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Real world data

Fayyaz Ul Amir Afsar Minhas, Amina Asif, Muhammad Arif
: Feature selection and ranking is of great importance in the analysis of biomedical data. In addition to reducing the number of features used in classification or other machine learning tasks, it allows us to extract meaningful biological and medical information from a machine learning model. Most existing approaches in this domain do not directly model the fact that the relative importance of features can be different in different regions of the feature space. In this work, we present a context aware feature ranking algorithm called CAFÉ-Map...
October 11, 2016: Computers in Biology and Medicine
Rachel A Ryskin, Zhenghan Qi, Melissa C Duff, Sarah Brown-Schmidt
Verbs often participate in more than 1 syntactic structure, but individual verbs can be biased in terms of whether they are used more often with 1 structure or the other. For instance, in a sentence such as "Bop the bunny with the flower," the phrase "with the flower" is more likely to indicate an instrument with which to "bop," rather than which "bunny" to bop. Conversely, in a sentence such as "Choose the cow with the flower," the phrase "with the flower" is more likely to indicate which "cow" to choose. An open question is where these biases come from and whether they continue to be shaped in adulthood in a way that has lasting consequences for real-time processing of language...
October 20, 2016: Journal of Experimental Psychology. Learning, Memory, and Cognition
Bhavana Sosale, Aravind R Sosale, Prassanna M Kumar, Shashank R Joshi
BACKGROUND AND AIM: The number of patients with type 2 diabetes (T2DM) is increasing. Most patients with T2DM are uncontrolled and fail to achieve their target Hba1c. In recent years, newer agents such as SGLT2 inhibitors (SGLT2i) have been approved for clinical use. Though data from clinical trials and sub set analysis of Indian patients in global studies are promising, real world evidence from standard clinical practice in India is lacking. The aim of this study was to analyze the metabolic parameters in patients with T2DM on SGLT2i in real world clinical practice...
September 2016: Journal of the Association of Physicians of India
Weiguo Wang, Jing Xue, Chonghua Du
This article introduces the data of the log real GDP per capita ratio and the log real exchange rate which are used to revisit the Balassa-Samuelson Hypothesis. We acquired the data from IMF and World Bank database, and provide the name and source of the data. All data are openly accessible. Besides, we describe the value of data as well as the method to process the data which can also be found in "The Balassa-Samuelson Hypothesis in the developed and developing countries revisited" (Weiguo Wang, Jing Xue, Chonghua Du, 2016) [1]...
December 2016: Data in Brief
Jonatan Salzer, Rasmus Svenningsson, Peter Alping, Lenka Novakova, Anna Björck, Katharina Fink, Protik Islam-Jakobsson, Clas Malmeström, Markus Axelsson, Mattias Vågberg, Peter Sundström, Jan Lycke, Fredrik Piehl, Anders Svenningsson
OBJECTIVE: To investigate the safety and efficacy of rituximab in multiple sclerosis (MS). METHODS: In this retrospective uncontrolled observational multicenter study, off-label rituximab-treated patients with MS were identified through the Swedish MS register. Outcome data were collected from the MS register and medical charts. Adverse events (AEs) grades 2-5 according to the Common Terminology Criteria for Adverse Events were recorded. RESULTS: A total of 822 rituximab-treated patients with MS were identified: 557 relapsing-remitting MS (RRMS), 198 secondary progressive MS (SPMS), and 67 primary progressive MS (PPMS)...
October 19, 2016: Neurology
Daniel J Friedman, Haikun Bao, Erica S Spatz, Jeptha P Curtis, James P Daubert, Sana M Al-Khatib
BACKGROUND: -A prolonged PR interval is common among cardiac resynchronization therapy (CRT) candidates; however, the association between PR interval and outcomes is unclear, and data are conflicting. METHODS: -We conducted inverse probability weighted (IPW) analyses of 26,451 CRT eligible (EF≤35, QRS≥120ms) patients from the National Cardiovascular Data Registry ICD Registry to assess the association between a prolonged PR interval (≥230ms), receipt of CRT with defibrillator (CRT-D) versus implantable cardioverter defibrillator (ICD), and outcomes...
