Search results for " ROC curve"

showing 10 items of 31 documents

Novel M. tuberculosis specific IL-2 ELISpot assay discriminates adult patients with active or latent tuberculosis

2018

Background Tuberculosis (TB) still is a major worldwide health problem, with 10.4 million new cases in 2016. Only 5–15% of people infected with M. tuberculosis develop TB disease while others remain latently infected (LTBI) during their lifetime. Thus, the absence of tests able to distinguish between latent infection and active tuberculosis is one of the major limits of currently available diagnostic tools. Methods A total of 215 patients were included in the study as active TB cases (n = 73), LTBI subjects (n = 88) and healthy persons (n = 54). Peripheral blood mononuclear cells (PBMCs) were isolated from each patient and the LIOSpot® TB anti-human IL-2 ELISpot assay was performed to test …

Bacterial DiseasesMale0301 basic medicinelcsh:MedicineAdult; Aged; Case-Control Studies; Diagnosis Differential; Female; Humans; Immunoassay; Interleukin-2; Latent Tuberculosis; Male; Middle Aged; Mycobacterium tuberculosis; ROC Curve; Species SpecificityFluorescence MicroscopyBiochemistry Genetics and Molecular Biology (all); Agricultural and Biological Sciences (all)ZoonosesDiagnosisMedicine and Health SciencesBovine TuberculosisEnzyme-Linked Immunoassayslcsh:ScienceImmunoassayMicroscopyMultidisciplinarybiologyLatent tuberculosismedicine.diagnostic_testELISPOTLight MicroscopyMiddle AgedActinobacteriaInfectious DiseasesTuberculosis Diagnosis and ManagementFemaleResearch ArticleAdultTuberculosis030106 microbiologyResearch and Analysis MethodsQuantiFERONDiagnosis DifferentialMycobacterium tuberculosis03 medical and health sciencesSpecies SpecificityAntigenDiagnostic MedicineLatent TuberculosismedicineTuberculosisHumansImmunoassaysAgedBacteriabusiness.industrylcsh:ROrganismsCase-control studyBiology and Life SciencesMycobacterium tuberculosisTropical Diseasesmedicine.diseasebiology.organism_classificationMycobacterium Ulcerans030104 developmental biologyROC CurveCase-Control StudiesImmunoassayDifferentialImmunologyImmunologic TechniquesInterleukin-2lcsh:QbusinessPLOS ONE
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Automatic Extraction of Blood Vessels, Bifurcations and End Points in the Retinal Vascular Tree

2008

In this paper we present an effective algorithm for automated extraction of the vascular tree in retinal images, including bifurcations, crossovers and end-points detection. Correct identification of these features in the ocular fundus helps the diagnosis of important systematic diseases, such as diabetes and hypertension. The pre-processing consists in artefacts removal based on anisotropic diffusion filter. Then a matched filter is applied to enhance blood vessels. The filter uses a full adaptive kernel because each vessel has a proper orientation and thickness. The kernel of the filter needs to be rotated for all possible directions. As a consequence, a suitable kernel has been designed …

Cross-correlationPixelAnisotropic Diffusion Matched Filter Retinal Vessels ROC curve.Computer scienceAnisotropic diffusionbusiness.industryQuantitative Biology::Tissues and OrgansMatched filterBinary imageComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONRetinalPattern recognitionchemistry.chemical_compoundTree structurechemistryKernel (image processing)Artificial intelligencebusiness
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Frailty and emergency surgery in the elderly: protocol of a prospective, multicenter study in Italy for evaluating perioperative outcome (The FRAILES…

2018

Improvements in living conditions and progress in medical management have resulted in better quality of life and longer life expectancy. Therefore, the number of older people undergoing surgery is increasing. Frailty is often described as a syndrome in aged patients where there is augmented vulnerability due to progressive loss of functional reserves. Studies suggest that frailty predisposes elderly to worsening outcome after surgery. Since emergency surgery is associated with higher mortality rates, it is paramount to have an accurate stratification of surgical risk in such patients. The aim of our study is to characterize the clinicopathological findings, management, and short-term outcom…

