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Comparative Study
. 2010 Jul-Aug;76(4):491-8.
doi: 10.1590/S1808-86942010000400014.

A new score for tomographic opacification of paranasal sinuses in children

[Article in English, Portuguese]
Severino Aires de Araújo Neto  1 , Emílio Carlos Elias Baracat, Leonardo Franco Felipe
Affiliations
Comparative Study

A new score for tomographic opacification of paranasal sinuses in children

[Article in English, Portuguese]
Severino Aires de Araújo Neto et al. Braz J Otorhinolaryngol. 2010 Jul-Aug.

Abstract

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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Figures

Chart 1
Chart 1
Distribution of the sample per category for each score (%). - LMS: Lund-Mackay system; ODR: opacification/development ratio
Chart 2
Chart 2
Linear regression between scales of two scores
Chart 3
Chart 3
Receiver Operator Characteristic curve for the opacification/ development ratio. Lund-Mackay system (LMS) as the reference test (positive = 4). - ODR: opacification/development ratio
See this image and copyright information in PMC

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