Ginja M M D, Ferreira A J A, Silvestre M, Gonzalo-Orden J M, Llorens-Pena M P
Department of Veterinary Sciences-CETAV, University of Trás-os-Montes e Alto Douro, Portugal.
Acta Vet Hung. 2006 Sep;54(3):387-92. doi: 10.1556/AVet.54.2006.3.8.
Repeatability and reproducibility of Distraction Index (DI) measurements in the PennHIP method were evaluated in 100 dogs. The PennHIP distraction views sent to the PennHIP Analysis Center (PAC) were duplicated, digitalised, and identified with a code, and an adequate computer software was used for DI measurements. One examiner performed two DI measurement sessions, evaluating individually 200 hip joints. The scoring repeatability and reproducibility were estimated calculating the Intraclass Correlation Coefficient (ICC) between the two DI measurement sessions and between the second DI measurement session and the DI in PAC reports, respectively. The ICC for repeatability was 0.97 [95% confidence interval (CI), 0.96 to 0.98], and the ICC for reproducibility was 0.95 (95% CI, 0.93 to 0.96). The results suggest that the DI measurement method described is repeatable and can reproduce the PAC reports with confidence. Distraction indices measured in different PennHIP studies, using this DI measurement method and performed by trained researchers, can be considered interchangeable.
在100只犬中评估了PennHIP方法中牵张指数（DI）测量的重复性和再现性。发送至PennHIP分析中心（PAC）的PennHIP牵张视图被复制、数字化并编码，使用适当的计算机软件进行DI测量。一名检查者进行了两次DI测量，分别对200个髋关节进行评估。通过计算两次DI测量之间以及第二次DI测量与PAC报告中的DI之间的组内相关系数（ICC）来估计评分的重复性和再现性。重复性的ICC为0.97 [95%置信区间（CI），0.96至0.98]，再现性的ICC为0.95（95% CI，0.93至0.96）。结果表明，所描述的DI测量方法具有可重复性，并且能够可靠地再现PAC报告。使用这种DI测量方法并由经过培训的研究人员在不同的PennHIP研究中测量的牵张指数可被视为具有互换性。
