Abstract:
:In biomedical measurement, comparisons between two instruments or between a new instrument and the gold standard is commonly needed to evaluate the reliability and validity of the instruments. Such studies are frequently analyzed using statistics that are inappropriate for studying concordance. This article reviews the appropriate statistical techniques and provides a current methodological guide for the evaluation of reliability and validity of instruments used in the measurement of biomedical variables. The techniques are illustrated using real data from a pilot study comparing four instruments for measuring cholesterol.
journal_name
Rev Med Chiljournal_title
Revista medica de Chileauthors
Bangdiwala SI,Muñoz SRsubject
Has Abstractpub_date
1997-04-01 00:00:00pages
466-73issue
4eissn
0034-9887issn
0717-6163journal_volume
125pub_type
杂志文章abstract::This is the conference given by Jorge Mardones, Emeritus Professor of the University of Chile on the occasion of receiving the Juvenal Hernández award. A biographical trace of Professor Mardones scientific career and its motivations, including his relation to outstanding Chilean scientists is included. A remembrance o...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1989-02-01 00:00:00
abstract:BACKGROUND:The differential diagnosis of pancreatic cancer and focal forms of autoimmune pancreatitis is complicated since serological tests, IgG4 and CA 19-9 have a low sensibility and specificity. CT scan and magnetic resonance imaging provide clear differentiation in the majority, but not in all cases. Endosonograph...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872014000400001
更新日期:2014-04-01 00:00:00
abstract::Preventive measures for teenage pregnancy (TP), would decrease infant mortality, early undernutrition and statal social expenditure. The cost of programs for TP would decrease with a sensitive risk indicator. We searched some pysoshocial and familial parameters, useful to built up this indicator. Self esteem (Piers-Ha...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1995-05-01 00:00:00
abstract:BACKGROUND:Human and animal trichinosis has been recorded in Chile since the late XIX century and is irregularly distributed along the country. From high rates of infection in the early 1900, the frequency of this parasitosis in man has progressively decreased. AIM:To describe and discuss the epidemiological situation...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2002-03-01 00:00:00
abstract::The aim of this work is to analyze the distribution of Duffy blood group and the reproductive history of 148 malformed newborns and their mothers compared to 131 control pairs. The mother-child segregation of the system is analyzed using ITO matrixes. A higher frequency of heterozygote mothers for the system was found...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1994-09-01 00:00:00
abstract::Ulcerative colitis (UC) is a chronic inflammatory disease of unknown etiology that affects a variable length of the colon, starting from the rectum. When the disease is confined to the rectum is called ulcerative proctitis (UP). Several studies have unsuccessfully attempted to determine the factors that determine the ...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:/S0034-98872010000100016
更新日期:2010-01-01 00:00:00
abstract::We evaluated the concentration of cefotaxime in the exudate from ischemic leg ulcers in 9 subjects with severe obstructive arterial disease. The administration of the drug was either systemic (1 g in 250 ml of saline given in 30 min) or regional at a vein of the foot while a tourniquet was applied at the level of the ...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
abstract:BACKGROUND:The place of death has changed and coverage of medical attention at death varies according to the development level of countries. AIM:To assess the evolution of coverage of medical attention of the last disease and place of death as indicators of health care quality and development level, in the sixth regio...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872007000800010
更新日期:2007-08-01 00:00:00
abstract::Splenic abscesses are infrequent and usually associated to sepsis and immunodepression. The diagnosis is commonly made in the necropsy. We report two cases of multiple splenic abscesses in type II diabetic patients that were diagnosed by ultrasound. Both patients were successfully managed with surgery (drainage of lef...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1993-05-01 00:00:00
abstract:BACKGROUND:Behçet's disease (BD) is a rare multisystemic inflammatory disease that is potentially disabling and may cause death. AIM:To describe the characteristics of BD patients from two Chilean centers. PATIENTS AND METHOD:Retrospective review of the clinical records of patients with BD attended in two rheumatolog...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872009001000008
更新日期:2009-10-01 00:00:00
abstract::A narrative review of the evidence regarding the role of inflammation in the pathophysiology of coronary heart disease and depression is presented. As a common pathogenic factor, inflammation could explain the frequent association of both diseases. We discuss the benefit of exercise and diet modifications in both cond...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/s0034-98872020000200224
更新日期:2020-02-01 00:00:00
abstract:BACKGROUND:Autologous hematopoietic cell transplantation (THA) in patients with multiple myeloma and amyloidosis is the standard of care to promote disease free survival and quality of life. AIM:To report our experience with THA in patients with multiple myeloma. MATERIAL AND METHODS:Retrospective review of the hemat...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872014001200001
更新日期:2014-12-01 00:00:00
abstract::We report a 34-years-old male, with a history of hepatitis B and human immunodeficiency virus (HIV) infection that was admitted to the hospital with malaise, weight loss, frontal behavior and chest pain. Imaging studies showed two frontal cortical/subcortical nodules. A stereotactic cerebral biopsy showed reactive gli...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872011000200012
更新日期:2011-02-01 00:00:00
abstract::We present a case of a 28 year old woman with paroxysmal left posterior fascicular ventricular tachycardia (LPFVT). Ventricular tachycardia was not inducible after completing of left ventricle 3D reconstruction. Even though catheter ablation was not performed, no LPFVT recurrence has been documented during 60 months f...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872010000800011
更新日期:2010-08-01 00:00:00
