Article: Reliability and validity of measuring respiration movement using a wearable strain sensor in healthy subjects

[Purpose] The purpose of this research was to verify the reliability and validity of measuring respiration movement using a wearable strain sensor (WSS) which has been developed newly for clinical objective assessment. [Subjects and Methods] The 21 healthy male students were advised to conduct a breathing movement using measuring tape (MT) and WSS respectively, which was the measured at four locations on chest and abdomen wall. The different degree of chest expansion from maximal end of expiration to maximal end of inspiration was confirmed at each location. The intra-rater ICC (1,1) with 95% confidence interval was used to assess the test-retest reliability, Pearson's correlation analysis was performed to establish the validity. [Results] All ICC values for intra-rater reliability were from 0.94 to 0.98 at all locations, which means that there is a high correlation. All values for validity showed significantly positive, indicating that there is a correlation between the measuring tape and WSS at four locations. [Conclusion] Compared to the measuring tape, WSS has been proved to have high reliability and validity. The finding of this research indicated that WSS is reliable to use for objective measurement of respiratory movements on the chest and abdomen wall in clinical assessment.

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Reliability and Validity of Measuring Respiration Movement Using a Wearable Strain Sensor in Healthy Subjects