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An exotic Cretaceous kimberlite linked to metasomatized lithospheric mantle beneath the southwestern margin of the S?o Francisco Craton,Brazil

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Geoscience Frontiers 2022年第1期13卷 182-203页

作者： Luísa D.V.Carvalho Tiago Jalowitzki Ricardo Scholz guilherme o.gonça.ves Marcelo Peres Rocha Rogério Silvestre Pereira Cristiano Lana Marco Paulo de Castro Gláucia Queiroga Reinhardt A.Fuck Universidade Federal de ouro Preto(UFoP) Escola de MinasDepartamento de GeologiaCampus Morro do Cruzeiro35400-000 Ouro PretoMGBrazil Universidade de Brasília(UnB) Instituto de GeociênciasCampus Universitário Darcy Ribeiro70910-900 BrasíliaDFBrazil Independent Geologist Consultant

We present major and trace element compositions of mineral concentrates comprising garnet xenocrysts,ilmenite,phlogopite,spinel,zircon,and uncommon minerals(titanite,calzirtite,anatase,baddeleyite and pyrochlore)of a newly discovered Late Cretaceous kimberlite(U-Pb zircon age 90.0±1.3 Ma;2σ)named osvaldo Franca 1,located in the Alto Paranaíba Igneous Province(APIP),southeastern Brazil.Pyrope grains are lherzolitic(Lherz-1,Lherz-2 and Lherz-3),harzburgitic(Harz-3)and wehrlitic(Wehr-2).The pyrope xenocrysts cover a wide mantle column in the subcratonic lithosphere(66–143 km;20–43 kbar)at relatively low temperatures(811–875°C).The shallowest part of this mantle is represented by Lherz-1 pyropes(20–32 kbar),which have low-Cr(Cr_(2)o_(3)=1.74–6.89 wt.%)and fractionated middle to heavy rare earth elements(MREE-HREE)pattern.The deepest samples are represented by Lherz-2,Lherz-3,Harz-3,and Wehr-2 pyropes(36–43 kbar).They contain high-Cr contents(Cr_(2)o_(3)=7.36–11.19 wt.%)and are characterized by sinusoidal(Lherz-2 and Wehr-2)and spoon-like(Lherz-3 and Harz-3)REE patterns.According to their REE and trace elements,pyrope xenocrysts have enriched nature(e.g.,Ce and Yb vs.Cr_(2)o_(3)),indicating that the cratonic lithosphere has been affected by a silicate melt with subalkaline/tholeiite composition due to their low Zr,Ti and Y concentrations.Besides minerals with typical kimberlitic signatures,such as ilmenite and zircon,the exotic compositions of phlogopite and ulvöspinel suggest an enriched component in the magma source.The formation of rare mineral phases with strong enrichment of light-REE(LREE)and high field strength elements(HFSE)is attributed to the late-stage kimberlitic melt.We propose a tectonic model where a thermal anomaly,represented by the low-velocity seismic anomaly observed in P-wave seismic tomography images,supplied heat to activate the alkaline magmatism from a metasomatized cratonic mantle source during the late-stages of gondwana fragmentation and consequent South Atlantic ocean opening.The metasomat

关键词： osvaldo França 1 kimberlite Alto Paranaíba Igneous Province Metasomatized cratonic lithosphere Zircon U-Pb geochronology

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Prevalence and risk factors for acquired long QT syndrome in the emergency department:a retrospective observational study

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World Journal of Emergency Medicine 2023年第6期14卷 454-461页

作者： Diogo de Almeida Fernandes guilherme de Freitas Camoes Diana Ferreira Carolina Queijo Carlos Fontes-Ribeiro Lino.gonga.ves Rui Pina Natalia Antonio Department of Cardiology Coimbra Hospital and University Centre(CHUC)Coimbra 3000-075Portugal Department of Internal Medicine Coimbra Hospital and University Centre(CHUC)Coimbra 3000-075Portugal Faculty of Medicine University of CoimbraCoimbra 3000-370Portugal Institute for Clinical and Biomedical Research Faculty of MedicineUniversity of CoimbraCoimbra 3000-548Portugal

