Interobserver variability of sonography for prediction of placenta accreta.
J Ultrasound Med
; 33(12): 2153-8, 2014 Dec.
Article
em En
| MEDLINE
| ID: mdl-25425372
ABSTRACT
OBJECTIVES:
The sensitivity of sonography to predict accreta has been reported as higher than 90%. However, most studies are from single expert investigators. Our objective was to analyze interobserver variability of sonography for prediction of placenta accreta.METHODS:
Patients with previa with and without accreta were ascertained, and images with placental views were collected, deidentified, and placed in random sequence. Three radiologists and 3 maternal-fetal medicine specialists interpreted each study for the presence of accreta and specific findings reported to be associated with its diagnosis. Investigator-specific sensitivity, specificity, and accuracy were calculated. κ statistics were used to assess variability between individuals and types of investigators.RESULTS:
A total of 229 sonographic studies from 55 patients with accreta and 56 control patients were examined. Accuracy ranged from 55.9% to 76.4%. Of imaging studies yielding diagnoses, sensitivity ranged from 53.4% to 74.4%, and specificity ranged from 70.8% to 94.8%. Overall interobserver agreement was moderate (mean κ ± SD = 0.47 ± 0.12). κ values between pairs of investigators ranged from 0.32 (fair agreement) to 0.73 (substantial agreement). Average individual agreement ranged from fair (κ = 0.35) to moderate (κ = 0.53).CONCLUSIONS:
Blinded from clinical data, sonography has significant interobserver variability for the diagnosis of placenta accreta.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Interpretação de Imagem Assistida por Computador
/
Ultrassonografia Pré-Natal
Tipo de estudo:
Clinical_trials
/
Diagnostic_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Pregnancy
Idioma:
En
Revista:
J Ultrasound Med
Ano de publicação:
2014
Tipo de documento:
Article