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Time series analysis

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https://www.readbyqxmd.com/read/28217970/anxiety-symptoms-as-a-moderator-of-the-reciprocal-links-between-forms-of-aggression-and-peer-victimization-in-middle-childhood
#1
John L Cooley, Andrew L Frazer, Paula J Fite, Shaquanna Brown, Moneika DiPierro
The current short-term longitudinal study evaluated whether anxiety symptoms moderated the bidirectional associations between forms (i.e., physical and relational) of aggression and peer victimization over a 1-year period during middle childhood. Participants were 228 predominantly Caucasian children (50.4% boys; M = 8.32 years, SD = .95 years) in the second through fourth grades and their homeroom teachers. Children completed a self-report measure of anxiety symptoms at Time 1. Peer victimization was assessed using self-reports at Time 1 and approximately 1 year later (Time 2), and teachers provided ratings of children's aggressive behavior at both time points...
February 20, 2017: Aggressive Behavior
https://www.readbyqxmd.com/read/28217753/lymphadenectomy-state-of-the-art
#2
REVIEW
Daniele Marrelli, Lorenzo De Franco, Livio Iudici, Karol Polom, Franco Roviello
The extent of lymphadenectomy in gastric cancer (GC) surgery has been for long time a matter of debate. Randomized trials performed in the West reported worse results of D2 dissection, in terms of postoperative complications and long-term survival benefit, than Eastern series and observational studies from specialized Western centers. However, long-term re-evaluation of such trials and in depth-analysis of other experiences demonstrated the potential benefit of D2 in reducing the probability of cancer-related death and the safety of this procedure when avoiding unnecessary spleno-pancreatectomy and in centers with ad adequate surgical volume...
2017: Transl Gastroenterol Hepatol
https://www.readbyqxmd.com/read/28217088/a-non-parametric-approach-to-the-overall-estimate-of-cognitive-load-using-nirs-time-series
#3
Soheil Keshmiri, Hidenobu Sumioka, Ryuji Yamazaki, Hiroshi Ishiguro
We present a non-parametric approach to prediction of the n-back n ∈ {1, 2} task as a proxy measure of mental workload using Near Infrared Spectroscopy (NIRS) data. In particular, we focus on measuring the mental workload through hemodynamic responses in the brain induced by these tasks, thereby realizing the potential that they can offer for their detection in real world scenarios (e.g., difficulty of a conversation). Our approach takes advantage of intrinsic linearity that is inherent in the components of the NIRS time series to adopt a one-step regression strategy...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28216359/fenestrated-endovascular-aneurysm-repair-among-octogenarians-at-high-and-standard-risk-for-open-repair
#4
David E Timaran, Martyn Knowles, Tarik Ali, Carlos H Timaran
BACKGROUND: Octogenarians with complex abdominal aortic aneurysms are at higher risk of death and morbidity after open repair. Fenestrated endovascular aneurysm repair (FEVAR) is an alternative to open repair for high-risk patients, such as octogenarians. The aim of this study was to evaluate perioperative and midterm outcomes of FEVAR among octogenarians at high and standard risk for open repair. METHODS: During a 2-year period, 85 patients (68 men [78%] and 17 women [22%]) underwent FEVAR using Zenith (Cook Medical, Bloomington, Ind) Fenestrated AAA Endovascular Grafts (70%), Zenith p-Branch (7%), and fenestrated custom-made devices (22%)...
February 16, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28216095/real-time-quantitative-reverse-transcription-pcr-analysis-of-expression-stability-of-aggregatibacter-actinomycetemcomitans-fimbria-associated-gene-in-response-to-photodynamic-therapy
#5
Maryam Pourhajibagher, Abbas Monzavi, Nasim Chiniforush, Mohammad Moein Monzavi, Shaghayegh Sobhani, Sima Shahabi, Abbas Bahador
BACKGROUND: Aggregatibacter actinomycetemcomitans is an etiological agent of both chronic and aggressive periodontitis. Dissemination of A. actinomycetemcomitans from the oral cavity and initiation of systemic infections has led to new approaches for treatment being needed. In this study, a series of experiments presented investigated the effect of methylene blue (MB)-mediated antimicrobial photodynamic therapy (aPDT) on cell viability and expression of fimbria-associated gene (rcpA) in A...