BACKGRoUND: Long QT syndrome(LQTS) is a heterogeneous syndrome that may be congenital or, more frequently, acquired. The real-world prevalence of acquired LQTS(aLQTS) in the emergency department(ED) remains to be determined. The aim of this study was to determine prevalence of aLQTS and its impact on symptoms on ED admissions.METHoDS: Electrocardiograms(ECG) of 5,056 consecutively patients admitted in the ED of a tertiary hospital between January 28th and March 17th of 2020 were reviewed. All patients with aLQTS were included. Clinical data with a focus on QT prolonging drugs and clinical factors were recorded. Statistical comparison was made between the groups with and without corrected QT(QTc) interval greater than 500 ms(value that is considered severely increased).RESULTS: A total of 383 ECGs with prolonged QTc were recognized, corresponding to a prevalence of aLQTS at admission of 7.82%. Patients with aLQTS were more commonly men(53.3%) with an age of(73.49±14.79) years old and QTc interval of(505.3±32.4) ms. only 20.4% of these patients with aLQTS were symptomatic. No ventricular arrhythmias were recorded. Patients with QT interval greater than 500 ms were more frequently female(59.5%;Pore frequently on QT prolonging drugs(77.3%;P=0.025). Main contributing factor was intake of antibiotics(odds ratio [oR] 4.680) followed by female gender(oR 2.473) and intake of antipsychotics(oR 1.925).CoNCLUSIoN: aLQTS is particularly prevalent in the ED. Female patients on antibiotics and antipsychotics are at particularly high risk. Efforts must be made to avoid, detect and treat aLQTS as early as possible.

关键词： Long QT syndrome Epidemiology Drug interactions Emergency department

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Geochemical study of submicron particulate matter(PM1)in a metropolitan area

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Geoscience Frontiers 2022年第1期13卷 417-429页

作者： Ismael L.Schneider Elba C.Teixeira guilherme L.Dotto Diana Pinto Cheng-Xue Yang Luis F.o.Silva Postgraduate Program in Remote Sensing and Meteorology Universidade Federal do Rio Grande do SulAv.Bento Gonçalves9500 Porto AlegreRSBrazil Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55-66BarranquillaAtlanticoColombia Research Department Fundação Estadual de Proteção Ambiental Henrique Luís RoesslerAv.Borges de Medeiros261Porto AlegreRSBrazil Chemical Engineering Department Federal University of Santa Maria97105-900 Santa MariaBrazil School of Earth Sciences and Resources China University of Geosciences BeijingBeijing 100083PR China Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600–Santiago de Surco 1503Perú

Air pollution has become a major problem in urban areas due to increasing industrialization and urbanization.In this study ambient concentrations of PM1 and metal concentrations as well as source contributions were identified and quantified by using Positive Matrix Factorization(PMF)in receptor modeling in the Metropolitan Area of Porto Alegre,Brazil.The PM1 samples were collected on PTFE filters from December 2012 to December 2014 in two sampling sites.Major ion and trace element concentrations were assessed.The average concentrations were 12.8 and 15.2μg/m^(3) for Canoas and Sapucaia do Sul sites,respectively.Major ion contributions of PM1 were secondary pollutants such as sulfate and nitrate.Trace elements,especially Cu,Pb,Zn,Cd,and Ni also made important contributions which are directly associated with anthropogenic contributions.our results show significantly higher levels in winter than in summer.Most of the PM1 and the analyzed PM species and elements originated from anthropogenic sources,especially road traffic,combustion processes and industrial activities,which are grouped in 7 major contributing sources.A back-trajectory analysis showed that the long-range transport of pollutants was not relevant in relation to the contribution to PM1 and metal concentrations.This work highlights the importance of urban planning to reduce human health exposure to traffic and industrial emissions,combined with awareness-raising actions for citizens concerning the impact of indoor sources.

