Boone D C, Azen S P, Lin C M, Spence C, Baron C, Lee L
Phys Ther. 1978 Nov;58(11):1355-60. doi: 10.1093/ptj/58.11.1355.
This study determined the intratester and intertester variability and reliability of goniometric measurements taken by four physical therapists on upper and lower extremity motions of normal male subjects. The same subjects were measured once weekly for four weeks by testers with varied experience in goniometry. Data were analyzed by analyses of variance with repeated measures. Intratester variation for all measurements was less than intertester variation. Further, intertester variation was less for the three upper extremity motions than for those of the lower extremity. These findings indicate the necessity for using the same tester when effects of treatment are evaluated. When the same tester measures the same movement, increases in joint motion of at least three to four degrees determine improvement for either the upper or lower extremity. When more than one tester, however, measures the same movement, increases in joint motion should exceed five degrees for the upper extremity and six degrees for the lower extremity to determine improvement.
本研究确定了四名物理治疗师对正常男性受试者上下肢运动进行角度测量时的测试者内和测试者间的变异性及可靠性。由在角度测量方面经验各异的测试者，对相同受试者每周测量一次，持续四周。采用重复测量方差分析对数据进行分析。所有测量的测试者内变异小于测试者间变异。此外，上肢三个动作的测试者间变异小于下肢动作的测试者间变异。这些发现表明，在评估治疗效果时使用同一测试者的必要性。当同一测试者测量相同动作时，上肢或下肢关节活动度至少增加三到四度才能确定有改善。然而，当有不止一名测试者测量相同动作时，上肢关节活动度增加应超过五度，下肢超过六度才能确定有改善。
