• To analyse inter-observer variation between a neuroradiologist and neurosurgeon in the MRI diagnosis of lumbar nerve root compression. (aku.edu)
  • Background A Urological Pathology External Quality Assurance (EQA) Scheme in the UK has reported observer variation in the diagnosis and grading of adenocarcinoma in prostatic biopsies using basic κ statistics, which rate all disagreements equally. (bmj.com)
  • Recognising the need for prompt diagnosis and management of patients with IPF, and the limitations of the existing NICE guideline, Thorax undertook an electronic poll that suggests that currently there is significant variation in management of patients with IPF (see online supplement), and therefore convened an advisory round-table discussion to highlight problem areas and agree additional recommendations to improve care. (bmj.com)
  • The study, published in the September issue of the American Journal of Gastroenterology , found that the diagnosis of Barrett's esophagus and associated dysplasia using WATS 3D has a rate of inter-observer agreement that is significantly higher than published estimates for standard manual microscopic assessment. (marketwired.com)
  • The high rates of inter-observer variability among pathologists evaluating Barrett's esophagus complicate diagnosis and risk stratification and can confound the gastroenterologist's ability to make effective treatment decisions for the patient. (marketwired.com)
  • The histopathological diagnosis of Barrett's esophagus-associated dysplasia has poor inter-observer agreement even among experienced gastrointestinal pathologists. (marketwired.com)
  • One of the most meaningful findings in this study is the high inter-observer agreement for the diagnosis of low-grade dysplasia, which has historically had the lowest rate of agreement even among expert pathologists," said Lauren Gerson MD, MSc, Associate Clinical Professor of Medicine, University of California San Francisco. (marketwired.com)
  • A secondary outcome was intra- and inter-observer agreement for the presence or absence of ECG criteria defined in the algorithm. (nih.gov)
  • Inter-observer agreement between neuroradiologist and neurosurgeon in diagnosing nerve root compression due to lumbar disc disease was excellent. (aku.edu)
  • This has historically been hampered by low inter-observer agreement among pathologists when examining esophageal tissue samples using a standard manual microscope. (marketwired.com)
  • CDx Diagnostics today announced results from a study examining inter-observer agreement rates among pathologists using the WATS 3D three dimensional computer-assisted biopsy system. (marketwired.com)
  • In the study evaluating inter-observer agreement with WATS 3D , a total of 149 Barrett's esophagus slides were evaluated in a blinded manner by four pathologists. (marketwired.com)
  • Inter-observer agreement between any two pathologists ranged between 0.83 and 0.89. (marketwired.com)
  • This may potentially explain the high inter-observer agreement observed in the study. (marketwired.com)
  • Observer variation in grading sacroiliac radiographs might be a cause of 'sacroiliitis' reported in certain disease states. (bmj.com)
  • The intraobserver agreement between the grade of the biopsy and the corresponding main tumour varied from 56-69% but only 52% of the poorly differentiated tumours were diagnosed as such in the preoperative biopsy by the "specialist" observer. (bmj.com)
  • Although the inter- and intraobserver variation was quite high, all observers found the expected changes in patients with AS. (bmj.com)
  • We aimed to explore observer variation in the assessment of outcome in a recently completed trial of dexanabinol in head injury and to consider steps to reduce such variation. (stir.ac.uk)
  • Wilson JTL, Slieker F, Legrand V, Murray G, Stocchetti N & Maas AIR (2007) Observer Variation in the Assessment of Outcome in Traumatic Brain Injury: Experience From A Multicenter, International Randomized Clinical Trial, Neurosurgery, 61 (1), pp. 123-129. (stir.ac.uk)
  • Another potential source of variation is the influence of clinical information on image assessment. (docplayer.net)
  • Most of the variation in disease risk comes from an enormous number of very tiny effects" in genes, agreed Stanford University genetics professor Jonathan Pritchard . (wn.com)
  • These methods revealed significant overall agreement but the levels for some observer pairs did not differ significantly from chance. (bmj.com)
  • The course covers methods for design and analysis of linear digital control systems including linearization, sampling in control systems, state space methods including solutions, controllability, observability, pole assignment and stabilization, observers, LQR design, and introduction to the Kalman Filter. (umd.edu)
  • The differences among flux profiles are the result of the way each observer establishes a magnetic connection with the shock front, and we found that changes in the observer's latitude may result in intensity changes of up to one order of magnitude at the two radial distances considered here. (springer.com)
  • However, disagreements between observers were in many instances "haphazard" and there were differences in bias between them. (bmj.com)
