purpose: uncorrected visual acuity is the only variable measured in vision screening programs in many countries worldwide. the aim of this study was to calculate the sensitivity, specificity, and predictive value of the uncorrected visual acuity in the screening programs for the diagnosis of refractive errors. methods: in this cross-sectional study, of 4,157 students in the first year of primar...

background: to determine the sensitivity, specificity, positive predictive value (ppv), and negative predictive value (npv) of the national vision screening program for 7 yr old children in iran. methods: in this cross-sectional study, eight cities in iran were selected through multistage cluster sampling. selected cities were sari, birjand, ardabil, mashhad, bandar abbas, dezful, yazd, and ara...

background: considering that elisa method presently is the test of choice for diagnosis of fasciolo­sis, the present study was undertaken to evaluate the maximum validity of coated plates at dif­ferent temperatures and different times during one year of evaluation. methods: serum samples of patients infected with fasciolosis (n=10), hydatidosis (n=5), toxocaria­sis (n=5), and negative control s...

hyperbilirubinemia is a common problem in neonates and causes serious complications. thus, serial measurements of bilirubin should be done. this assessment is done through two methods of laboratory measurement in serum sample and transcutaneous bilirubinometer. this descriptive study compared transcutaneous bilirubin assessment and laboratory serum bilirubin. bilirubin level was assessed among ...

emergency physicians, like other specialists, are faced with different patients and various situations each day. they have to use ancillary diagnostic tools like laboratory tests and imaging studies to be able to manage them. in most cases, numerous tests are available. tests with the least error and the most accuracy are more desirable. the power of a test to separate patients from healthy one...

ôbjective: the mood disorder questionnaire (mdq) has been designed as a screening self-report inventory for diagnosing bipolar mood disorders. this study investigated the validity and the optimal cut-off threshold of the persian version of mdq in a group of ïranian depressive patients. methods: ône hundred and twenty patients with probable diagnosis of mood disorders attending psychiatric clini...

abstract background the aim of this study was to evaluate sensitivity and specificity of mediastinal sonography, and compared with ct, in detection of anterior mediastinal neoplasms. materials and methods the sonography with convex probes (5.0 and 7.5 mhz) was done prospectively for 34 patients (from 2 to 25 years old) with mediastinal mass. the results were compared with the results of contras...

introduction: ankle fracture is one of the most common joint fractures. x-ray and physical examination are its main methods of diagnosis. recently, ultrasonography (us) is considered as a simple and non-invasive method of fracture diagnosis. this study evaluated the diagnostic accuracy of us in detection of ankle fracture in comparison to plain radiography. methods: in this diagnostic accuracy ...

background: we aimed to extract the histogram features for text analysis and, to classify the types of bio medical waste (bmw) for garbage disposal and management. methods: the given bmw was preprocessed by using the median filtering technique that efficiently reduced the noise in the image. after that, the histogram features of the filtered image were extracted with the help of proposed modifi...