February 16, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28215698/decoding-the-time-course-of-object-recognition-in-the-human-brain-from-visual-features-to-categorical-decisions
#6
Erika W Contini, Susan G Wardle, Thomas A Carlson
Visual object recognition is a complex, dynamic process. Multivariate pattern analysis methods, such as decoding, have begun to reveal how the brain processes complex visual information. Recently, temporal decoding methods for EEG and MEG have offered the potential to evaluate the temporal dynamics of object recognition. Here we review the contribution of M/EEG time-series decoding methods to understanding visual object recognition in the human brain. Consistent with the current understanding of the visual processing hierarchy, low-level visual features dominate decodable object representations early in the time-course, with more abstract representations related to object category emerging later...
February 16, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28215394/revision-using-totally-hand-sewn-gastrojejunostomy-and-truncal-vagotomy-for-refractory-marginal-ulcer-after-laparoscopic-roux-en-y-gastric-bypass-a-case-series
#7
Po-Chih Chang, Chih-Kun Huang, Chi-Ming Tai, Ivy Ya-Wei Huang, Ming-Che Hsin, Chao-Ming Hung
BACKGROUND: Marginal ulcer (MU) is not infrequent after laparoscopic Roux-en-Y gastric bypass (LRYGB). Medication plus lifestyle modification remains the mainstay solution. Patients with refractory MU may be candidates for revisional surgery. OBJECTIVE: To summarize our experience of revisional surgery for treating refractory MU after LRYGB. SETTING: University hospital, Taiwan. METHODS: A retrospective analysis was performed for 11 patients with refractory MU undergoing totally hand-sewn gastrojejunostomy and truncal vagotomy at our institution between August 2005 and May 2015...
October 4, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28215193/the-impact-of-livestock-manure-control-policy-on-human-leptospirosis-in-republic-of-korea-using-interrupted-time-series-analysis
#8
S Ryu, C L Lau, B C Chun
Leptospirosis is a zoonotic disease that the pathogen can be transmitted to humans through the excretions of infected animals. In the Republic of Korea, the Livestock Manure Control Act was enforced in September 2007 to improve underground water hygiene. The objective of this study was to evaluate the impact of Livestock Manure Control Policy on the incidence and the trend of human leptospirosis. An interrupted time series analysis using the monthly incidence of leptospirosis was conducted based on data derived from the Korean National Surveillance System between January 1999 and January 2015...
February 20, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28215047/pharyngeal-swallowing-pressures-in-the-base-of-tongue-and-hypopharynx-regions-identified-with-three-dimensional-manometry
#9
Sarah P Rosen, Corinne A Jones, Timothy M McCulloch
OBJECTIVES: This study aims to use three-dimensional (3D) high-resolution manometry to identify circumferential pressure patterns generated within the asymmetrical base-of-tongue and hypopharynx regions of the pharynx during deglutition. STUDY DESIGN: Case series. METHODS: Radial pressures in the regions of interest were evaluated during swallowing events in 12 healthy subjects using 3D high-resolution manometry. RESULTS: Repeated measures analysis of variance revealed asymmetrical pharyngeal clearance pressures in the base-of-tongue and hypopharynx regions during swallowing...
