The results of a study of a screening test for urinary tract infection (UTI) in infants under 18 months is reported. Two hundred and forty three urine specimens were tested in the laboratory using AMES Multistix 8SG reagent strips read by photometer. The strips included three potential markers for urinary tract infection: leucocyte esterase, nitrite, and protein. The predictive value of a posit...

  Abstract   Background: Regarding the diagnostic errors of the classic criteria including serum ascites   albumin gradient (SAAG), total protein concentration and the adapted Light et al’s criteria   in distinguishing transudate versus exudates, we evaluated the ascitic fluid to serum   bilirubin ratio as a new criteria in this regard. We also evaluated whether the combination of   bilirubin r...

PURPOSE Most node-negative breast cancer patients are older and postmenopausal and are increasingly being offered adjuvant chemotherapy despite their low overall risk of distant relapse. A molecular diagnostic test with high negative predictive value (NPV) for distant metastasis in this subgroup would spare many older breast cancer patients adjuvant treatment. EXPERIMENTAL DESIGN We determine...

We argued recently that the positive predictive value (PPV) and the negative predictive value (NPV) are valuable metrics to include during null hypothesis significance testing: They inform the researcher about the probability of statistically significant and non-significant test outcomes actually being true. Although commonly misunderstood, a reported p value estimates only the probability of o...

OBJECTIVE This study tried to assess sensitivity, specificity, positive and negative predictive value of procalcitonin for diagnosis of neonatal bacterial infections. METHODS This prospective cross sectional study was carried out during an 18-month period in NICU and neonatal wards of Besat Hospital in Hamedan province, Iran. 39 symptomatic infants with clinical and laboratory findings in fav...

BACKGROUND To determine the cut-off values of the preoperative risk of malignancy index (RMI) used in differentiating benign or malignant adnexal masses and to determine their significance in differential diagnosis by comparison of different systems. MATERIALS AND METHODS 191 operated women were assessed retrospectively. RMI of 1, 2, 3 and 4; cut-off values for an effective benign or malignan...

introduction: good functional capacity has a high negative predictive value (npv) in patients with known or suspected coronary artery disease (cad) similar to a normal gated myocardial perfusion imaging (gmpi). aim of this study was to evaluate npv of functional capacity during treadmill exercise in patients with normal gmpi in pakistani population. methods: this was a prospective study which ...

• 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...