abstract:BACKGROUND:An important agent of food intoxication is Staphylococcus aureus, that is able to produce enterotoxins. AIM:To detect Staphylococcus aureus contamination in cafeteria food handlers of a Chilean University. SUBJECTS AND METHODS:Nose, throat, hands and nail samples from 87 food handlers were obtained for mic...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1996-09-01 00:00:00
abstract:BACKGROUND:Type 1 diabetes mellitus (DM1) is a disease of increasing incidence among children. The time elapsed between the beginning of symptoms and the diagnosis of the disease is, in most cases, very extended. AIM:To report the clinical picture at onset and laboratory features of children with DM1. MATERIAL AND ME...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872006001200007
更新日期:2006-12-01 00:00:00
abstract::To adequately plan the post graduate training of physicians, we need to know the needs for specialists in the country and the most prevalent diseases and causes of consultations. In 2004, the National System of Health Services assessed the number of hours and types of specialties available, their regional distribution...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:/S0034-98872008000100013
更新日期:2008-01-01 00:00:00
abstract::Thyroid disfunction in the aged is often misdiagnosed either due to scanty symptoms, masking by other ailments or because function tests can be altered by extrathyroid causes such as chronic diseases, drugs or undernutrition. We surveyed 93 patients from 60 to 104 years old (73 females) living in geriatric homes. Most...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1990-04-01 00:00:00
abstract::This article reports the results of 1080 ultrasonographic examinations of the liver in a clinic of the Ninth Region of Chile, using a SSD 620 Aloka equipment. In 61 examinations (5.6%) a focal liver lesion was found. Of these, 9 (14.7% of lesions) appeared as malignant (6 metastasis and 3 hepatomas) and 52 (85.3% of l...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1994-03-01 00:00:00
abstract::A 51 year old man with acquired immune deficiency syndrome for 2 years developed a chronic leukemia/T cell lymphoma. Anti HTLV-1 antibodies were confirmed by Western Blot. In the last months he developed hypercalcemia and leukocytosis of 130,000. Necropsy confirmed the diagnosis of Leukemia/T cell lymphoma without cut...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1990-06-01 00:00:00
abstract::We report four episodes of mushroom poisoning that occurred between 1986 and 1990 in the province of Malleco. Twenty five of 36 individuals who ingested the mushroom became ill; they had an acute gastroenteritis that was followed in 7 by an acute hepatitis and in one by a massive upper gastrointestinal bleeding. Three...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:1994-07-01 00:00:00
abstract::Intracranial sinus thrombosis (1ST) after closed head injury is an uncommon but potentially serious complication. It has no correlation with the severity of the injury. The symptoms and clinical course are highly variable. The most frequent but least specific symptom is severe headache. Cerebral lesions and neurologic...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872013001200016
更新日期:2013-12-01 00:00:00
abstract::An analysis of the interaction of evolutionary factors such as migration, mutation, selection random drift, and consanguinity upon the genome of Easter islanders is attempted. As many primitive populations, the Easter islanders genome has at least 2/3 of genetic loci in an isogenic state. The HLA system is reduced; ot...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:
更新日期:1989-06-01 00:00:00
abstract:BACKGROUND:The nutritional impact of CONIN nutritional recovery centers must be evaluated, considering the current epidemiological situation in Chile and the new therapeutic focus giving more emphasis to ambulatory treatment. AIM:To analyze the nutritional status of children treated at traditional CONIN centers, the r...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:
更新日期:2003-09-01 00:00:00
abstract::We report a 61 years old male presenting with a right cerebral infarction, along with a type I persistent left proatlantal artery (PA), which is a form of primitive carotid-basilar anastomosis. The patient had an absence of the ipsilateral vertebral artery (VA) and hypoplasia of the contralateral VA, while the basilar...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/S0034-98872015000800018
更新日期:2015-08-01 00:00:00
abstract::Inflammatory bowel disease (IBD) is a prevalent chronic disorder, often diagnosed during childhood. Studies have suggested that the incidence of IBD in this group of patients is increasing. Children and adolescents with IBD frequently have more extensive and severe disease than adults. Transition is an important conce...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/S0034-98872015000600010
更新日期:2015-06-01 00:00:00
abstract::This paper undertakes an analysis of the scientific criteria used in the diagnosis of death and underscores the importance of intellectual rigor in the definition of medical concepts, particularly regarding such a critical issue as the diagnosis of death. Under the cardiorespiratory criterion, death is defined as "the...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:10.4067/s0034-98872004000100015
更新日期:2004-01-01 00:00:00
abstract::The mortality of acute bacterial meningitis (BM) has remained stable in the last decades in spite of the use of new antibiotics, probably due to vascular complications. We report a 68-year-old woman with BM who had a malignant infarction of left middle cerebral artery territory 72 hours after admission to the hospital...
journal_title:Revista medica de Chile
pub_type: 杂志文章
doi:10.4067/s0034-98872004001000009
更新日期:2004-10-01 00:00:00
abstract::An alternative strategy for cancer treatment is the manipulation of the immune system, denominated cancer immunotherapy. The immunotherapeutical use of cells of the immune system, like dendritic cells (DC), is being explored in different clinical protocols. Recently, we finalized a clinical phase I protocol, for the t...
journal_title:Revista medica de Chile
pub_type: 临床试验,杂志文章,评审
doi:
更新日期:2004-09-01 00:00:00
abstract::There is a close link between hypertension and atherosderosis. Hypertension causes atherosclerotic damage of several organs, called target organs and the risk factors for hypertension and atherosderosis are very similar. The risk of mortality associated to hypertension increases with blood pressure values below the cu...
journal_title:Revista medica de Chile
pub_type: 杂志文章,评审
doi:/S0034-98872010000300015
更新日期:2010-03-01 00:00:00