  • We pooled the differences in effect size using inverse variance random-effects meta-analysis and used metaregression to identify potential reasons for variation. (cmaj.ca)
  • 2 Earlier attempts to account for these variations emphasised differences in patterns of adult smoking and blood pressure. (bmj.com)
  • These findings suggest that individual differences in stress reactivity and maternal care can be transmitted across generations through a behavioral mode of transmission linked to variations in maternal behavior. (pnas.org)
  • For example, differences in microwear patterns may arise as a result of variation in the physical properties of enamel (e.g. hardness, enamel folding, crystallinity), tooth morphology (e.g. selenodont, hypselodont, bunodont), mastication biomechanics (i.e. jaw movements) and various physical aspects of ingested abrasives (e.g. hardness, structure and angularity), which include biogenic silica from plants (i.e. phytoliths) and abiotic silica from soil and dust. (biologists.org)
  • Recent textbooks on diagnostic research recommend blinding observers to reduce variation [7, (docplayer.net)
  • This book presents the technology evaluation methodology from the point of view of radiological physics and contrasts the purely physical evaluation of image quality with the determination of diagnostic outcome through the study of observer performance. (routledge.com)
  • This book will benefit individuals interested in observer performance evaluations in diagnostic medical imaging and provide additional insights to those that have worked in the field for many years. (routledge.com)
  • As opposed to most of the books with a primary statistical orientation, this book presents the technology evaluation methodology from the point of view of radiological physics and contrasts the purely physical evaluation of image quality with the determination of diagnostic outcome through the study of observer performance. (routledge.com)
  • Variation in MRI Evaluation of Disk Herniation Observer Variation in MRI Evaluation of Patients Suspected of Lumbar Disk Herniation Jeroen C. van Rijn 1 Nina Klemetsö 2 Johannes B. Reitsma 1 Charles B. L. M. Majoie 2 Frans J. Hulsmans 2 Wilco C. Peul 3 Jan Stam 4 Patrick M. Bossuyt 1 Gerard J. den Heeten 2 Van Rijn JC Klemetso N, Reitsma J, Majoie C, Hulsmans F OBJECTIVE. (docplayer.net)
  • Our objective was to assess observer variation in MRI evaluation in patients suspected of lumbar disk herniation. (docplayer.net)
  • In this prospective cohort study, we investigated observer variation in MRI evaluation for patients suspected of lumbar herniations by quantifying the amount of agreement between observers. (docplayer.net)
  • Observer variation in MRI evaluation of patients with suspected lumbar" by Imaad-ur Rehman, Rana Shoaib Hamid et al. (aku.edu)
  • Most glycomics studies have focused on understanding disease mechanisms and proposing serum markers for various diseases, yet the influence of ethnic variation on the identified glyco-biomarker remain. (bioportfolio.com)
  • Since then, surveillance for a variety of diseases has established that regular seasonal variation in incidence is the rule, rather than the exception, for acute infections. (cdc.gov)
  • Examination for observer bias indicated differing standards of grading, and haphazard disagreements reached high levels for some observer pairs. (bmj.com)
  • Does ethnic diversity explain intra-UK variation in mortality? (bioportfolio.com)
  • The geographic variation in mortality from cardiovascular disease across Great Britain, with the lowest rates in the south east and the highest in south Wales, northern England, and Scotland, is well described 1 but poorly understood. (bmj.com)
  • Seasonal variations should be distinguished from periodic large epidemics, as observed every 2 years for measles ( 2 ) or at less frequent and more irregular intervals for meningococcal meningitis ( 3 ) and rubella ( 4 ). (cdc.gov)
  • In this paper an LPV observer-based strategy is proposed aimed at rejecting periodic disturbances under variable frequency conditions. (hindawi.com)
  • The proposed observer is formulated such that it includes an internal model of a periodic signal. (hindawi.com)
  • To tackle this issue, we created monthly predictive cetacean distribution maps for spring and summer months, using data collected by the Azores Fisheries Observer Programme between 2004 and 2009. (frontiersin.org)
  • The target observer generates a target position to the sliding mode controller based on position and velocity data. (google.com)
  • We conclude that high observer variation in interpreting a film of the anteroposterior (AP) view of the pelvis for sacroiliitis may be a major cause of reported 'sacroiliitis' in BS and FMF. (bmj.com)
  • a High Order Repetitive Controller (HORC) is presented in [ 12 ] which is robust against frequency variations and [ 13 , 14 ] propose a varying sampling controller for which the frequency discrete representation remains invariant. (hindawi.com)
  • Lumbar discs at L3-L4, L4-L5 and L5-S1 levels were evaluated by both observers for disc disease and nerve compression. (aku.edu)