February 19, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28212972/variation-in-health-technology-assessment-and-reimbursement-processes-in-europe
#10
Ronald L Akehurst, Eric Abadie, Noël Renaudin, François Sarkozy
BACKGROUND: It has been suggested that differences in health technology assessment (HTA) processes among countries, particularly within Europe, have led to inequity in patient access to new medicines. OBJECTIVES: To provide an up-to-date snapshot analysis of the present status of HTA and reimbursement systems in select European countries, and to investigate the implications of these processes, especially with regard to delays in market and patient access. METHODS: HTA and reimbursement processes were assessed through a review of published and gray literature, and through a series of interviews with HTA experts...
January 2017: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
https://www.readbyqxmd.com/read/28212682/erratum-to-cause-effect-relations-between-55%C3%A2-kd-soluble-tnf-receptor-concentrations-and-specific-and-unspecific-symptoms-in-a-patient-with-mild-sle-disease-activity-an-exploratory-time-series-analysis-study
#11
Christian Schubert, Julia Haberkorn, Francisco M Ocaña-Peinado, Paul König, Norbert Sepp, Mirjam Schnapka-Köpf, Dietmar Fuchs
No abstract text is available yet for this article.
February 17, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28212113/age-and-gender-dependency-of-physiological-networks-in-sleep
#12
Dagmar Krefting, Christoph Jansen, Thomas Penzel, Fang Han, Jan Kantelhardt
Recently, time delay stability analysis of biosignals has been successfully applied as a multivariate time series analysis method to assess the human physiological network in young adults. The degree of connectivity between different network nodes is described by the so-called link strength. Based on polysomnographic recordings (PSGs), it could be shown that the network changes with the sleep stage. Here, we apply the method to a large set of healthy controls spanning six decades of age. As it is well known, that the overall sleep architecture is dependent both on age and on gender, we particularly address the question, if these changes are also found in the network dynamics...
February 17, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28212091/multistability-and-bifurcation-analysis-of-inhibitory-coupled-cyclic-genetic-regulatory-networks-with-delays
#13
Guang Ling, Zhi-Hong Guan, Bin Hu, Qiang Lai, Yonghong Wu
Many biological systems have the conspicuous property to present more than one stable state and diverse rhythmic behaviors. A closed relationship between these complex dynamic behaviors and cyclic genetic structures has been witnessed by pioneering works. In this paper, a typical structure of inhibitory coupled cyclic genetic networks is introduced to further enlighten this mechanism of stability and biological rhythms of living cells. The coupled networks consist two identical cyclic genetic subnetworks, which inhibit each other directly...
February 14, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28210934/adarri-a-novel-method-to-detect-spurious-r-peaks-in-the-electrocardiogram-for-heart-rate-variability-analysis-in-the-intensive-care-unit
#14
Dennis J Rebergen, Sunil B Nagaraj, Eric S Rosenthal, Matt T Bianchi, Michel J A M van Putten, M Brandon Westover
We developed a simple and fully automated method for detecting artifacts in the R-R interval (RRI) time series of the ECG that is tailored to the intensive care unit (ICU) setting. From ECG recordings of 50 adult ICU-subjects we selected 60 epochs with valid R-peak detections and 60 epochs containing artifacts leading to missed or false positive R-peak detections. Next, we calculated the absolute value of the difference between two adjacent RRIs (adRRI), and obtained the empirical probability distributions of adRRI values for valid R-peaks and artifacts...
February 16, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28209158/gene-regulatory-network-underlying-the-immortalization-of-epithelial-cells
#15
Luis Fernando Méndez-López, Jose Davila-Velderrain, Elisa Domínguez-Hüttinger, Christian Enríquez-Olguín, Juan Carlos Martínez-García, Elena R Alvarez-Buylla
BACKGROUND: Tumorigenic transformation of human epithelial cells in vitro has been described experimentally as the potential result of spontaneous immortalization. This process is characterized by a series of cell-state transitions, in which normal epithelial cells acquire first a senescent state which is later surpassed to attain a mesenchymal stem-like phenotype with a potentially tumorigenic behavior. In this paper we aim to provide a system-level mechanistic explanation to the emergence of these cell types, and to the time-ordered transition patterns that are common to neoplasias of epithelial origin...
