内斜视儿童棱镜交替遮盖试验的观察者间可靠性
Interobserver reliability of the prism and alternate cover test in children with esotropia.
出版信息
Arch Ophthalmol. 2009 Jan;127(1):59-65. doi: 10.1001/archophthalmol.2008.548.
OBJECTIVE
To determine 95% limits of agreement on a measurement and on a difference between 2 measurements for the prism and alternate cover test (PACT) at distance and at near fixation.
METHODS
In a test-retest reliability study, 143 children aged 60 months or younger with esotropia were examined by 2 masked examiners on 1 or 2 occasions yielding 199 test-retest pairs for PACT at distance fixation and 239 test-retest pairs for PACT at near fixation.
RESULTS
For angles greater than 20 prism diopters (PD), the 95% limits of agreement on a measurement and on a difference between 2 measurements were +/-7.3 PD and +/-10.4 PD, respectively, for PACT at distance and +/-8.3 PD and +/-11.7 PD, respectively, for PACT at near. For angles of 10 to 20 PD, the 95% limits of agreement on a measurement and on a difference between 2 measurements were +/-4.1 PD and +/-5.8 PD, respectively, for PACT at distance and +/-3.3 PD and +/-4.7 PD, respectively, for PACT at near.
CONCLUSION
In childhood esotropia, differences of 12 PD or more for angles greater than 20 PD and differences of 6 PD or more for angles between 10 PD and 20 PD are likely to indicate real change. Smaller differences could be real change but could also be due to measurement error.
目的
确定在远距离和近距离注视时，棱镜交替遮盖试验（PACT）测量值及两次测量差值的95%一致性界限。
方法
在一项重测信度研究中，两名掩蔽检查者对143名60个月及以下患有内斜视的儿童进行了1次或2次检查，获得了199对远距离注视时PACT的重测数据对以及239对近距离注视时PACT的重测数据对。
结果
对于大于20棱镜度（PD）的角度，远距离PACT测量值及两次测量差值的95%一致性界限分别为±7.3 PD和±10.4 PD，近距离PACT分别为±8.3 PD和±11.7 PD。对于10至20 PD的角度，远距离PACT测量值及两次测量差值的95%一致性界限分别为±4.1 PD和±5.8 PD，近距离PACT分别为±3.3 PD和±4.7 PD。
结论
在儿童内斜视中，大于20 PD的角度差值达到12 PD或更大，以及10 PD至20 PD之间的角度差值达到6 PD或更大，可能表明存在实际变化。较小的差值可能是实际变化，但也可能是由于测量误差所致。
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