um novo escore para opacificação tomográfica dos seios paranasais em crianças a new score for tomographic opacificacation of paranasal sinuses in children
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2010
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Abstract
Vários escores foram criados para medir alterações dos seios paranasais pela tomografia computadorizada. Atualmente o sistema de Lund e Makcay é o mais aceito. Contudo, em crianças seu resultado pode sofrer interferência do processo de desenvolvimento. OBJETIVO: Medir precisão e acurácia de um novo escore tomográfico, denominado "razão opacificação-desenvolvimento", cujo resultado traduz a percentagem de opacificação da área sinusal. MATERIAL E MÉTODOS: Estudo prospectivo transversal em pacientes de até 18 anos, submetidos à tomografia computadorizada de seios paranasais para avaliação de rinossinusite. Dois radiologistas avaliaram independentemente cada exame, utilizando o sistema de Lund e o escore aqui proposto. RESULTADO: A razão opacificação-desenvolvimento apresentou concordância intra e interobservador, equivalentes àqueles atingidos pelo sistema de Lund (Kappa > 0,60). Utilizando o sistema de Lund como padrão-ouro, o ponto de corte da razão opacificação-desenvolvimento com melhor acurácia foi o valor de 15, com sensibilidade e especificidade próximas de 90%. Houve forte correlação linear entre as escalas dos dois métodos (r > 0,90). CONCLUSÃO: A razão opacificação-desenvolvimento é um método preciso, com boa correlação com o sistema de Lund. Um ponto de corte de 15 pode ser utilizado para definir teste positivo.
Many score methods have been created to measure paranasal sinus abnormalities seen under CT scan. Currently, the Lund-Mackay staging system is widely accepted. However, its results may be affected by the development in children. AIM: To assess the precision and accuracy of a new tomography score, called "opacification-development ratio". It translates the percentage of sinus area that is opaque. MATERIALS AND METHODS: A cross-sectional study was prospectively conducted in patients ranging from 0-18 years of age who underwent CT scan assessment of rhinosinusitis. Two independent radiologists examined each scan twice, using both the Lund system and the ratio herein proposed. RESULTS: The opacification-development ratio reached substantial intra and inter-examiner agreement, similar to the Lund system (Kappa > 0.60). Considering the Lund system as the gold standard, the most accurate cut-off point was approximately 15 (sensitivity and specificity approach 90%). There was a strong linear correlation between the two methods (r > 90). CONCLUSIONS: opacification-development ratio is precise and correlates with the Lund system. A cut-off point set at 15 could be used to call a test positive.
Many score methods have been created to measure paranasal sinus abnormalities seen under CT scan. Currently, the Lund-Mackay staging system is widely accepted. However, its results may be affected by the development in children. AIM: To assess the precision and accuracy of a new tomography score, called "opacification-development ratio". It translates the percentage of sinus area that is opaque. MATERIALS AND METHODS: A cross-sectional study was prospectively conducted in patients ranging from 0-18 years of age who underwent CT scan assessment of rhinosinusitis. Two independent radiologists examined each scan twice, using both the Lund system and the ratio herein proposed. RESULTS: The opacification-development ratio reached substantial intra and inter-examiner agreement, similar to the Lund system (Kappa > 0.60). Considering the Lund system as the gold standard, the most accurate cut-off point was approximately 15 (sensitivity and specificity approach 90%). There was a strong linear correlation between the two methods (r > 90). CONCLUSIONS: opacification-development ratio is precise and correlates with the Lund system. A cut-off point set at 15 could be used to call a test positive.
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neto2010brazilianum
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| Authors | ;Severino Aires de Araújo Neto;Emílio Carlos Elias Baracat;Leonardo Franco Felipe |
| Journal | cardiovascular diabetology |
| Year | 2010 |
| DOI |
10.1590/S1808-86942010000400014
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