February 16, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28208849/finger-length-ratio-2d-4d-in-central-india-and-an-attempt-to-verify-fraternal-birth-order-effect-a-population-based-cross-sectional-study
#16
Arjun Maitra, Chaitali Maitra, Dilip Kumar Jha, Rakesh Biswas
INTRODUCTION: A normal physiology of a human being is not mere a series of functions occurring with specific intensities and timing. There are lot of factors that may change the normal physiological activity within normal limits. Finger length ratio is one of the markers of intrauterine androgen exposure and it is debated and contradicted by many authors. Digit ratio varies among the ethnicities. Many Indian studies show that there is considerable difference in finger length ratio in different population...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205340/predictive-modeling-of-eeg-time-series-for-evaluating-surgery-targets-in-epilepsy-patients
#17
Andreas Steimer, Michael Müller, Kaspar Schindler
During the last 20 years, predictive modeling in epilepsy research has largely been concerned with the prediction of seizure events, whereas the inference of effective brain targets for resective surgery has received surprisingly little attention. In this exploratory pilot study, we describe a distributional clustering framework for the modeling of multivariate time series and use it to predict the effects of brain surgery in epilepsy patients. By analyzing the intracranial EEG, we demonstrate how patients who became seizure free after surgery are clearly distinguished from those who did not...
February 16, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28205323/an-evaluation-of-the-costs-and-consequences-of-children-community-nursing-teams
#18
Sebastian Hinde, Victoria Allgar, Gerry Richardson, Gemma Spiers, Gillian Parker, Yvonne Birks
AIMS: Recent years have seen an increasing shift towards providing care in the community, epitomised by the role of Children's Community Nursing (CCN) teams. However, there have been few attempts to use robust evaluative methods to interrogate the impact of such services. This study sought to evaluate whether reduction in secondary care costs, resulting from the introduction of 2 CCN teams, was sufficient to offset the additional cost of commissioning. METHODS: Among the potential benefits of the CCN teams is a reduction in the burden placed on secondary care through the delivery of care at home; it is this potential reduction which is evaluated in this study via a 2-part analytical method...
February 16, 2017: Journal of Evaluation in Clinical Practice
https://www.readbyqxmd.com/read/28205279/cancelled-procedures-in-the-english-nhs-evidence-from-the-2010-tariff-reform
#19
Graham Cookson, Simon Jones, Ioannis Laliotis
This paper explores the role of incentives in the English National Health Service. Until financial year 2009/2010, elective procedures that were cancelled after admission received a fixed reimbursement associated with a specific healthcare resource group code. We investigate whether this induced trusts to admit and then cancel, rather than cancel before admission and/or to cancel low fee over high fee work. As the tariff was ended in April 2010, we conduct an interrupted time series analysis to examine if their behaviour was affected after the tariff removal...
February 16, 2017: Health Economics
https://www.readbyqxmd.com/read/28202783/evaluation-of-a-complex-healthcare-intervention-to-increase-smoking-cessation-in-pregnant-women-interrupted-time-series-analysis-with-economic-evaluation
#20
Ruth Bell, Svetlana V Glinianaia, Zelda van der Waal, Andrew Close, Eoin Moloney, Susan Jones, Vera Araújo-Soares, Sharon Hamilton, Eugene Mg Milne, Janet Shucksmith, Luke Vale, Martyn Willmore, Martin White, Steven Rushton
OBJECTIVES: To evaluate the effectiveness of a complex intervention to improve referral and treatment of pregnant smokers in routine practice, and to assess the incremental costs to the National Health Service (NHS) per additional woman quitting smoking. DESIGN: Interrupted time series analysis of routine data before and after introducing the intervention, within-study economic evaluation. SETTING: Eight acute NHS hospital trusts and 12 local authority areas in North East England...
February 15, 2017: Tobacco Control
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