Elderly patient; Emergency surgery; Frailty; Geriatric; Risk assessment; Scores; Aged; Aged 80 and over; Clinical Protocols; Emergencies; Female; Frailty; Humans; Italy; Logistic Models; Male; Multivariate Analysis; Outcome Assessment Health Care; Postoperative Complications; Prognosis; Prospective Studies; ROC Curve; Risk Assessment; Frail ElderlyMaleOutcome Assessment030230 surgerylaw.invention0302 clinical medicinePostoperative ComplicationsQuality of lifeClinical ProtocolslawOutcome Assessment Health Care80 and overProspective StudiesProspective cohort studyMultivariate AnalysiAged 80 and overEmergencieFrailtyMortality rateScoreScoresPrognosisIntensive care unitElderly patient; Emergency surgery; Frailty; Geriatric; Risk assessment; Scores; Aged; Aged 80 and over; Clinical Protocols; Emergencies; Female; Frailty; Humans; Italy; Logistic Models; Male; Multivariate Analysis; Outcome Assessment (Health Care); Postoperative Complications; Prognosis; Prospective Studies; ROC Curve; Risk Assessment; Frail ElderlyItaly030220 oncology & carcinogenesiselderly patient emergency surgery frailty geriatric risk assessment scoresEmergency surgeryFemaleRisk assessmentElderly patientHumanmedicine.medical_specialtyElderly patient; Emergency surgery; Frailty; Geriatric; Risk assessment; Scores;Logistic ModelPrognosiFrail ElderlyRisk AssessmentNO03 medical and health sciencesOutcome Assessment (Health Care)medicineHumansClinical ProtocolAgedbusiness.industryPerioperativeElderly patient; Emergency surgery; Frailty; Geriatric; Risk assessment; ScoresSurgeryHealth CareProspective StudieSettore MED/18 - Chirurgia GeneraleLogistic ModelsROC CurveEmergency medicineMultivariate AnalysisLife expectancyObservational studySurgeryPostoperative ComplicationEmergenciesbusinessGeriatric
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Data Mining Technique (Maximum Entropy Model) for Mapping Gully Erosion Susceptibility in the Gorganrood Watershed, Iran

2019

Soil erosion is a serious problem affecting most of the countries. This study was carried out in Gorganrood Watershed (Iran), which extends for 10,197 km2 and is severely affected by gully erosion. A gully headcut inven- tory map consisting of 307 gully headcut points was provided by Google Earth images, field surveys, and national reports. Gully conditioning factors including sig- nificant geo-environmental and morphometric variables were selected as predictors. Maximum entropy (ME) model was exploited to model gully susceptibility, whereas the area under the ROC curve (AUC) and draw- ing receiver operating characteristic (ROC) curves were employed to evaluate the performance of the model.…

HydrologyGully erosion Susceptibility Geographic information systems (GIS) Maximum entropy (ME) model Area under the ROC curve (AUC)WatershedReceiver operating characteristicPrinciple of maximum entropySettore GEO/04 - Geografia Fisica E GeomorfologiaGully erosionArea under the roc curveSettore GEO/05 - Geologia ApplicataGeology
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Assessment of Gully Erosion Susceptibility Using Multivariate Adaptive Regression Splines and Accounting for Terrain Connectivity

2017

In this work, we assessed gully erosion susceptibility in two adjacent cultivated catchments of Sicily (Italy) by employing multivariate adaptive regression splines (MARS) and a set of geo-environmental variables. To explore the influence of hydrological connectivity on gully occurrence we measured the changes of performance occurred when adding one by one nine predictors reflecting terrain connectivity to a base model that included contributing area and slope gradient. Receiver operating characteristic (ROC) curves and the area under the ROC curve (AUC) were used to evaluate models performance. Gully predictive models were trained in both the catchments and submitted to internal (in the ca…

HydrologygeographyMultivariate adaptive regression splinesgeography.geographical_feature_category010504 meteorology & atmospheric sciencesReceiver operating characteristicCalibration (statistics)Drainage basinSoil ScienceTerrainGully erosionDevelopment010502 geochemistry & geophysics01 natural sciencesEnvironmental ChemistryEnvironmental scienceArea under the roc curveDrainage density0105 earth and related environmental sciencesGeneral Environmental ScienceLand Degradation & Development
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Diagnosis of sclerosing cholangitis in children: blinded, comparative study of magnetic resonance versus endoscopic cholangiography.