October 19, 2016: Circulation
Jakub Tomek, Rebecca A B Burton, Gil Bub
Cardiac arrhythmias are one of the most frequent causes of death worldwide. A popular biological model used to study arrhythmogenesis is the cultured cardiac cell monolayer, which provides a good trade-off between physiological relevance and experimental access. Excitation wave patterns are imaged using high-bandwidth detectors, producing large data sets that are typically analyzed manually. To make such analysis less time consuming and less subjective, we have designed and implemented a toolkit for segmentation and tracking of cardiac waves in optical mapping recordings...
October 18, 2016: Biophysical Journal
Stephen B Soumerai, Rachel Ceccarelli, Ross Koppel
Some medical scientists argue that only data from randomized controlled trials (RCTs) are trustworthy. They claim data from natural experiments and administrative data sets are always spurious and cannot be used to evaluate health policies and other population-wide phenomena in the real world. While many acknowledge biases caused by poor study designs, in this article we argue that several valid designs using administrative data can produce strong findings, particularly the interrupted time series (ITS) design...
October 18, 2016: Journal of General Internal Medicine
Mari-Lynn Drainoni, Elisa A Koppelman, James A Feldman, Alexander Y Walley, Patricia M Mitchell, Jacqueline Ellison, Edward Bernstein
BACKGROUND: The increase in opioid overdose deaths has become a national public health crisis. Naloxone is an important tool in opioid overdose prevention. Distribution of nasal naloxone has been found to be a feasible, and effective intervention in community settings and may have potential high applicability in the emergency department, which is often the initial point of care for persons at high risk of overdose. One safety net hospital introduced an innovative policy to offer take-home nasal naloxone via a standing order to ensure distribution to patients at risk for overdose...
October 18, 2016: BMC Research Notes
Constanze Ciavarella, Laura Fumanelli, Stefano Merler, Ciro Cattuto, Marco Ajelli
BACKGROUND: Nearly every year Influenza affects most countries worldwide and the risk of a new pandemic is always present. Therefore, influenza is a major concern for public health. School-age individuals are often the most affected group, suggesting that the inclusion in preparedness plans of school closure policies may represent an option for influenza mitigation. However, their applicability remains uncertain and their implementation should carefully be weighed on the basis of cost-benefit considerations...
October 18, 2016: BMC Infectious Diseases
Henry C Ndukwe, Prasad S Nishtala
Consensus guidelines which are applicable in New Zealand and worldwide recommend that the duration of exposure to antipsychotics not exceed 12 weeks, unless justified for mental illnesses like schizophrenia and severe psychotic symptoms which require longer treatment. There has been limited information on time-to-first discontinuation (TTFD) for second-generation antipsychotics (SGAs) in a real world population setting in older people. The study objective was to compare TTFD, adherence, and persistence for individual SGA new users among people 65 years and older...
October 17, 2016: Journal of Clinical Psychopharmacology
Michel Farnier
PURPOSE OF REVIEW: After the approval of alirocumab and evolocumab, the first two monoclonal antibodies (mAbs) targeting proprotein convertase subtilisin kexin type 9 (PCSK9), this review provides an update on recent PCSK9 inhibitors data and describes recommendations for the use before the results of the ongoing cardiovascular endpoint trials. RECENT FINDINGS: New studies and complementary analysis of phase III trials have consistently shown that alirocumab and evolocumab are highly effective in reducing LDL-cholesterol and to some extent lipoprotein (a)...
October 17, 2016: Current Opinion in Lipidology
Rafael Pérez-Torres, César Torres-Huitzil, Hiram Galeana-Zapién
The tracking of frequently visited places, also known as stay points, is a critical feature in location-aware mobile applications as a way to adapt the information and services provided to smartphones users according to their moving patterns. Location based applications usually employ the GPS receiver along with Wi-Fi hot-spots and cellular cell tower mechanisms for estimating user location. Typically, fine-grained GPS location data are collected by the smartphone and transferred to dedicated servers for trajectory analysis and stay points detection...
