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Clinical decision rules

Jingxiang Chen, Haoda Fu, Xuanyao He, Michael R Kosorok, Yufeng Liu
Precision medicine is an emerging scientific topic for disease treatment and prevention that takes into account individual patient characteristics. It is an important direction for clinical research, and many statistical methods have been proposed recently. One of the primary goals of precision medicine is to obtain an optimal individual treatment rule (ITR), which can help make decisions on treatment selection according to each patient's specific characteristics. Recently, outcome weighted learning (OWL) has been proposed to estimate such an optimal ITR in a binary treatment setting by maximizing the expected clinical outcome...
March 13, 2018: Biometrics
Ronald W Gimbel, Ronald G Pirrallo, Steven C Lowe, David W Wright, Lu Zhang, Min-Jae Woo, Paul Fontelo, Fang Liu, Zachary Connor
BACKGROUND: The frequency of head computed tomography (CT) imaging for mild head trauma patients has raised safety and cost concerns. Validated clinical decision rules exist in the published literature and on-line sources to guide medical image ordering but are often not used by emergency department (ED) clinicians. Using simulation, we explored whether the presentation of a clinical decision rule (i.e. Canadian CT Head Rule - CCHR), findings from malpractice cases related to clinicians not ordering CT imaging in mild head trauma cases, and estimated patient out-of-pocket cost might influence clinician brain CT ordering...
March 12, 2018: BMC Medical Informatics and Decision Making
Ángel Herráiz-Adillo, Iván Cavero-Redondo, Celia Álvarez-Bueno, Johana Bidner, Vicente Martínez-Vizcaíno, Blanca Notario-Pacheco
BACKGROUND AND AIMS: The diagnostic performance of the oscillometric ankle brachial index (ABI) to detect peripheral arterial disease (PAD) varies among populations, suggesting a spectrum effect. When this heterogeneity modifies post-test probabilities, a spectrum bias arises. This study evaluates the presence and influence of spectrum effect and spectrum bias on test performance and clinical decisions. METHODS: Oscillometric and Doppler ABI were compared in two settings: Primary-Care (333 legs) and Vascular-Service (41 legs)...
March 2, 2018: Atherosclerosis
L Monge Galindo, A L Martínez de Morentín, V Pueyo Royo, J P García Iñiguez, S Sánchez Marco, J López-Pisón, J L Peña-Segura
INTRODUCTION AND OBJECTIVE: In this article, we present our experience on optic neuritis (ON) and provide a diagnostic/therapeutic protocol, intended to rule out other aetiologies (particularly infection), and a fact sheet for parents. MATERIAL AND METHODS: We conducted a descriptive, retrospective study of patients with ON over a 27-year period (1990-2017). A review of the available scientific evidence was performed in order to draft the protocol and fact sheet...
March 8, 2018: Neurología: Publicación Oficial de la Sociedad Española de Neurología
Tony Lough, Qingyang Luo, Carthika Luxmanan, Alastair Anderson, Jimmy Suttie, Paul O'Sullivan, David Darling
BACKGROUND: The non-invasive Cxbladder urine test system has demonstrated clinical utility in ruling out urothelial carcinoma (UC) in patients with asymptomatic microscopic hematuria (AMH), suggesting that the number of invasive diagnostic tests, including cystoscopy, used in this patient population may be reduced by Cxbladder testing prior to conducting a full urological work-up. The aim of this study was to demonstrate the enhanced clinical utility of communicating objective information on diagnostic decisions made by individual physicians on individual patients with AMH...
March 9, 2018: BMC Urology
Edward W Randell, Garry Short, Natasha Lee, Allison Beresford, Margaret Spencer, Marina Kennel, Zoë Moores, David Parry
OBJECTIVE: This study examines effectiveness of a project to enhance an autoverification (AV) system through application of Six Sigma (DMAIC) process improvement strategies. DESIGN AND METHODS: Similar AV systems set up at three sites underwent examination and modification to produce improved systems while monitoring proportions of samples autoverified, the time required for manual review and verification, sample processing time, and examining characteristics of tests not autoverified...
March 5, 2018: Clinical Biochemistry
Corinne M Hohl, Katherin Badke, Amy Zhao, Maeve E Wickham, Stephanie A Woo, Marco L A Sivilotti, Jeffrey J Perry
OBJECTIVES: Adverse drug events cause or contribute to one in nine emergency department presentations in North America, and are often misdiagnosed. Emergency departments have insufficient clinical pharmacists to complete medication reviews in all incoming patients, even though pharmacist-led medications reviews have been associated with improved health outcomes. Our objective was to validate clinical decision rules to identify patients presenting with adverse drug events so they could be prioritized for pharmacist-led medication review...
