نتایج جستجو برای: sensitivity specificity

تعداد نتایج: 407808  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده مهندسی 1392

رتینوپاتی دیابتی یکی از دلایل شایع نابینایی در جهان محسوب می شود. انجام معاینات دوره ای و تشخیص بموقع بیماری می تواند مانع از بروز نابینایی شود. معاینات دوره ای شامل تصویربرداری از ته چشم و تحلیل تصاویر توسط افراد متخصص برای مشاهده تغییرات سریع در الگوی عروق خونی و بروز ضایعات مختلف می باشد. این روش معاینه بسیار زمانبر، پرهزینه و نیازمند افراد متخصص می باشد. طراحی سیستمی خودکار برای تشخیص رتینو...

  Background :SCORE, OST and ORAI risk assessment tools could reduce the cost burden of BMD tests by selecting the high risk patients to osteoporosis. In this study we compared the ability of these risk assessment measures to assess probability of the osteoporosis among post-menopausal women.   Methods : 211 post-menopausal women aged 45-88 years enrolled into the study. All of the patients und...

اخی, عذرا , برزویی, شیوا , بنافتی, رفعت , ذاکری, حمیدرضا , شهباز نژاد, لیلا , محمدپور تهمتن, رضا, مسلمی زاده, نرگس , کاشی, زهرا ,

Background: Detecting mothers with gestational diabetes mellitus (GDM) is not only important in prevention of prenatal morbidities but also has significant effect on neonatal and maternal long term outcomes. Today, there are screening tests for GDM but they are time-consuming and expensive, therefore it seems necessary to perform testes that are uses expensive but with higher sensitivity and sp...

Fateme Rajati, Mansour Rezaei, Negin Fakhri, Soodeh Shahsavari,

Background: Gestational diabetes mellitus (GDM) is one of the most common metabolic disorders in pregnancy, which is associated with serious complications. In the event of early diagnosis of this disease, some of the maternal and fetal complications can be prevented. The aim of this study was to early predict gestational diabetes mellitus by two statistical models including artificial neural ne...

G R Pishdad P Pishdad, R Jalli R Pishdad S Tavanaa

Objective: Graves’ disease and Hashimoto’s thyroiditis are the most common causes of hyper and hypothyroidism, respectively. Differentiation of these 2 diseases, if the patient is euthyroid, may sometimes be extremely difficult on the basis of clinical and laboratory findings. The purpose of this study was to determine the sensitivity and specificity of gray scale sonography in differentiat...

آرام احمدی, محمد, بهرامپور, عباس,

Background and Objectives: Diabetes is a chronic and common metabolic disease which has no curative treatment. Logistic regression (LR) is a statistical model for the analysis and prediction in multivariate statistical techniques. Discriminant analysis is a method for separating observations in terms of dependent variable levels which can allocate any new observation after making discriminating...

Journal: :archives of clinical infectious diseases 0
zohreh aminzadeh infectious diseases and tropical medicine research center, shahid beheshti university, m.c., tehran, ir iran; infectious diseases and tropical medicine research center shahid beheshti university, m.c., evin, tehran, ir iran. amir roudgari infectious diseases and tropical medicine research center, shahid beheshti university, m.c., tehran, ir iran

background optimal use of the clinical examination aids physicians in identifying patients at risk for meningitis. the low specificity of the meningeal signs may be due to the presence of cervical arthritis and spondylosis. one of the most sensitive maneuvers in the diagnosis of meningitis is jolt accentuation of headache. patients and methods a descriptive research was performed on suspected a...

Background: ASGE predictive model for the detection of choledocholithiasis is a reasonable approach for the management of patients with cholelithiasis. Surgeons do not pursue cholecystectomy without evaluation of the biliary system when laboratory tests and diagnostic imaging evidence show biliary duct involvement. Literature revisions reveal that the prediction of choledocholithiasis based on ...

Akbar Akbari, Massoud Saidijam, Morovat Taherikalani, Nooshin Shabab, Reza Ghanbari, Saiyad Bastaminejad,

Background: Most cancer studies focus on exploring non-invasive biomarkers for cancer detection. In the present study, we sought to investigate the expression level of microRNA-21 (miR-21), as a potential diagnostic marker, in serum and stool samples from 40 patients with colorectal cancer (CRC) and 40 healthy controls. Methods: Quantitative real-time RT-PCR was applied to determine the relativ...

Journal: :iranian journal of nuclear medicine 2002
shahram dabiri oskooie h argani

renal artery stenosis (ras) is the most common cause of secondary hypertension. preliminary data indicate that aspirin renography with hippurate may be more sensitive for detection ras. in this study 20 patients with known or suspected ras underwent aspirin renography (20 mg/kg orally 1 hour before injection of radiotracer) and captopril renography (50 mg orally) with 99mtc-dtpa. renal angiogra...

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