2013

Summary Background Magnetic resonance cholangiography (MRC) has been validated as comparable to endoscopic retrograde cholangiography (ERC) for the diagnosis of sclerosing cholangitis (SC) in adult patients. In children, MRC is widely used based mainly on non-comparative studies. Patients and methods ERCs and MRCs of seven children (median age 9, range: 7–20 years) with SC and 17 controls (median age 6, range: 2 months–20 years) with other chronic liver diseases were reviewed in a blinded, random and independent way. All patients underwent both examinations within a 6-months slot. All ERCs and 17 MRCs were performed under general anesthesia. One radiologist evaluated both ERCs and MRCs and …

MaleCholangitisSclerosingCholangiographyEndoscopic RetrogradeBile Ducts ExtrahepaticROCYoung adultChildIntrahepaticCholangiopancreatography Endoscopic RetrogradeObserver Variationmedicine.diagnostic_testBile ductGastroenterologyERCMagnetic resonance cholangiographyMagnetic Resonance Imagingsclerosing cholangitiCholangiopancreatographyMRCmedicine.anatomical_structurePredictive value of testsChild PreschoolFemaleRadiologymedicine.medical_specialtyEndoscopic retrograde cholangiographyAdolescentERC; Endoscopic retrograde cholangiography; MRC; Magnetic resonance cholangiography; ROC; Receiver operating curves; SC; Sclerosing cholangitis; Adolescent; Bile Ducts Extrahepatic; Bile Ducts Intrahepatic; Case-Control Studies; Child; Child Preschool; Cholangitis Sclerosing; Female; Humans; Infant; Male; Observer Variation; Predictive Value of Tests; ROC Curve; Retrospective Studies; Sensitivity and Specificity; Young Adult; Cholangiopancreatography Endoscopic Retrograde; Magnetic Resonance Imaging; GastroenterologyCholangitis SclerosingSocio-culturaleIntrahepatic bile ductsExtrahepaticSensitivity and SpecificityYoung AdultPredictive Value of TestsmedicineHumansSCPreschoolRetrospective StudiesHepatologyReceiver operating curvesbusiness.industryInfantMagnetic resonance imagingRetrospective cohort studyGold standard (test)Bile Ducts IntrahepaticROC CurveCase-Control StudiesBile DuctsbusinessSclerosing cholangitisClinics and research in hepatology and gastroenterology
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Noninvasive assessment of respiratory muscle strength and activity in Myotonic dystrophy

2017

Objective To evaluate sensitivity/specificity of the maximum relaxation rate (MRR) of inspiratory muscles, amplitude of electromyographic activity of the sternocleidomastoid (SCM), scalene (SCA), parasternal (2ndIS) and rectus abdominis (RA) muscles; lung function and respiratory muscle strength in subjects with Myotonic dystrophy type 1 (DM1) compared with healthy subjects. Design and methods Quasi-experimental observational study with control group. MRR of inspiratory muscles, lung function and amplitude of the electromyographic activity of SCM, SCA, 2ndIS and RA muscles during maximum inspiratory pressure (PImax), maximum expiratory pressure (PEmax) and sniff nasal inspiratory pressure (…