March 8, 2018: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
Ulrik Nikolaj Ascanius Felding
Isolated fractures of the orbital floor or medial wall are often referred to as blowout fractures (BOFs). Debilitating double vision and aesthetic deformity may affect the patients' quality of life and daily living skills, for instance, working or driving a car. The management of blowout fractures is, however, challenging, since not all fractures demand surgery. Some patients may have symptoms which subside, or may never develop symptoms. Due to a lack of evidence, there are still considerable differences in opinion on the criteria for surgery...
March 2018: Danish Medical Journal
Martijn Bouwknegt, Brecht Devleesschauwer, Heather Graham, Lucy J Robertson, Joke Wb van der Giessen, The Euro-Fbp Workshop Participants
Background and aimsPriority setting is a challenging task for public health professionals. To support health professionals with this and in following a recommendation from the Food and Agriculture Organization of the United Nations (FAO) and World Health Organization (WHO), 35 European parasitologists attended a workshop from 8-12 February 2016 to rank food-borne parasites (FBP) in terms of their importance for Europe and regions within Europe. Methods: Countries were divided into European regions according to those used by the European Society of Clinical Microbiology and Infectious Diseases...
March 2018: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
Nancy Glober, Christopher R Tainter, Jesse Brennan, Mark Darocki, Morgan Klingfus, Michelle Choi, Brenna Derksen, Frances Rudolf, Gabriel Wardi, Edward Castillo, Theodore Chan
BACKGROUND: Assessment for pulmonary embolism (PE) in the emergency department (ED) remains complex, involving clinical decision tools, blood tests, and imaging. OBJECTIVE: Our objective was to examine the test characteristics of the high-sensitivity d-dimer for the diagnosis of PE at our institution and evaluate use of the d-dimer and factors associated with a falsely elevated d-dimer. METHODS: We retrospectively collected data on adult patients evaluated with a d-dimer and computed tomography (CT) pulmonary angiogram or ventilation perfusion scan at two EDs between June 4, 2012 and March 30, 2016...
March 1, 2018: Journal of Emergency Medicine
Angela Arenas Massa, Andrea Slachevsky Chonchol
In Chile, more than 180 thousand people (1% of the population) have some form of dementia. The figure should increase to approximately 600,000 (3% of Chileans) by 2050. This disease poses major challenges to the society. One of them is the effective recognition of the autonomy and responsibility of the person living with this condition. This article aims to review the clinical assessment of competence, its agreement with the Chilean legal system and the challenges that the assessment of competence poses in clinical decision-making and the capacity of an individual make decisions, according to the new international obligations subscribed by Chile...
October 2017: Revista Médica de Chile
Georgi Tchernev, Torello Lotti, Uwe Wollina, José Carlos Cardoso, Lyubomira Viktor Popova, Georgi Konstantinov Maximov, Ilia Lozev, Ivan Terziev
The pathogenesis, diagnosis and therapy of sarcoidosis as an autonomous disease are subjects of spirited discussions, which haven't found definitive conclusion yet. Distinguishing between sarcoidosis and sarcoid-like reactions (sarcoid - type granulomas) is not currently a medical "gold standard" and is not implemented in clinical practice. This leads to 1) misinterpretation of numerous available data; 2) difficulty in the interpretation of other unverified data, which is often followed by 3) inappropriate or inadequate therapeutic approach...
January 25, 2018: Open Access Macedonian Journal of Medical Sciences
Raheleh Davoodi, Mohammad Hassan Moradi
Electronic health records (EHRs) contain critical information useful for clinical studies. Early assessment of patients' mortality in intensive care units is of great importance. In this paper, a Deep Rule-Based Fuzzy System (DRBFS) was proposed to develop an accurate in-hospital mortality prediction in the intensive care unit (ICU) patients employing a large number of input variables. Our main contribution is proposing a system, which is capable of dealing with big data with heterogeneous mixed categorical and numeric attributes...
February 19, 2018: Journal of Biomedical Informatics
Alex M Glazer, Aaron S Farberg, Richard R Winkelmann, Natalie Tucker, Darrell S Rigel
Background/Study Aim: A multispectral digital skin lesion analysis (MSDSLA) device has proven to be sensitive and specific for malignant melanoma (MM) detection by dermatologists and may have other useful applications. This study aimed to develop and test objective quantitative Asymmetry, Border irregularity, Color, and Diameter (qABCD) parameters for MSDSLA and correlate them with the presence of clinical ABCD features to aid the decision to biopsy a suspicious pigmented skin lesions (PSLs). METHODS: 1632 benign and malignant [175 MM/High Grade Dysplastic Nevi (HGDN)] were evaluated for their qABCD parameters...
