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https://www.readbyqxmd.com/read/28215045/a-generalized-partially-linear-mean-covariance-regression-model-for-longitudinal-proportional-data-with-applications-to-the-analysis-of-quality-of-life-data-from-cancer-clinical-trials
#1
Xueying Zheng, Guoyou Qin, Dongsheng Tu
Motivated by the analysis of quality of life data from a clinical trial on early breast cancer, we propose in this paper a generalized partially linear mean-covariance regression model for longitudinal proportional data, which are bounded in a closed interval. Cholesky decomposition of the covariance matrix for within-subject responses and generalized estimation equations are used to estimate unknown parameters and the nonlinear function in the model. Simulation studies are performed to evaluate the performance of the proposed estimation procedures...
February 19, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28215039/impact-of-surgical-experience-on-management-and-outcome-of-pancreatic-surgery-performed-in-high-and-low-volume-centers
#2
Marco Stella, Massimiliano Bissolati, Daniele Gentile, Alessandro Arriciati
Pancreaticoduodenectomy (PD) is one of the procedures in general surgery with the highest rate of life-threatening complications. The positive impact of the volume-outcome ratio on outcomes and mortality in pancreatic surgery (PS) has led to policy-level efforts toward centralization of care for PS that is currently under evaluation by some Regional Health Services. The role of the surgeon's experience and training is still under debate. The aim of this paper is to compare the outcomes of PS by the same surgeon in a high volume (HV) and in a low volume (LV) hospital to assess whether a specific training in PS could outdo the benefits of hospital volume...
February 18, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28215004/questionable-papers-in-citation-databases-as-an-issue-for-literature-review
#3
Mehdi Dadkhah, Mohammad Lagzian, Glenn Borchardt
In recent years, the academic world has been faced with much academic misconduct. Examples involve plagiarizing papers, manipulating data, and launching predatory or hijacked journals. The literature exposing these activities is growing exponentially, and so is the presentation of criteria or guidelines for counteracting the problem. Most of the research is focused on predatory or hijacked journal detection and providing suitable warnings. Overlooked in all this is the fact that papers published in these journals are questionable, but nevertheless show up in standard citation databases...
February 18, 2017: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/28214989/exposure-response-analyses-of-blood-pressure-and-heart-rate-changes-for-methylphenidate-in-healthy-adults
#4
Liang Li, Yaning Wang, Ramana S Uppoor, Mehul U Mehta, Tiffany Farchione, Mitchell V Mathis, Hao Zhu
The aim of the study was to evaluate the exposure-response (E-R) relationships of blood pressure (BP) and heart rate (HR) changes in healthy adults taking methylphenidate (MPH). Intensive time profiles of BP and HR from healthy adults in placebo and MPH treatment arms of seven clinical trials from the FDA internal database were utilized for this analysis. The analysis model contains a circadian component for placebo effect and an E-R component to describe drug effect. Internal validation was performed using goodness-of-fit plots and visual predictive check...
February 18, 2017: Journal of Pharmacokinetics and Pharmacodynamics
https://www.readbyqxmd.com/read/28214946/an-evaluation-of-feather-corticosterone-as-a-biomarker-of-fitness-and-an-ecologically-relevant-stressor-during-breeding-in-the-wild
#5
Christopher M Harris, Christine L Madliger, Oliver P Love
Feather corticosterone (CORT) levels are increasingly employed as biomarkers of environmental stress. However, it is unclear if feather CORT levels reflect stress and/or workload in the wild. We investigated whether feather CORT represents a biomarker of environmental stress and reproductive effort in tree swallows (Tachycineta bicolor). Specifically, we examined whether individual state and investment during reproduction could predict feather CORT levels in subsequently moulted feathers and whether those levels could predict future survival and reproductive success...
February 18, 2017: Oecologia
https://www.readbyqxmd.com/read/28214762/paracaecal-hernia-a-case-report-on-the-evolving-role-of-laparoscopy
#6
Ammar Tayaran, Haider Abdulrasool, Hai T Bui
A paracaecal hernia, a type of pericaecal hernias, is a rare cause of small intestinal obstruction. Failure of early recognition and reduction of this type of internal hernia may lead to strangulation of the herniated intestine. There has been a number of case reports in the literature about the different types of pericaecal hernias, however the anatomy of these hernias is still poorly understood and the management is still evolving. We are presenting a 75year old woman, who presented clinically and radiologically with distal small intestinal obstruction...
January 17, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28214752/metabolic-syndrome-and-cardiovascular-risk-among-institutionalized-patients-with-schizophrenia-receiving-long-term-tertiary-care
#7
Lee Seng Esmond Seow, Siow Ann Chong, Peizhi Wang, Saleha Shafie, Hui Lin Ong, Mythily Subramaniam
BACKGROUND: Metabolic syndrome (MetS) and cardiovascular risk are highly prevalent among individuals with schizophrenia. This study aimed to determine the cardiometabolic profile and the associated risk factors in a group of institutionalized patients with schizophrenia or schizoaffective disorder receiving prolonged hospital care in the only tertiary psychiatric institution in Singapore. METHODS: Patients residing in long stay wards who were hospitalized for a minimum period of 1year were recruited...
