of biometric data, the user's "activeness", and investigates the feasibility in modeling and predicting the long-term activeness of the user. METHODS: The dataset used in this study consisted of several months of biometric time-series data gathered by seven users independently...
May 18, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28538301/proposal-of-a-new-specific-cardiopulmonary-exercise-test-for-taekwondo-athletes
#14
Marcus P Araujo, Antônio C L Nóbrega, Gabriel Espinosa, Matheus R Hausen, Renata R T Castro, Pedro P Soares, Jonas L Gurgel
Araujo, MP, Nóbrega, ACL, Espinosa, G, Hausen, MR, Castro, RRT, Soares, PP, and Gurgel, JL. Proposal of a new specific cardiopulmonary exercise test for taekwondo athletes. J Strength Cond Res 31(6): 1525-1535, 2017-The objective of this study is to evaluate the cardiorespiratory variables of Taekwondo athletes while performing incremental exercise test on an ergometer using a ramp protocol and to propose a specific protocol for assessing these physiological variables during Taekwondo practice. Fourteen athletes participated in 2 incremental exercise tests: a treadmill exercise test (TREADtest) and a Taekwondo-specific exercise test (TKDtest)...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28537368/the-relationship-between-maternal-smoking-during-pregnancy-and-parental-reported-experience-of-dental-caries-in-indigenous-australian-children
#15
C Claudia, X Ju, G Mejia, L Jamieson
Objective: This study aimed to test the association between maternal smoking during pregnancy and parental-reported experience of dental caries in Indigenous Australian children. Methods: Data were from the Longitudinal Study of Indigenous Children (LSIC); a population-based cohort study in Australia. Participants were 1,687 Indigenous Australian children aged 5 or less. Biological, social and behavioural variables were tested using log-linear modelling with binomial regression to determine the association with parental-reported experience of dental caries...
December 2016: Community Dental Health
https://www.readbyqxmd.com/read/28537342/assessing-the-risk-of-sarcopenia-in-the-elderly-the-mini-sarcopenia-risk-assessment-msra-questionnaire
#16
A P Rossi, R Micciolo, S Rubele, F Fantin, C Caliari, E Zoico, G Mazzali, E Ferrari, S Volpato, M Zamboni
OBJECTIVES: to validate the MSRA questionnaire proposed as prescreening tool for sarcopenia, in a population of community-dwelling elderly subjects. DESIGN: observational study. SETTING: community dwelling elderly subjects. PARTICIPANTS: 274 community dwelling elderly subjects, 177 women and 97 men, aged 66-78 years. MEASUREMENTS: Based on EWGSOP diagnostic criteria subjects were classified as sarcopenic and non-sarcopenic...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/28535784/a-meta-regression-analysis-of-41-australian-problem-gambling-prevalence-estimates-and-their-relationship-to-total-spending-on-electronic-gaming-machines
#17
Francis Markham, Martin Young, Bruce Doran, Mark Sugden
BACKGROUND: Many jurisdictions regularly conduct surveys to estimate the prevalence of problem gambling in their adult populations. However, the comparison of such estimates is problematic due to methodological variations between studies. Total consumption theory suggests that an association between mean electronic gaming machine (EGM) and casino gambling losses and problem gambling prevalence estimates may exist. If this is the case, then changes in EGM losses may be used as a proxy indicator for changes in problem gambling prevalence...
May 23, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28535557/endogenous-pain-facilitation-rather-than-inhibition-differs-between-people-with-chronic-fatigue-syndrome-multiple-sclerosis-and-controls-an-observational-study
#18
Simon M Collin, Jo Nijs, Mira Meeus, Andrea Polli, Barbara Willekens, Kelly Ickmans
BACKGROUND: Commonalities in the core symptoms of fatigue and cognitive dysfunction experienced by chronic fatigue syndrome (CFS, also known as ME) and multiple sclerosis (MS) patients have been described. Many CFS and MS patients also experience chronic pain, which has been attributed to central sensitization in both groups of patients. However, the characteristics of pain in CFS and MS patients have not been compared. OBJECTIVES: To compare experimental pain measurements in patients with CFS or MS and healthy controls...
May 2017: Pain Physician
https://www.readbyqxmd.com/read/28535162/examining-the-social-context-of-injection-drug-use-social-proximity-vs-geographic-proximity-to-others-who-inject-drugs
#19
Abby E Rudolph, April M Young, Jennifer R Havens
This analysis uses social network and spatial data to examine associations between one's injection status and social and/or spatial proximity to others who inject. 503 rural persons who use drugs were recruited to participate in the Social Networks among Appalachian People (SNAP) Study (2008-2010). Interviewer-administered surveys collected information on recent sex, drug use, and social support network members (n = 897 ties). Using network simulations, we determined a threshold for the association between social proximity to others who inject and recent injection status ('socially proximal' defined by shortest path≤2)...
May 23, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28533960/body-composition-estimation-from-selected-slices-equations-computed-from-a-new-semi-automatic-thresholding-method-developed-on-whole-body-ct%C3%A2-scans
#20
Alizé Lacoste Jeanson, Ján Dupej, Chiara Villa, Jaroslav Brůžek
BACKGROUND: Estimating volumes and masses of total body components is important for the study and treatment monitoring of nutrition and nutrition-related disorders, cancer, joint replacement, energy-expenditure and exercise physiology. While several equations have been offered for estimating total body components from MRI slices, no reliable and tested method exists for CT scans. For the first time, body composition data was derived from 41 high-resolution whole-body CT scans. From these data, we defined equations for estimating volumes and masses of total body AT and LT from corresponding tissue areas measured in selected CT scan slices...
2017: PeerJ
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