August 15, 2017: Dermatology Online Journal
Olle Ten Cate, Jan Borleffs, Marijke van Dijk, Tineke Westerveld
AIM: The aim of this report, written for the 40th anniversary issue of Medical Teacher, is to document 20 years of development of the Utrecht undergraduate medical curriculum, as both to exhibit accountability and to inform the community of the process and choices that can be made in long-term curriculum development. METHODS: We used the SPICES model, created by Medical Teacher's Editor Ronald Harden and colleagues in 1984. RESULTS: The Utrecht six-year program, now called "CRU+", has many distinct features that were introduced, most of which are well documented...
February 22, 2018: Medical Teacher
Eric B Laber, Fan Wu, Catherine Munera, Ilya Lipkovich, Salvatore Colucci, Steve Ripa
There is growing interest and investment in precision medicine as a means to provide the best possible health care. A treatment regime formalizes precision medicine as a sequence of decision rules, one per clinical intervention period, that specify if, when and how current treatment should be adjusted in response to a patient's evolving health status. It is standard to define a regime as optimal if, when applied to a population of interest, it maximizes the mean of some desirable clinical outcome, such as efficacy...
February 21, 2018: Statistics in Medicine
Pedro Romero-Aroca, Aida Valls-Mateu, Antonio Moreno-Ribas, Ramon Sagarra-Alamo, Josep Basora-Gallisa, Emran Saleh, Marc Baget-Bernaldiz, Domenec Puig
BACKGROUND: The aim of this study was to build a clinical decision support system (CDSS) in diabetic retinopathy (DR), based on type 2 diabetes mellitus (DM) patients. METHOD: We built a CDSS from a sample of 2,323 patients, divided into a training set of 1,212 patients, and a testing set of 1,111 patients. The CDSS is based on a fuzzy random forest, which is a set of fuzzy decision trees. A fuzzy decision tree is a hierarchical data structure that classifies a patient into several classes to some level, depending on the values that the patient presents in the attributes related to the DR risk factors...
February 21, 2018: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
T E van Mens, L M van der Pol, N van Es, I M Bistervels, A T A Mairuhu, T van der Hulle, F A Klok, M V Huisman, S Middeldorp
BACKGROUND: In patients suspected of pulmonary embolism (PE), clinical decision rules are combined with D-dimer testing to rule out PE, avoiding the need for imaging in those at low risk. Despite sex-differences in several disease aspects including its diagnosis, these algorithms are used indiscriminately in women and men. OBJECTIVES: To compare the performance, defined as efficiency and failure rate, of three pre-imaging diagnostic algorithms for PE between women and men: the Wells rule with fixed or with age adjusted D-dimer cutoff, and a recently validated algorithm (YEARS)...
February 20, 2018: Journal of Thrombosis and Haemostasis: JTH
Naichuan Su, Arjen J van Wijk, Corine M Visscher, Frank Lobbezoo, Geert J M G van der Heijden
OBJECTIVES: The aim was to assess the added diagnostic value of ultrasonography (US) for establishing the presence or absence of disc displacements (DDs) in temporomandibular joints (TMJs). MATERIALS AND METHODS: Pubmed and EMBASE were searched electronically to identify diagnostic accuracy studies that assessed the diagnostic value of US for the diagnosis of DD, using Magnetic resonance imaging (MRI) as the reference standard. Meta-analyses were performed with Metadisc 1...
February 17, 2018: Clinical Oral Investigations
Franz E Babl, Ed Oakley, Stuart R Dalziel, Meredith L Borland, Natalie Phillips, Amit Kochar, Sarah Dalton, John A Cheek, Yuri Gilhotra, Jeremy Furyk, Jocelyn Neutze, Susan Donath, Stephen Hearps, Charlotte Molesworth, Louise Crowe, Silvia Bressan, Mark D Lyttle
STUDY OBJECTIVE: Three clinical decision rules for head injuries in children (Pediatric Emergency Care Applied Research Network [PECARN], Canadian Assessment of Tomography for Childhood Head Injury [CATCH], and Children's Head Injury Algorithm for the Prediction of Important Clinical Events [CHALICE]) have been shown to have high performance accuracy. The utility of any of these in a particular setting depends on preexisting clinician accuracy. We therefore assess the accuracy of clinician practice in detecting clinically important traumatic brain injury...
February 13, 2018: Annals of Emergency Medicine
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