MaleMuscle PhysiologyTime FactorsMuscle FunctionsPhysiologyMuscle RelaxationRespiratory Systemlcsh:MedicineElectromyographyPulmonary function testing0302 clinical medicineThoracic DiaphragmMedicine and Health SciencesMyotonic DystrophyMedicineRespiratory systemlcsh:ScienceMusculoskeletal SystemAbdominal MusclesMultidisciplinaryAnthropometrymedicine.diagnostic_testMusclesMuscle AnalysisRespiratory MusclesRespiratory Function TestsBioassays and Physiological AnalysisMuscle relaxationInhalationGenetic DiseasesExhalationParasternal lineCardiologyFemaleAnatomyMuscle ElectrophysiologyResearch ArticleAdult; Anthropometry; Electromyography; Exhalation; Female; Humans; Inhalation; Male; Muscle Relaxation; Muscle Strength; Myotonic Dystrophy; Pressure; ROC Curve; Respiratory Function Tests; Respiratory Muscles; Sample Size; Time FactorsAdultmedicine.medical_specialtyRespiratory physiologyResearch and Analysis Methods03 medical and health sciencesInternal medicineRespiratory musclesPressureRespiratory muscleHumansRespiratory PhysiologyMuscle StrengthClinical GeneticsElectromyographic activityElectromyographybusiness.industryElectrophysiological Techniqueslcsh:RBiology and Life SciencesExhalationSkeletal MusclesROC Curve030228 respiratory systemSample Sizelcsh:Qbusiness030217 neurology & neurosurgeryPLOS ONE
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ROC-king onwards: intraepithelial lymphocyte counts, distribution & role in coeliac disease mucosal interpretation

2017

ObjectivesCounting intraepithelial lymphocytes (IEL) is central to the histological diagnosis of coeliac disease (CD), but no definitive ‘normal’ IEL range has ever been published. In this multicentre study, receiver operating characteristic (ROC) curve analysis was used to determine the optimal cut-off between normal and CD (Marsh III lesion) duodenal mucosa, based on IEL counts on >400 mucosal biopsy specimens.DesignThe study was designed at the International Meeting on Digestive Pathology, Bucharest 2015. Investigators from 19 centres, eight countries of three continents, recruited 198 patients with Marsh III histology and 203 controls and used one agreed protocol to count IEL/100 ent…

MalePathologySettore MED/09 - Medicina Interna2312ROC-curve analysiBiopsyCoeliac diseaseSerology0302 clinical medicineintraepithelial lymphocytesDiagnosis80 and overROC-curve analysis; coeliac disease; intraepithelial lymphocytes1506LymphocytesIntestinal MucosaChild1507medicine.diagnostic_testArea under the curveGastroenterologyhemic and immune systemsMiddle AgedPrognosis030220 oncology & carcinogenesis030211 gastroenterology & hepatologyFemalemedicine.symptomtissuesAdultmedicine.medical_specialtyAdolescentchemical and pharmacologic phenomenaBiologydigestive systemLesion03 medical and health sciencesBiopsymedicineHumansLymphocyte CountPreschoolAgedReceiver operating characteristicInfantHistologymedicine.diseaseNewbornROC-curve analysis; coeliac disease; intraepithelial lymphocytes; Adolescent; Adult; Aged; Aged 80 and over; Biopsy; Case-Control Studies; Celiac Disease; Child; Child Preschool; Diagnosis Differential; Female; Humans; Infant; Infant Newborn; Intestinal Mucosa; Lymphocyte Count; Lymphocytes; Male; Middle Aged; Prognosis; ROC Curve; GastroenterologyCeliac DiseaseROC CurveCase-Control StudiesDifferentialIntraepithelial lymphocyteROC-curve analysiscoeliac disease
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The MITOS system predicts long-term survival in amyotrophic lateral sclerosis

2015

ObjectiveThe choice of adequate proxy for long-term survival, the ultimate outcome in randomised clinical trials (RCT) assessing disease-modifying treatments for amyotrophic lateral sclerosis (ALS), is a key issue. The intrinsic limitations of the ALS Functional Rating Scale-Revised (ALSFRS-R), including non-linearity, multidimensionality and floor-effect, have emerged and its usefulness argued. The ALS Milano-Torino staging (ALS-MITOS) system was proposed as a novel tool to measure the progression of ALS and overcome these limitations. This study was performed to validate the ALS-MITOS as a 6-month proxy of survival in 200 ALS patients followed up to 18 months.MethodsAnalyses were performe…