关键词： PM1 Trace elements Source apportionment PMF Back trajectory

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Magnetic bearings with double crossed loops modelled with T-A formulation and electric circuits

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Superconductivity 2023年第3期7卷 65-74页

作者： Bárbara Maria oliveira Santos Gabriel dos Santos Flávio Goulart dos Reis Martins Felipe Sass guilherme gonça.ves Sotelo Rubens de Andrade Junior Francesco Grilli Electrical Engineering Department Rio de Janeiro State UniversityRio de Janeiro20550-900Rio de JaneiroBrazil Electrical Engineering Department Universidade Federal FluminenseNiterói24210-240Rio de JaneiroBrazil Electrical Engineering Department Universidade Federal do Rio de JaneiroRio de Janeiro21941-909Rio de JaneiroBrazil Institute for Technical Physics Karlsruhe Institute of TechnologyKarlsruhe76131Germany

The application of High‐Temperature Superconductor(HTS)coils made of coated conductors has been investigated for many years.A possible configuration for such coils is the jointless loop,also known as the ring coil.The double crossed loop coil(DCLC)has been successfully applied in superconducting magnetic bearings(SMBs).The design of SMBs with DCLCs requires flexible modelling to allow all parts of the device to be represented.This work proposes the T‐A formulation with a thin‐film approximation for modelling SMB with DCLCs in the finite element analysis framework.A 2D representation of the system is coupled with an external electric circuit to model the continuity of the lines that represent the parts of each jointless loop.To couple the T‐A formulation and the circuit,an average of the total electric field,with both resistive and inductive components,is applied to the circuit.The total current computed by the circuit is applied to the T‐A formulation.The proposed methodology was validated by comparison with levitation force experimental data.Two types of tests were simulated:five levitation force tests and three guidance force tests.It is shown that there is a limit to the behaviour of the levitation force related to the high‐loss state.Below this limit,the stack of DCLCs behaves as an equivalent bulk.Beyond this limit,a high‐loss state appears as a linear growth of the levitation force.It is also shown that this high‐loss state in vertical displacement influences the lateral force.

关键词： Coated conductors Jointless loops T‐A formulation

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J-A formulation: A finite element methodology for simulating superconducting devices

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Superconductivity 2023年第2期6卷 64-73页

作者： Gabriel dos Santos Bárbara Maria oliveira Santos Felipe Sass Flávio Goulart dos Reis Martins guilherme gonça.ves Sotelo Rubens de Andrade Junior Federal Fluminense University Brazil State University of Rio de Janeiro Brazil Federal University of Rio de Janeiro Brazil

High‐temperature superconductors are a powerful technological option to be applied in the current scenario of energy transition.Their applications include fault current limiters,power electrical cables,and electrical machines,for example.Due to the non‐linearities of superconductors,it is computationally costly to run real models of superconducting equipment.Therefore,it is of paramount importance to have a reliable and fast formulation to model superconducting devices.This paper proposes a new hybrid J‐A formulation to simulate superconducting devices.The new formulation is validated with 5 case studies,some of which are benchmarks.The J‐A formulation agrees in all cases and has a smaller computation time when compared with the T‐A formulation.Moreover,due to the simple implementation,the proposed formulation allows the possibility of running the J and A formulations in the same order and presents itself as a potential feature to speed up and help the design of the superconducting devices.

关键词： High‐temperature superconductors Finite element method J‐A formulation

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A review of superconducting fault current limiters compared with other proven technologies

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Superconductivity 2022年第3期3卷 55-72页

作者： guilherme gonça.ves Sotelo Gabriel dos Santos Felipe Sass Bruno Wanderley França Daniel Henrique Nogueira Dias Marcio Zamboti Fortes Alexander Polasek Rubens de Andrade Jr. Fluminense Federal University(UFF) Electrical Engineering DepartmentNiteróiRio de JaneiroBrazil Electrical Energy Research Center(CEPEL) Rio de JaneiroRio de JaneiroBrazil Rio de Janeiro Federal University(UFRJ) Electrical Engineering DepartmentRio de JaneiroRio de JaneiroBrazil

