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Vol. 57. Issue 3.
Pages 225-228 (May - June 2015)
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Vol. 57. Issue 3.
Pages 225-228 (May - June 2015)
Original Report
Reproducibility of qualitative assessments of temporal lobe atrophy in MRI studies
Reproducibilidad de la valoración cualitativa de la atrofia del lóbulo temporal por RM
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S. Sarria-Estrada
Corresponding author
ssarria@idi-cat.org

Corresponding author.
, C. Acevedo, R. Mitjana, L. Frascheri, S. Siurana, C. Auger, A. Rovira
Unidad Ressonància Magnètica (I.D.I.), Servei de Radiología, Hospital Universitari Vall d’Hebron, Barcelona, Spain
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Table 1. Demographic data.
Abstract
Objective

To determine the reproducibility of the Scheltens visual rating scale in establishing atrophy of the medial temporal lobe.

Material and methods

We used coronal T1-weighted inversion recovery sequences on a 1.5Tesla MRI scanner to study 25 patients with clinically diagnosed Alzheimer's disease or mild cognitive decline and 25 subjects without cognitive decline. Five neuroradiologists trained to apply the Scheltens visual rating scale analyzed the images. We used the interclass correlation coefficient to evaluate interrater and intrarater agreement.

Results

Raters scored 20 (80%) of the 25 patients with mild cognitive decline or Alzheimer's disease between 2 and 4; by contrast, they scored 21 (84%) of the 25 subjects without cognitive decline between 0 and 1. The interrater agreement was consistently greater than 0.82, with a 95% confidence interval of (0.7–0.9). The intrarater agreement ranged from 0.82 to 0.87, with a 95% confidence interval of (0.56–0.93).

Conclusion

The Scheltens visual rating scale is reproducible among observers, and this finding supports its use in clinical practice.

Keywords:
Mild cognitive decline
Dementia
Alzheimer's disease
Temporal lobe
Brain atrophy
Resumen
Objetivo

Determinar la reproducibilidad de la escala visual de Scheltens para establecer la atrofia del lóbulo temporal medial.

Material y métodos

Reunimos 25 pacientes con diagnóstico clínico de enfermedad de Alzheimer leve o deterioro cognitivo leve (DCL) y 25 sujetos sin deterioro cognitivo. Todos fueron estudiados con RM 1,5Tesla utilizando secuencias de inversión recuperación ponderadas en T1 en el plano coronal. Cinco neurorradiólogos fueron entrenados para aplicar la escala de Scheltens y analizaron las imágenes. Se utilizó el coeficiente de correlación intraclase para valorar el grado de acuerdo inter e intraobservadores.

Resultados

El 80% de los pacientes con deterioro cognitivo leve o enfermedad de Alzheimer obtuvieron puntuaciones entre 2 a 4, mientras que 21 de los 25 controles sanos (84%) fueron puntuados entre 0–1. La concordancia entre observadores fue consistentemente mayor de 0,82, con un intervalo de confianza del 95% (0,7–0,9). La concordancia intraobservador varió entre 0,82 y 0,87, con un intervalo de confianza del 95% (0,56–0,93).

Conclusión

La clasificación de Scheltens es un método reproducible entre observadores, lo que apoya su uso en la práctica clínica.

Palabras clave:
Deterioro cognitivo leve
Demencia
Enfermedad de Alzheimer
Lóbulo temporal
Atrofia cerebral

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