MalePredictive Value of TestWalkingLogistic regressionALS; MOTOR NEURON DISEASE; NEUROMUSCULAR; RANDOMISED TRIALS; Adult; Aged; Amyotrophic Lateral Sclerosis; Communication; Deglutition; Disability Evaluation; Disease Progression; Double-Blind Method; Female; Humans; Male; Middle Aged; Noninvasive Ventilation; Predictive Value of Tests; ROC Curve; Respiration; Self Care; Survival Analysis; Walking; Neurology (clinical); Psychiatry and Mental Health; Surgery; Arts and Humanities (miscellaneous); Medicine (all)law.inventionALS long-term survival ALSFRS-RDisability EvaluationRandomized controlled triallawNEUROMUSCULARAmyotrophic lateral sclerosisMOTOR NEURON DISEASEALS; MOTOR NEURON DISEASE; NEUROMUSCULAR; RANDOMISED TRIALS; Neurology (clinical); Psychiatry and Mental Health; Surgery; Arts and Humanities (miscellaneous)CommunicationRespirationMedicine (all)Area under the curveMiddle Agedals motor neuron disease neuromuscular randomised trialsPsychiatry and Mental HealthPredictive value of testsDisease ProgressionSettore MED/26 - NeurologiaFemaleSurvival AnalysiHumanAdultmedicine.medical_specialtyNOSwallowingDouble-Blind MethodArts and Humanities (miscellaneous)Predictive Value of TestsInternal medicinemedicineRANDOMISED TRIALSHumansSurvival analysisAgedNoninvasive VentilationReceiver operating characteristicbusiness.industryAmyotrophic Lateral Sclerosisals; motor neuron disease; neuromuscular; randomised trials; adult; aged; amyotrophic lateral sclerosis; communication; deglutition; disability evaluation; disease progression; double-blind method; female; humans; male; middle aged; noninvasive ventilation; predictive value of tests; roc curve; respiration; self care; survival analysis; walking; neurology clinical; psychiatry and mental health; surgery; arts and humanities ; medicinemedicine.diseaseSurvival AnalysisSurgeryDeglutitionSelf CareALS; MOTOR NEURON DISEASE; NEUROMUSCULAR; RANDOMISED TRIALS; Adult; Aged; Amyotrophic Lateral Sclerosis; Communication; Deglutition; Disability Evaluation; Disease Progression; Double-Blind Method; Female; Humans; Male; Middle Aged; Noninvasive Ventilation; Predictive Value of Tests; ROC Curve; Respiration; Self Care; Survival Analysis; Walking; Surgery; Arts and Humanities (miscellaneous); Neurology (clinical); Psychiatry and Mental HealthROC CurveSurgeryNeurology (clinical)ALSbusinessAmyotrophic Lateral Sclerosi
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Cognitive impairment: classification by 1H magnetic resonance spectroscopy.

2004

1H magnetic resonance spectroscopy (MRS) allows accurate and non-invasive in vivo metabolic study, and is a useful tool for the diagnosis of different forms of dementias. Cognitive impairment pathologies have been almost exclusively studied with MRS by comparison with healthy without a global comparison amongst Alzheimer disease (AD), vascular dementia, mild cognitive impairment (MCI) and major depression patients with cognitive impairment. Whereas decrease of N-acetylaspartate (NAA) and increase myo-Inositol (mI) at different brain locations by 1H MRS are common features of AD, Choline (Cho) alterations have been inconclusive. In our study, 64 patients with cognitive impairment were evalua…

Malemedicine.medical_specialtyMagnetic Resonance Spectroscopychemistry.chemical_compoundPosterior cingulate gyrusInternal medicinemental disordersmedicineCholineDementiaHumansProspective StudiesVascular dementiaCognitive impairmentDepression (differential diagnoses)Agedbusiness.industryMental DisordersMiddle Agedmedicine.diseasenervous systemNeurologychemistryCardiologyFemaleNeurology (clinical)Alzheimer's diseaseProtonsbusinessCognition DisordersArea under the roc curveNeuroscienceEuropean journal of neurology
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