Navegando por Palavras-chave "Variações dependentes do observador"
Agora exibindo 1 - 4 de 4
Resultados por página
Opções de Ordenação
- ItemSomente MetadadadosConcordância entre radiologistas na quantificação de bronquiectasias pela tomografia computadorizada de alta resolução(Universidade Federal de São Paulo (UNIFESP), 2014-11-26) Brito, Milene Carneiro Barbosa de [UNIFESP]; Meirelles, Gustavo de Souza Portes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)OBJECTIVES: To determinethe agreement on the quantification of HRCT. METHODS: HRCT scans of 43 patients with bronchiectasis were analyzed by two radiologists. Findings were graded with a score, and kappa values and overall agreement were calculated. RESULTS: Measurement and appearance of bronchiectasis showed moderate interobserver (k = 0.45 and k = 0.43, respectively) and intraobserver agreement (k = 0.54 and k = 0.47, respectively). Agreement on the presence of mucous plugging was fair(central distribution: overall interobserver agreement of 68.3%, k = 0.39 for intraobserver agreement; peripheral distribution: k = 0.34 and k = 0.35 for inter- and intraobserver agreement, respectively) and forperibronchial thickening (k = 0.21 and k = 0.30 for interand intraobserver agreement, respectively). Agreement on the detection of opacities, ground-glass areas, and cysts/bullae was fair (k = 0.39, overall agreement of 64.3%, and k = 0.47 for interobserver agreement, and overall agreement of 71.9%, k = 0.24, and k = 0.44for intraobserver agreement, respectively). After qualitative analysis of the findings of bronchiectasis on HRCT, the total score for each patient was calculated, showing excellent correlation between observers (intraclass correlation coefficient of 0.85 for interobserver agreement and of 0.81 for intraobserver agreement). CONCLUSION: HRCT findings of bronchiectasis showed fair agreement between observers. After final analysis of the findings using the proposed score, we observed an excellent inter- and intra-observer correlation.
- ItemSomente MetadadadosEstudo da fórmula metatarsal em pacientes com metatarsalgia primária(Universidade Federal de São Paulo (UNIFESP), 2014-03-26) Arie, Eduardo Kenzo [UNIFESP]; Yi, Liu Chiao [UNIFESP]; http://lattes.cnpq.br/6106154677645509; http://lattes.cnpq.br/4983707270335833; Universidade Federal de São Paulo (UNIFESP)Purpose: To verify the prevalence of types of metatarsal formula (FM) in patients with primary metatarsalgia, through x-rays. Assess the association between shortening of the first metatarsal and metatarsalgia in comparison to a control group (CG). Analyze the intra and interobserver reproducibility by methods of transverse lines (MLT) of Morton and arcs (MA) of Hardy & Clapham. Methods: a cross-sectional observational study was conducted in 112 radiographs of the feet, being 56 of GM and 56 of GC evaluated in the period between december 2012 and june 2013. The measurements were made by three third-year residents in orthopaedics, with previous training methods, using a template to decrease the chance of error and disagreement. Results: there was no agreement on any of the two methods by Bland-Altman graphs, but through the intraclass correlation coefficient was verified a greater intra and interobserver reproducibility by MLT (0,78 and 0,85) in relation to the MA (0,73 and 0,60). When comparing both groups, it was observed statistical difference (p ≤ 0,05) with a shortening of the first metatarsal (3,39mm) higher in GC in relation to GM (2,14mm). In patients with primary metatarsalgia, FM type index minus was more prevalent by MLT (62,5%) and the type zero plus by MA (71,4%). Conclusions: In this study, it was observed that the prevalence of FM depends on the method of measurement. When comparing both groups, there was association of the shortening of the first metatarsal with the GC. There were no intra and interobserver agreement in any of the proposed methods.
- ItemAcesso aberto (Open Access)Observer agreement in the diagnosis of interstitial lung diseases based on HRCT scans(Sociedade Brasileira de Pneumologia e Tisiologia, 2010-02-01) Antunes, Viviane Baptista [UNIFESP]; Meirelles, Gustavo de Souza Portes [UNIFESP]; Jasinowodolinski, Dany [UNIFESP]; Pereira, Carlos Alberto de Castro [UNIFESP]; Verrastro, Carlos Gustavo Yuji [UNIFESP]; Torlai, Fabíola Goda [UNIFESP]; D'Ippolito, Giuseppe [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To determine the interobserver and intraobserver agreement in the diagnosis of interstitial lung diseases (ILDs) based on HRCT scans and the impact of observer expertise, clinical data and confidence level on such agreement. METHODS: Two thoracic radiologists and two general radiologists independently reviewed the HRCT images of 58 patients with ILDs on two distinct occasions: prior to and after the clinical anamnesis. The radiologists selected up to three diagnostic hypotheses for each patient and defined the confidence level for these hypotheses. One of the thoracic and one of the general radiologists re-evaluated the same images up to three months after the first readings. In the coefficient analyses, the kappa statistic was used. RESULTS: The thoracic and general radiologists, respectively, agreed on at least one diagnosis for each patient in 91.4% and 82.8% of the patients. The thoracic radiologists agreed on the most likely diagnosis in 48.3% (κ = 0.42) and 62.1% (κ = 0.58) of the cases, respectively, prior to and after the clinical anamnesis; likewise, the general radiologists agreed on the most likely diagnosis in 37.9% (κ = 0.32) and 36.2% (κ = 0.30) of the cases. For the thoracic radiologist, the intraobserver agreement on the most likely diagnosis was 0.73 and 0.63 prior to and after the clinical anamnesis, respectively. That for the general radiologist was 0.38 and 0.42.The thoracic radiologists presented almost perfect agreement for the diagnostic hypotheses defined with the high confidence level. CONCLUSIONS: Interobserver and intraobserver agreement in the diagnosis of ILDs based on HRCT scans ranged from fair to almost perfect and was influenced by radiologist expertise, clinical history and confidence level.
- ItemAcesso aberto (Open Access)Reproducibility of three classifications of proximal humeral fractures(Instituto Israelita de Ensino e Pesquisa Albert Einstein, 2012-12-01) Carrerra, Eduardo da Frota; Wajnsztejn, Andre [UNIFESP]; Lenza, Mario [UNIFESP]; Archetti Netto, Nicola [UNIFESP]; Hospital Israelita Albert Einstein; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To propose a new system for classifying proximal humeral neck fractures, and to evaluate intra- and interobserver agreement using the Neer system that is the most commonly used in the area and the Arbeit Gemeinschaft für Osteosynthesefragen system created by an European group, and a new classification system proposed by the authors of this study. METHODS: A total of 56 patients with proximal humeral fractures were selected, and submitted to digitized simple radiography in antero-posterior shoulder and scapular profile. Radiographs were analyzed by three observers at time one, and then three and six weeks later. The kappa coefficient modified by Fleiss was used for the analysis. RESULTS: The mean intra-observer Kappa agreement index (k=0.687) of the new classification, was higher than both the Neer classification (k=0.362) and the Arbeit Gemeinschaft für Osteosynthesefragen (k=0.46). The mean interobserver Kappa agreement index (0.446) of the new classification, also had better results than both the Neer classification (k=0.063) and the Arbeit Gemeinschaft für Osteosynthesefragen (k=0.028). CONCLUSION: the new classification considering bone compression had higher results for intra- and interobserver compared to the Neer system, and the Arbeit Gemeinschaft für Osteosynthesefragen system.