Several substations in operation were commissioned decades ago.These substations are overstressed,then their protection equipment cannot provide an effective safety condition to the system.In the worst cases,short‐circuits can cause permanent damage to the system if the overcurrent is higher than the capacity of the installed equipment.There are some possible solutions for those cases:replace all the equipment in the overstressed substation,build a new one in parallel or install a fault current limiter(FCL)device.From an economic point of view,introducing FCLs in the power system is the best way to solve the described problem.The commercial solutions available are the pyrotechnic FCL,air coil reactor,neutral earthing resistor,and high impedance transformer.However,these devices are limited and present several drawbacks.Since the’70s,there has been a search for reliable FCL devices that do not interfere in the regular operation of substations and could limit the fault currents to the protection system rated level.There were so many FCL technologies proposed in the last decades.These proposed new devices may use superconducting technologies,power electronics,or both.This paper reviews proven FCL technologies,focusing on full‐scale devices demonstrated in field and lab tests.The goal is to introduce the main FCL technologies in development and discuss didactically their operation principle,the built prototypes,the commercial units,whether they exist,and the main drawbacks for each technology presented.A final analysis of the level of maturity for each FCL technology is discussed using the TRL(Technology readiness level)scale in order to find technologies with more potential for mass production.The three technologies closer to the full commercial application are:the Resistive Superconducting FCL,the Saturated Iron Core FCL,and the Series Reactor FCL.

关键词： Fault current limiter Short circuit Superconductor Power system protection

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Characterization of porous cobalt hexacyanoferrate and activated carbon electrodes under dynamic polarization conditions in a sodium-ion pseudocapacitor

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Journal of Energy Chemistry 2021年第3期30卷 53-62页

作者： Bruno Morandi Pires Willian gonca.ves Nunes Bruno guilherme Freitas Francisca Elenice Rodrigues oliveira Vera Katic Cristiane Barbieri Rodella Leonardo Morais Da Silva Hudson Zanin Advanced Energy Storage Division Manufacturing CroupCarbon Sci-Tech LabsCenter for Innovation on New EnergiesUniversity of CampinasCampinas 13083-852SPBrazil Brazilian Synchrotron Light Laboratory(LNLS/Brazilian Center of Energy and Materiab(CNPEM)) Campinas 13083-970SPBrazil Department of Chemistry Laboratory of Fundamental and Applied ElectrochemistryFederal University of Jequitinhonha and Mucuri's VatleyAlto dajacuba 39100-000Diamantina-MGBrazil

We report here the activated carbon and cobalt hexacyanoferrate composite,which is applied as the electrode materials in symmetric supercapacitors containing a 1.0 M Na_(2)So_(4) aqueous electrolyte.This novel material combines high specific surface area and electrochemical stability of activated carbon with the redox properties of cobalt hexacyanoferrate,resulting in maximum specific capacitance of 329 F g^(-1) with large voltage working window of 2.0 V.Electrochemical studies indicated that cobalt hexacyanoferrate introduces important pseudocapacitive properties accounting for the overall charge-storage process,especially when Iower gravimetric currents(e.g.,0.05 A g^(-1))and up to 1.0 V,the presence of cobalt hexacyanoferrate improves the specific energy for more than 300%.In addition,to better understanding the energy storage process we also provided a careful investigation of the electrode materials under dynamic polarization conditions using the in situ Raman spectroscopy and synchrotron light Xray diffraction techniques.Interesting complementary findings were obtained in these studies.We believe that this novel electrode material is promising for applications regarding the energy-storage process in pseudocapacitors with long lifespan properties.

关键词： operando studies Raman XRD synchrotron light Cobalt hexacyanoferrate Activated carbon High specific capacitance

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Quadruple therapy with furazolidone for retreatment in patients with peptic ulcer disease

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World Journal of Gastroenterology 2008年第40期14卷 6224-6227页

作者： guilherme Eduardo.gona.ves Felga Fernando Marcuz Silva Ricardo Correa Barbuti Tomás Navarro-Rodriguez Schlioma Zaterka Jaime Natan Eisig Department of Gastroenterology University of So PauloSchool of Medicine

