Variability of Scoliosis Measurement from Spinal Roentgenograms

Beekman, Claire; Hall, V

doi:10.1093/ptj/59.6.764

Cited by 43 publications

(19 citation statements)

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“…Moreover, the deviations obtained are in the same range as those reported for repeated readings and Cobb angle measurements on radiographs [3,6,15].…”

Section: Intra-and Inter-observer Reliabilitysupporting

confidence: 79%

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Radiation-free quantitative assessment of scoliosis: a multi center prospective study

et al. 2006

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Accurate quantitative measurements of the spine are essential for deformity diagnosis and assessment of curve progression. There is much concern related to the multiple exposures to ionizing radiation associated with the Cobb method of radiographic measurement, currently the standard procedure for diagnosis and follow-up of the progression of scoliosis. In addition, the Cobb method relies on 2-D analysis of a 3-D deformity. The aim of this prospective study was to investigate the clinical value of Ortelius800 TM that provides a radiation-free method for scoliosis assessment in three planes (coronal, sagittal, apical), with simultaneous automatic calculation of the Cobb angle in both coronal and sagittal views. Analysis of the clinical value of the device for assessing spinal deformities was performed on patients with adolescent idiopathic scoliosis, deformity angles ranging from 10°t o 48°. Correlation between Cobb angles measured manually on standard erect posteroanterior radiographs and those calculated by Ortelius800 TM showed an absolute difference between the measurements to be significantly less than ± 5°for coronal measurements and significantly less than ± 6°for sagittal measurements indicating good correlation between the two methods. The measurements from four independent sites and six independent examiners were not significantly different. We found the novel clinical tool to be reliable for following mild and moderate idiopathic curves in both coronal and sagittal planes, without exposing the patient to ionizing radiation. Considering the need for further validation of this new method, any change in treatment protocol should still be based on radiographic control.

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“…Moreover, the deviations obtained are in the same range as those reported for repeated readings and Cobb angle measurements on radiographs [3,6,15].…”

Section: Intra-and Inter-observer Reliabilitysupporting

confidence: 79%

“…Moreover, intra-and inter-observer errors have been observed in the calculation of the Cobb angle as well [20]. The average intra-observer standard deviation (SD) has been reported as approximately 3.5°and inter-observer SD ranging from 2.8°to 7.2° [3,6,15].…”

Section: Introductionmentioning

confidence: 99%

Radiation-free quantitative assessment of scoliosis: a multi center prospective study

et al. 2006

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“…O erro intraobservador variou entre ± 2 a ±4 graus. Já a ausência dos valores intra-observador foi apontada como uma limitação em estudos com metodologia similar 15,17 .…”

Section: Discussionunclassified

Reprodutibilidade intra e interobservadores no ângulo de cobb em indivíduos escolióticos

Sperandio

Tavares

Santos

2011

J. Hum. Growth Dev.

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o objetivo deste estudo é analisar a variabilidade intra e interobservador do método de Cobb em indivíduos escolióticos. Foram avaliadas trinta e quatro radiografias de sujeitos com escoliose para mensuração do ângulo de Cobb. A avaliação intraobservador foi realizada por um avaliador, enquanto a avaliação interobservador foi realizada por três avaliadores. Foram controlados possíveis erros intrínsecos e extrínsecos de mensuração, mas não houve a pré-seleção das vértebras que caracterizam a escoliose. A concordância intra e interobservador foi avaliada pelo coeficiente de correlação de Pearson (p < 0,05). Não houve diferenças significativas de julgamento na condição intra e interobservadores. A magnitude dos coeficientes de correlação oscilou de bom até excelente nos níveis torácico e tóraco-lombar. Na coluna lombar não houve correlação em ambas as condições.

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“…Radiographic measurements of the kyphosis angle are notoriously unreliable (Beckman and Hall 1979). In addition, lateral radiographs of the spine are not truly sagittal views, because they do not take into account the vertebral rotation.…”

Section: Discussionmentioning

confidence: 99%