February 2, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28214751/structure-and-distribution-of-the-sensilla-on-the-antennae-of-tuta-absoluta-lepidoptera-gelechiidae
#8
Thomas Bawin, France Collard, Lara De Backer, Boni Barthélémy Yarou, Philippe Compère, Frédéric Francis, François J Verheggen
The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is a widespread devastating pest that develops on tomato and other economically important solanaceous crops. Current semiochemically-based management strategies still fail to significantly reduce damages and need to be improved. Here we describe under scanning and transmission electron microscopy the structure and distribution of the sensilla that are displayed on adult antennae. These were similar in size between males (3424.4±135.3μm) and females (3292...
February 1, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28214738/problematic-internet-pornography-use-the-role-of-craving-desire-thinking-and-metacognition
#9
Andrew Allen, Lee Kannis-Dymand, Mary Katsikitis
Defined as sexually explicit material that elicits erotic thoughts, feelings, and behaviours, internet pornography is a prevalent form of media that may facilitate problematic use and craving for engagement. Research suggests that superordinate cognitions and information processing, such as desire thinking and metacognition, are central to the activation and escalation of craving in addictive behaviours. The current study aimed to contribute to the literature by testing the proposed metacognitive model of desire thinking and craving in a sample of problematic pornography users, while revising the model by incorporating negative affect...
February 4, 2017: Addictive Behaviors
https://www.readbyqxmd.com/read/28214700/uncertainty-estimation-by-bayesian-approach-in-thermochemical-conversion-of-walnut-hull-and-lignite-coal-blends
#10
Musa Buyukada
The main purpose of the present study was to incorporate the uncertainties in the thermal behavior of walnut hull (WH), lignite coal, and their various blends using Bayesian approach. First of all, thermal behavior of related materials were investigated under different temperatures, blend ratios, and heating rates. Results of ultimate and proximate analyses showed the main steps of oxidation mechanism of (co-)combustion process. Thermal degradation started with the (hemi-)cellulosic compounds and finished with lignin...
February 8, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28214683/neutron-measurements-in-radiotherapy-a-method-to-correct-neutron-sensitive-devices-for-parasitic-photon-response
#11
L Irazola, J A Terrón, R Bedogni, A Pola, M Lorenzoli, E Jimenez-Ortega, A R Barbeiro, B Sánchez-Nieto, F Sánchez-Doblado
One of the major causes of secondary malignancies after radiotherapy treatments are peripheral doses, known to increase for some newer techniques (such as IMRT or VMAT). For accelerators operating above 10MV, neutrons can represent important contribution to peripheral doses. This neutron contamination can be measured using different passive or active techniques, available in the literature. As far as active (or direct-reading) procedures are concerned, a major issue is represented by their parasitic photon sensitivity, which can significantly affect the measurement when the point of test is located near to the field-edge...
February 12, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28214639/congenital-glioblastoma-with-distinct-clinical-and-molecular-characteristics-case-reports-and-a-literature-review
#12
Masahiro Kameda, Yoshihiro Otani, Tomotsugu Ichikawa, Akira Shimada, Koichi Ichimura, Isao Date
BACKGROUND: The molecular diagnosis of brain tumors is important in classifying tumors and determining appropriate treatment. Congenital glioblastoma multiforme (GBM) is a rare tumor that occurs in infants, and the prognosis is poor. Approximately 60 patients diagnosed as congenital GBM have been reported. However, few reports have conducted molecular analyses of congenital GBM. CASE DESCRIPTION: We describe two congenital GBM patients treated in our hospital, and report results of immunohistochemistry, fluorescent in situ hybridization (FISH), direct sequencing, and methylation analyses...
February 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28214636/a-case-of-evolving-bilateral-sphenoidal-meningoencephalocoeles-case-report-and-review-of-literature
#13
Varun Aggarwal, Pankaj Shivhare, E R Jayadevan, Vinod Felix, Mathew Abraham, Suresh Nair, Prakash Nair
The evolution of sphenoid sinus meningoencephalocoeles and cerebrospinal fluid (CSF) rhinorrhoea is poorly understood. We present a case demonstrating the gradual evolution of encephalocoeles from both the lateral walls of a previously normal sphenoid sinus in a patient with dural arteriovenous fistula (DAVF), the CSF leak which developed following staged embolisation of the DAVF was managed by an endoscopic endonasal transpterygoid approach. Our findings suggest that over a period of time, chronic elevation of intracranial pressure (ICP) results in gradual erosion of the lateral wall of the sphenoid with development of meningoencephalocoeles and CSF leaks...