October 13, 2016: Sensors
Yue Zhang, Huanxin Zou, Tiancheng Luo, Xianxiang Qin, Shilin Zhou, Kefeng Ji
The superpixel segmentation algorithm, as a preprocessing technique, should show good performance in fast segmentation speed, accurate boundary adherence and homogeneous regularity. A fast superpixel segmentation algorithm by iterative edge refinement (IER) works well on optical images. However, it may generate poor superpixels for Polarimetric synthetic aperture radar (PolSAR) images due to the influence of strong speckle noise and many small-sized or slim regions. To solve these problems, we utilized a fast revised Wishart distance instead of Euclidean distance in the local relabeling of unstable pixels, and initialized unstable pixels as all the pixels substituted for the initial grid edge pixels in the initialization step...
October 13, 2016: Sensors
Peter Rijnbeek
Massive numbers of electronic health records are currently being collected globally, including structured data in the form of diagnoses, medications, laboratory test results, and unstructured data contained in clinical narratives. This opens unprecedented possibilities for research and ultimately patient care. However, actual use of these databases in a multi-center study is severely hampered by a variety of challenges, e.g., each database has a different database structure and uses different terminology systems...
September 2016: Journal of Hypertension
Rae Woong Park
Big data indicates the large and ever-increasing volumes of data adhere to the following 4Vs: volume (ever-increasing amount), velocity (quickly generated), variety (many different types), veracity (from trustable sources). The last decade has seen huge advances in the amount of data we routinely generate and collect in pretty much everything we do, as well as our ability to use technology to analyze and understand it. The routine operation of modern health care systems also produces an abundance of electronically stored data on an ongoing basis as a byproduct of clinical practice...
September 2016: Journal of Hypertension
Steven Steinhubl
Despite having the basic tools necessary to appropriately identify and manage individuals with hypertension for over half a century it remains the single greatest contributing risk factor to morbidity and mortality worldwide today. Since diagnosis and effective treatment availability are not issues, this major failing in care can be attributed to inadequate systems of care: systems that have led to only <20% of hypertensive individuals globally having their blood pressure adequately controlled. Even in the US, where it is one of the most common reasons for a primary care visit, and with over $42...
September 2016: Journal of Hypertension
Joung Won Lee, Nam-Kyoo Lim, Jung Hoon Lee, Hyun-Young Park
OBJECTIVE: Hypertension (HTN) and diabetes (DM) have been reported to cause other cardiovascular diseases (CVD). However, evidence of the joint effect of hypertension and diabetes based on real world data is limited in Korea. We aim to evaluate the risks of onset cardiovascular diseases in relation with pre-existing hypertension or diabetes in the middle-aged Koreans using Korean National Health Insurance Database. DESIGN AND METHOD: The 88,187 middle-aged Koreans who did not have any major cardiovascular diseases except for HTN at baseline were analyzed...
September 2016: Journal of Hypertension
Kazuomi Kario
Out-of-office blood pressure (BP) measured by home BP monitoring (HBPM) or ambulatory BP monitoring (ABPM) was demonstrated to be superior to office BP for the prediction of cardiovascular events. The ABPM is superior to HBPM for detecting the all the BP-related risks throughout 24-hr, and the self-measured HBPM underestimates the risk of daytime stress hypertension and nocturnal hypertension. However, ABPM cannot always be provided in clinical practice, and home BP monitoring can be superior to ABPM as part of a home BP-guided antihypertension strategy in clinical practice...
September 2016: Journal of Hypertension
Peter L Jernigan, Matthew C Wallace, Christine S Novak, Travis W Gerlach, Dennis J Hanseman, Timothy A Pritts, Bradley R Davis
BACKGROUND: Critical Care Air Transport Teams (CCATTs) are integral to the U.S. Air Force aeromedical evacuation paradigm. The current study was conducted to evaluate predictors of nontechnical skills (NOTECHS) in CCATT trainees. METHODS: Sixteen CCATTs were studied over a 6-month period. Team members completed a biographical survey and teams were videotaped during a simulated CCATT mission. Teams and individuals were assigned a "red flag score" using a validated assessment tool for NOTECHS...
October 2016: Military Medicine
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