Department of Physical Therapy, Nova Southeastern University, Ft. Lauderdale, Florida, USA.
Physiother Theory Pract. 2011 Feb;27(2):176-84. doi: 10.3109/09593985.2010.481011. Epub 2010 Aug 8.
The present study investigated the intrarater reliability, interrater reliability and minimal detectable change at the 90% confidence interval (MDC₉₀) of active shoulder range of motion measurements using digital inclinometry. Two investigators each measured two repetitions of active flexion, abduction, external rotation (ER), and internal rotation (IR) on the nondominant shoulder of 30 asymptomatic participants in a blinded repeated measures design. Results indicated good intrarater reliability with Intraclass Correlation Coefficients (ICCs) (3, k) of Flexion=0.83, Abduction=0.91, ER=0.94 and IR=0.87. Interrater ICC values (2, k) were moderate to good with Flexion=0.58, Abduction=0.95, ER=0.88 and IR=0.93. The MDC₉₀ for the interrater analysis indicated that a change of equal to or greater than 8° (Flexion), 4° (Abduction), 8° (IR), and 9° (ER) would be required to be 90% certain that the change is not due to intertrial variability or measurement error. Digital inclinometry appears to be a reliable instrument for quantifying normal shoulder mobility when strict measurement protocols are adhered to. Clinicians and researchers should consider the MDC values presented when interpreting change values during subsequent measurement sessions.
本研究使用数字测斜仪调查了主动肩部活动范围测量的组内可靠性、组间可靠性和 90%置信区间的最小可检测变化（MDC₉₀）。两名研究人员在盲法重复测量设计中，分别测量了 30 名无症状参与者的非优势肩部的主动屈曲、外展、外旋（ER）和内旋（IR）各两次。结果表明，内组间可靠性良好，内组间相关系数（ICC）（3，k）为屈曲=0.83、外展=0.91、ER=0.94 和 IR=0.87。组间 ICC 值（2，k）为中度至良好，屈曲=0.58、外展=0.95、ER=0.88 和 IR=0.93。组间分析的 MDC₉₀ 表明，需要改变等于或大于 8°（屈曲）、4°（外展）、8°（IR）和 9°（ER），才能有 90%的把握确定变化不是由于试验间变异性或测量误差引起的。当严格遵守测量协议时，数字测斜仪似乎是一种可靠的仪器，可用于量化正常肩部活动度。临床医生和研究人员在随后的测量过程中解释变化值时，应考虑所呈现的 MDC 值。
