Nova Southeastern University, Department of Physical Therapy, Fort Lauderdale, Florida, USA.
Physiother Theory Pract. 2012 Feb;28(2):161-8. doi: 10.3109/09593985.2011.574203. Epub 2011 Jul 3.
This study investigated the reliability and concurrent validity of active shoulder elevation in the scapular plane (scaption) using a digital inclinometer and goniometer. Two investigators used a goniometer and digital inclinometer to measure scaption on 30 asymptomatic participants in a blinded repeated measures design. Good reliability was present with intraclass correlation coefficients (ICCs) for intrarater reliability of goniometry = 0.87, intrarater digital inclinometry = 0.88, interrater goniometry = 0.92, and interrater digital inclinometry = 0.89. The minimal detectable change (MDC95) for the interrater analysis indicated that a change equal to or greater than 8 degrees for goniometry and 9 degrees for inclinometry is required to be 95% certain that the change is not due to intertrial variability or measurement error. The concurrent validity between goniometry and digital inclinometry was excellent with an ICC value of 0.94 for both raters. The 95% limits of agreement suggest that the difference between these two measurement instruments can be expected to vary by up to ±11 degrees. The results support the interchangeable use of goniometry and digital inclinometer for measuring scaption. Clinicians and researchers should consider the MDC values presented when interpreting change during subsequent measurement sessions.
本研究使用数字倾角计和量角器来研究肩胛平面（外展）主动抬高的可靠性和同时效度。两位研究人员在一项盲法重复测量设计中，使用量角器和数字倾角计对 30 名无症状参与者的外展进行了测量。内一致性系数（ICC）表明，量角法的组内可靠性良好，ICC 为 0.87；数字倾角计的组内可靠性 ICC 为 0.88；量角法的组间可靠性 ICC 为 0.92；数字倾角计的组间可靠性 ICC 为 0.89。对于组间分析，最小可检测变化（MDC95）表明，量角法和倾角法的变化需要等于或大于 8 度和 9 度，才能有 95%的把握确定该变化不是由于试验间变异性或测量误差引起的。量角法和数字倾角计之间的同时效度非常好，两位评估者的 ICC 值均为 0.94。95%一致性界限表明，这两种测量仪器之间的差异预计可相差 11 度。研究结果支持在测量外展时可互换使用量角法和数字倾角计。临床医生和研究人员在随后的测量过程中解释变化时，应考虑到所呈现的 MDC 值。
