Applicability of a Wearable Sensor Unit Pheezee and Assessment of Its Psychometric Properties in Measuring the Ranges of Wrist and Elbow

A reliable and valid range of motion (ROM) assessment is one of the essential components of the motor examination. The Pheezee device measures the ROM and muscle activity during active joint movements. The study aimed to assess the intra and interrater reliabilities and concurrent validity of the Pheezee device in comparison with an electronic goniometer for measuring ranges of wrist and elbow flexion and extension. Forty-two healthy adults with an average age of 32.81 years participated in the study. The ROM was measured by using the Pheezee device and an electronic goniometer. The measurements were compared between the raters and devices to determine the intra, and interrater reliabilities and concurrent validity. The intrarater and interrater reliabilities of both the Pheezee device and electronic goniometer were excellent for elbow and wrist flexion and extension movements, with values ranging from 0.82 to 0.99 (
${p} < 0.001$
). The concurrent validity of all four movements measured using the Pheezee device in comparison with those using the electronic goniometer was also excellent, with values ranging between 0.80 and 0.99 (
${p} < 0.001$
). The ranges of wrist and elbow flexion and extension measured using the Pheezee device have excellent intra and interrater reliabilities and concurrent validity.