نتایج جستجو برای: negative predictive value
تعداد نتایج: 1316490 فیلتر نتایج به سال:
Background: The purpose of this study was to evaluate the value of perioperative tests for the diagnosis of infectionin revision shoulder arthroplasty.Methods: A retrospective analysis was performed on 537 shoulder arthroplasties (429 patients) that underwent revisionshoulder arthroplasty at our institution. Periprosthetic tissue cultures were positive in 169/537 surgeries.Results: White-blood ...
background: currently, non-invasive methods for screening atrophic gastritis and gastric cancer are lacking. the purpose of this study was to evaluate the value of serological parameters including serum pepsinogen i (pgi), pepsinogen ii (pgii) and pepsinogen i: ii ratio for the screening atrophic gastritis and gastric cancer. methods : the study population consisted of 132 dyspeptic patients ...
Abstract Background Cerebral neoplasm arises from brain, spinal cord and meningeal cells. Not only malignant cerebral neoplasm also benign tumor could lead to death due to mass effect on vital structures. Access to these tumors is difficult, and MRI and CT scan could be helpful in determining anatomical location of tumors and distinction of malignant from benign. Objective For better and ea...
conclusions although lap had good performance in early diagnosis of gas, a combination of clinical findings, including tonsillar exudates, petechiae with results of rapid antigen test or culture is necessary for clinician judgment. throat culture is the gold standard test for detecting group a streptococcal infection, but rapid test is a good replacement for culture. objectives the aim of this ...
259 consecutive colposcopic examinations were done at colposcopic unit in Shariati Hospital during 1995-97. 58 cases were omitted due to lack of biopsy report. There were 167 cases of concordance and 34 cases of discordance between results of pap test colposcopic directed biopsy in these cases. We evaluated the value of pap test as a screening test versus colposcopic directed biopsy and found s...
Introduction: Spontaneous bacterial peritonitis (SBP) is a prevalent complication in the patients with cirrhosis and ascites, which leads to high intrahospital mortality. Diagnosis is made when ascetic fluid neutrophils is ≥250 cells/mm3. Manual counting of neutrophils is time-consuming, technically difficult, expensive and in many cases individual-dependent. In contrast, automated counting ...
background: diagnosis of anemia is challenging in resource-poor settings due to inadequate laboratory resources. this study assessed the validity of the tallquist haemoglobinometer in assessing anemia among pregnant women in osogbo, southwestern nigeria. methods: this was a cross - sectional study, in which 200 pregnant women of reproductive age were selected using multistage sapling method. a ...
normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: computed tomography (ct) scan without contrast is the modality of choice for diagnosis of stroke. however, routine brain ct scan, with linear processing has some limitations in early diagnosis of ischemic stroke. the aim of this study was to evaluate and compare the sensitivity and specificity of processed ct i...
• Including many patients with elevated D-dimer concentrations due to other causes than VTE may give a false increase in sensitivity and negative predictive value • The prevalence of VTE has an influence on the predictive values – higher prevalence gives lower NPV • A high ratio of proximal to distal DVT will increase both the sensitivity and the negative predictive value • A study focused on P...
PURPOSE To evaluate the diagnostic accuracy of magnetic resonance imaging of the knee in identifying traumatic intraarticular knee lesions. METHOD 300 patients with a clinical diagnosis of traumatic intraarticular knee lesions underwent prearthoscopic magnetic resonance imaging. The sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratio for a positive...
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