Sargent M A, Wilson B P
Royal Manchester Children's Hospital, Pendlebury.
Clin Radiol. 1992 Nov;46(5):344-7. doi: 10.1016/s0009-9260(05)80382-4.
The intra- and interobserver variability of the measurement of renal length in an unselected series of children attending for renal tract ultrasound were estimated using a standard technique and test-retest protocol. The standard errors of measurement were calculated and the limits of agreement derived. The results indicate that for normal kidneys there is a 95% probability that a second measurement by one observer will be within 4.6 mm of his first reading. Similarly, a single measurement will be within 7.8 mm of a reading by a second examiner. For abnormal kidneys in this series the intraobserver variability was similar to normal kidneys but interobserver variability was greater. Observer error in the measurement of renal length is equivalent to between 2 and 3 years normal growth for children older than 1 year.
采用标准技术和重测方案，对一组未经挑选前来接受肾超声检查的儿童测量肾长度的观察者内及观察者间变异性进行了评估。计算测量的标准误差并得出一致性界限。结果表明，对于正常肾脏，一名观察者进行的第二次测量有95%的概率在其首次读数的4.6毫米范围内。同样，单次测量将在第二名检查者读数的7.8毫米范围内。在该系列中，异常肾脏的观察者内变异性与正常肾脏相似，但观察者间变异性更大。对于1岁以上儿童，测量肾长度时的观察者误差相当于2至3年的正常生长。
