Ozgen A, Erol C, Kaya A, Ozmen M N, Akata D, Akhan O
Department of Radiology, Hacettepe University School of Medicine, Sihhiye, 06100, Ankara, Turkey.
Eur J Endocrinol. 1999 Apr;140(4):328-31. doi: 10.1530/eje.0.1400328.
To determine the interobserver and intraobserver variations in sonographic measurement of thyroid volume in children.
Thyroid volumes of 30 healthy children were measured by three separate observers. Additionally each observer measured thyroid volumes of ten separate children three times.
The data were used to assess intraobserver and interobserver variations in measurement of thyroid volume. Interobserver and intraobserver variations in measuring each diameter of the thyroid gland were also determined. The effect of thyroid size on interobserver and intraobserver variations was analyzed.
Intraobserver variation in measurement of thyroid volume was 8.4+/-6.7% (mean+/-s. d.). Interobserver variation was 13.3+/-8.2%. The widest interobserver variation was encountered in determining the craniocaudal diameter of the thyroid gland. No correlation was found between thyroid volume and interobserver variation (r=-0.12, P=0.27), whereas a slight but statistically significant correlation was found between thyroid volume and intraobserver variation (r=-0.26, P=0.012).
Significant interobserver and intraobserver variation occurs in sonographic measurement of thyroid volume in children.
确定儿童甲状腺体积超声测量中的观察者间及观察者内差异。
由三名独立观察者测量30名健康儿童的甲状腺体积。此外，每名观察者对十名不同儿童的甲状腺体积进行三次测量。
数据用于评估甲状腺体积测量中的观察者内及观察者间差异。还确定了甲状腺各直径测量中的观察者间及观察者内差异。分析了甲状腺大小对观察者间及观察者内差异的影响。
甲状腺体积测量的观察者内差异为8.4±6.7%（均值±标准差）。观察者间差异为13.3±8.2%。在确定甲状腺的头尾直径时，观察者间差异最大。甲状腺体积与观察者间差异无相关性（r = -0.12，P = 0.27），而甲状腺体积与观察者内差异存在轻微但具有统计学意义的相关性（r = -0.26，P = 0.012）。
儿童甲状腺体积超声测量中存在显著的观察者间及观察者内差异。
