![]() ![]() Minimum detectable change at the 95% confidence level ( MDC 95) was computed as 1.96 × standard error of measurement × √2. Good to excellent intra‐rater and inter‐rater reliability was demonstrated for the goniometer with ICC values of ≥ 0.82 and ≥ 0.73 and the iPhone ® app with ICC values of ≥ 0.83 and ≥ 0.79, respectively. The Pearson correlation coefficients were used to establish concurrent validity of the iPhone ® app. ![]() Intraclass correlation coefficient ( ICC) models (3, k) and (2, k) were used to determine the intra‐rater and inter‐rater reliability, respectively. All the measurements were conducted three times and the mean value of three repetitions for each measurement was used for analysis. The second (2 h later) and third (48 h later) sessions were carried out in the same manner as the first session. Two blinded examiners each utilized the universal goniometer and iPhone ® to measure active wrist ROM using a volar/dorsal alignment technique in the following sequences: flexion, extension, radial deviation, and ulnar deviation. Following the recruitment process, active wrist ROM was measured using a universal goniometer and iPhone ® 5 app. In all, 120 wrists of 70 asymptomatic adults (38 men and 32 women aged 18–40 years) were assessed in a physiotherapy clinic located at the School of Rehabilitation Sciences, Iran University of Medical Science and Health Services, Tehran, Iran. ![]() This study, for the first time, aimed to evaluate the reliability and concurrent validity of a new smartphone goniometric app (Goniometer Pro©) for measuring active wrist ROM. Recent smartphones have been equipped with accelerometers and magnetometers, which, through specific software applications (apps) can be used for goniometric functions. The measurement can be carried out through various instruments such as goniometers and inclinometers. Measurement of wrist range of motion ( ROM) is often considered to be an essential component of wrist physical examination. ![]()
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