AIM: To establish the efficacy and safety of a 7-d therapeutic regimen using omeprazole,bismuth subcitrate,furazolidone and amoxicillin in patients with peptic ulcer disease who had been previously treated with other therapeutic regimens without success.METHoDS: open cohort study which included patients with peptic ulcer who had previously been treated unsuccessfully with one or more eradication regimens.The therapeutic regimen consisted of 20 mg omeprazole,240 mg colloidal bismuth subcitrate,1000 mg amoxicillin,and 200 mg furazolidone,taken twice a day for 7 d.Patients were considered as eradicated when samples taken from the gastric antrum and corpus 12 wk after the end of treatment were negative for Helicobacter pylori (H pylori) (rapid urease test and histology).Safety was determined by the presence of adverse effects.RESULTS: Fifty-one patients were enrolled.The eradication rate was 68.8% (31/45).Adverse effects were reported by 31.4% of the patients,and these were usually considered to be slight or moderate in the majority of the cases.Three patients had to withdraw from the treatment due to the presence of severe adverse effects.CoNCLUSIoN: The association of bismuth,furazolidone,amoxicillin and a proton-pump inhibitor is a valuable alternative for patients who failed to respond to other eradication regimens.It is an effective,cheap and safe option for salvage therapy of positive patients.

关键词：胃溃疡十二指肠溃疡幽门痢特灵

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Review of anticancer mechanisms of isoquercitin

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世界临床肿瘤学杂志：英文版 2016年第2期7卷 189-199页

作者： guilherme di Camillo orfali Ana Carolina Duarte Vivien Bonadio Natalia Peres Martinez Maria Elisa Melo Branco de Araújo Fernanda Bruschi Marinho Priviero Patricia oliveira Carvalho Denise gon?a.ves Priolli Scientific Initiation Program Sao Francisco University Medical School Postgraduate Program in Health Science Sao Francisco University Medical School

This review was based on a literature search of PubM ed and Scielo databases using the keywords "quercetin,rutin,isoquercitrin,isoquercitin(IQ),quercetin-3-glucoside,bioavailability,flavonols and favonoids,and cancer" and combinations of all the words.We collected relevant scientific publications from 1990 to 2015 about the absorption,bioavailability,chemoprevention activity,and treatment effects as well as the underlying anticancer mechanisms of isoquercitin.Flavonoids are a group of polyphenolic compounds widely distributed throughout the plant kingdom.The subclass of flavonols receives special attention owing to their health benefits.The main components of this class are quercetin,rutin,and IQ,which is a flavonoid and although mostly found as a glycoside,is an aglycone(lacks a glycoside side chain).This compound presents similar therapeutic profiles to quercetin but with superior bioavailability,resulting in increased efficacy compared to the aglycone form.IQ has therapeutic applications owing to its wide range of pharmacological effects including antioxidant,antiproliferative,anti-inflammatory,anti-hypertensive,and anti-diabetic.The protective effects of IQ in cancer may be due to actions on lipid peroxidation.In addition,the antitumor effect of IQ and its underlying mechanism are related to interactions with Wnt signaling pathway,mixed-lineage protein kinase 3,mitogen-activated protein kinase,apoptotic pathways,as well proinflammatory protein signaling.This review contributed to clarifying the mechanisms of absorption,metabolism,and actions of IQ and isoquercitrin in cancer.

关键词： Drug screening assays Antitumor Cancer Flavonoids Flavonols Antioxidants Neoplasms

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Real-world disease activity and sociodemographic,clinical and treatment characteristics of moderate-to-severe inflammatory bowel disease in Brazil

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World Journal of Gastroenterology 2021年第2期27卷 208-223页