February 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28214635/secondary-craniofacial-sarcomas-following-retinoblastoma-a-systematic-review
#14
REVIEW
Ryuya Yamanaka, Azusa Hayano
OBJECTIVE: We conducted the largest systematic review of individual patient data to characterize secondary craniofacial sarcomas following retinoblastoma. METHODS: We conducted a systemic search of the PubMed databases, and compiled a comprehensive literature review. Student t-tests were used to evaluate differences between variables. Kaplan-Meier analysis was used to estimate survival. Statistical significance was assessed by using a log-rank test. RESULTS: We analyzed 220 cases of secondary craniofacial sarcomas, including 112 osteosarcomas...
February 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28214544/can-functional-magnetic-resonance-imaging-studies-help-with-the-optimization-of-health-messaging-for-lifestyle-behavior-change-a-systematic-review
#15
REVIEW
Maxine E Whelan, Paul S Morgan, Lauren B Sherar, Mark W Orme, Dale W Esliger
Unhealthy behaviors, including smoking, poor nutrition, excessive alcohol consumption, physical inactivity and sedentary lifestyles, are global risk factors for non-communicable diseases and premature death. Functional magnetic resonance imaging (fMRI) offers a unique approach to optimize health messages by examining how the brain responds to information relating to health. Our aim was to systematically review fMRI studies that have investigated variations in brain activation in response to health messages relating to (i) smoking; (ii) alcohol consumption; (iii) physical activity; (iv) diet; and (v) sedentary behavior...
February 15, 2017: Preventive Medicine
https://www.readbyqxmd.com/read/28214519/detection-and-quantification-of-soil-transmitted-helminths-in-environmental-samples-a-review-of-current-state-of-the-art-and-future-perspectives
#16
REVIEW
Isaac Dennis Amoah, Gulshan Singh, Thor Axel Stenström, Poovendhree Reddy
It is estimated that over a billion people are infected with soil-transmitted helminths (STHs) globally with majority occurring in tropical and subtropical regions of the world. The roundworm (Ascaris lumbricoides), whipworm (Trichuris trichiura), and hookworms (Anclostoma duodenale and Necator americanus) are the main species infecting people. These infections are mostly gained through exposure to faecally contaminated water, soil or contaminated food and with an increase in the risk of infections due to wastewater and sludge reuse in agriculture...
February 15, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28214498/vasculitic-and-autoimmune-wounds
#17
REVIEW
Victoria K Shanmugam, Divya Angra, Hamza Rahimi, Sean McNish
OBJECTIVE: Chronic wounds are a major cause of morbidity and mortality. Approximately 20% to 23% of nonhealing wounds that are refractory to vascular intervention have other causes, including vasculitis, pyoderma gangrenosum, and other autoimmune diseases. The purpose of this article was to review the literature across medical and surgical specialties with regard to refractory chronic wounds associated with vasculitis and autoimmune diseases and to delineate clinical outcomes of these wounds in response to vascular and other interventions...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28214496/new-diagnostic-modalities-in-the-evaluation-of-lymphedema
#18
REVIEW
Thomas F O'Donnell, John C Rasmussen, Eva M Sevick-Muraca
OBJECTIVE: Currently, lymphedema (LED) is typically diagnosed clinically on the basis of a patient's history and characteristic physical findings. Whereas the diagnosis of LED is sometimes confirmed by lymphoscintigraphy (LSG), the technique is limited in both its ability to identify disease and to guide therapy. Recent advancements provide opportunities for new imaging techniques not only to assist in the diagnosis of LED, based on anatomic changes, but also to assess contractile function and to guide therapeutic intervention...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28214469/cost-benefit-analysis-of-chlamydia-trachomatis-screening-in-pregnant-women-in-a-high-burden-setting-in-the-united-states
#19
Jared Ditkowsky, Khushal H Shah, Margaret R Hammerschlag, Stephan Kohlhoff, Tamar A Smith-Norowitz
BACKGROUND: Chlamydia trachomatis is the most common bacterial sexually transmitted infection (STI) in the United States (U.S.) [1] and remains a major public health problem. We determined the cost- benefit of screening all pregnant women aged 15-24 for Chlamydia trachomatis infection compared with no screening. METHODS: We developed a decision analysis model to estimate costs and health-related effects of screening pregnant women for C. trachomatis in a high burden setting (Brooklyn, NY)...
February 18, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28214464/cell-based-treatment-for-the-management-of-articular-cartilage-injuries-where-are-we
#20
William Rossy, Eric Strauss
Articular cartilage is a specialized tissue that lines the surface of joints. Injuries to articular cartilage pose challenges due to poor healing potential. Focal cartilage defects are typically the result of high impact or repetitive loads to the articular surface. They tend to occur in the younger, active population and have been shown to cause swelling, pain, and joint dysfunction. Although the natural history of these lesions has never been definitively elucidated in the literature, clinical experience suggests that if left untreated, these lesions will demonstrate an inability to heal and may lead to prolonged increased articular peak stresses, which in turn may lead to pain and significant limitations in the future...
January 2017: Bulletin of the Hospital for Joint Diseases
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