Miglior S, Albe E, Guareschi M, Mandelli G, Gomarasca S, Orzalesi N
Department of Ophthalmology, University of Milan Bicocca, Department of Neurosciences and Biomedical Technologies, Via Cadore 48, 20052 Monza, Milan, Italy.
Br J Ophthalmol. 2004 Feb;88(2):174-7. doi: 10.1136/bjo.2003.023416.
To assess reproducibility of central corneal thickness (CCT) measurement by means of ultrasonic pachymetry.
Fifty one volunteers underwent three sessions of CCT measurements, each consisting of three CCT measurements, performed by each of three different observers. Intra- and interobserver reproducibility was calculated by means of intraclass correlation coefficient (ICC). The expected range of variability between two independent evaluations was calculated using scatter plots of each test-retest difference against their mean. The standard deviation of the mean differences in the test-retest scores was used to describe the differences in the score spread.
The ICC ranges of the intra- and interobserver evaluations were 0.95-0.97 and 0.89-0.95 respectively; the expected variability was < or = +/-1% and < or = +/- 2% respectively (95% confidence interval).
The measurement of CCT by means of ultrasonic pachymetry is highly reproducible.
通过超声测厚法评估中央角膜厚度（CCT）测量的可重复性。
51名志愿者接受了三次CCT测量，每次测量包括由三名不同观察者分别进行的三次CCT测量。通过组内相关系数（ICC）计算观察者内和观察者间的可重复性。使用每次重测差异与其平均值的散点图计算两次独立评估之间的预期变异范围。重测分数平均差异的标准差用于描述分数分布的差异。
观察者内和观察者间评估的ICC范围分别为0.95 - 0.97和0.89 - 0.95；预期变异分别≤±1%和≤±2%（95%置信区间）。
通过超声测厚法测量CCT具有高度可重复性。