作者： Cyrla Zaltman Rogério Serafim Parra Ligia Yukie Sassaki Genoile oliveira Santana Maria de Lourdes Abreu Ferrari Sender J Miszputen Heda M B S Amarante Roberto Luiz Kaiser Junior Cristina Flores Wilson R Catapani JoséMiguel Luz Parente Mauro Bafutto odery Ramos Carolina D gonça.ves Isabella Miranda Guimaraes Jose J R da Rocha Marley R Feitosa omar Feres Rogerio Saad-Hossne Francisco guilherme Cancela Penna Pedro Ferrari Sales Cunha Tarcia NF Gomes Rodrigo Bremer Nones Mikaell Alexandre Gouvea Faria Mírian Perpétua Palha Dias Parente António S Scotton Rosana Fusaro Caratin Juliana Senra Júlio Maria Chebli Department of Internal Medicine Federal University of Rio de JaneiroRio de Janeiro 21941-913Brazil Department of Surgery and Anatomy Ribeirão Preto Medical SchoolUniversity of São PauloRibeirao Preto 14049-900São PauloBrazil Department of Internal Medicine São Paulo State University(UNESP)Medical SchoolBotucatu 18618-687São PauloBrazil IBD Unit Federal University of BahiaSalvador 41150-000BahiaBrazil Department of Clinical Medicine Medical SchoolUniversidade Federal de Minas GeraisBelo Horizonte 30130-100Minas GeraisBrazil Department of Gastroenterology Escola Paulista de MedicinaSão Paulo 04023-900Brazil Hospital de Clinicas Universidade Federal do ParanaCuritiba 80060-900ParanaBrazil Department of Proctology Beneficencia Portuguesa Hospital/Kaiser Day HospitalSao Jose do Rio Preto 15015110São PauloBrazil Department of Gastroenterology and Hepatology Sciences Hospital de ClínicasUniversidade Federal do Rio Grande do SulPorto Alegre 90560002Rio Grande do SulBrazil Department of Gastroenterology Faculdade de Medicina do ABCSanto Andre 09060-870São PauloBrazil Department of General Medicine Gastroenterology UnitUniversity HospitalFederal University of PiauiTeresina 64049-550PiauíBrazil Department of Gastroenterology Faculdade de MedicinaUniversidade Federal de GoiásGoiania 74535-170GoiasBrazil Department of Surgery Botucatu Medical School at São Paulo State University(UNESP)Botucatu 18618687São PauloBrazil Department of Gastroenterology UNIFESPSão Paulo 04040-002Brazil IBD unit Gastroenterology DepartmentHospital Nossa Senhora das GraçasCuritiba 80810-040ParanaBrazil Department of Proctology Kaiser Hospital DiaSao Jose do Rio Preto 15015-110São PauloBrazil Health Sciences Center Epidemiology UnitState University of PiauiTeresina 64001-280PiauíBrazil Department of Gastroenterology CMIP Centro Mineiro de PesquisaJuiz de Fora 36010-570Minas GeraisBrazil Scientific Affairs Takeda Pharmaceuticals BrazilSão Paulo 04709-011Brazil Clinical Research Takeda Pharma

BACKGRoUND Understanding the treatment landscape of inflammatory bowel diseases(IBD)is essential for improving disease management and patient outcomes.Brazil is the largest Latin American country,and it presents socioeconomic and health care differences across its geographical regions.This country has the highest increase in IBD incidence and prevalence in Latin America,but information about the clinical and treatment characteristics of IBD is scarce.AIM To describe the sociodemographic,clinical,and treatment characteristics of IBD outpatients in Brazil overall and in the Southeast,South and Northeast/Midwest regions.METHoDS Multicenter,cross-sectional study with a 3-year retrospective chart review component.Patients with moderate-to-severe Crohn’s disease(CD)or ulcerative colitis(UC)were consecutively enrolled between october 2016 and February 2017.Active CD at enrollment was defined as a Harvey Bradshaw Index≥8 or a CD Activity Index≥220 or a calprotectin level>200μg/g or an active result based on colonoscopy suggestive of inadequate control during the previous year;active UC was defined as a partial Mayo score≥5.Descriptive statistics were used to analyze all variables.RESULTS In a total of 407 included patients,CD was more frequent than UC,both overall(264 CD/143 UC patients)and by region(CD:UC ratios of 2.1 in the Southeast,1.6 in the South and 1.2 in the Northeast/Midwest).The majority of patients were female(54.2%of CD;56.6%of UC),and the mean ages were 45.9±13.8 years(CD)and 42.9±13.0 years(UC).The median disease duration was 10.0(range:0.5-45)years for both IBD types.At enrollment,44.7%[95%confidence interval(CI):38.7-50.7]of CD patients and 25.2%(95%CI:18.1-32.3)of UC patients presented with active disease.More than 95%of IBD patients were receiving treatment at enrollment;CD patients were commonly treated with biologics(71.6%)and immunosuppressors(67.4%),and UC patients were commonly treated with mesalazine[5-Aminosalicylic acid(5-ASA)]derivates(69.9%)and immunosuppressors(44.1%).More than 50%of the CD

关键词： Inflammatory bowel disease Crohn's disease Ulcerative colitis Disease activity Epidemiology Treatment

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