Reliability and validity analysis of smartwatches use for healthcare

Examine the reliability and validity of smartwatches measuring heart rate and Blood Pressure. Methods: Eighty-eight healthy participant is recruited to be measured heart rate and Blood Pressure. the reliability and validity were determined by comparing the smart-watches with the home standard Blood Pressure using mean differences, Bland Altman plot, Interclass correlation (ICC) and Cronbach's alpha. Results: the reliability varied with ICC ranging from 0.533 to 0.852. Two smartwatches showed relatively weak ICC and broad limits of agreement of the Bland–Altman plots at both, heart rate and Blood Pressure Measurement. For heart rate measurement, F1 Smartband Bracelet Watch showed slightly better results than Y2 Plus Smart Wrist Band. conversely, Y2 Plus Smart Wrist Band demonstrated the best accuracy at Systolic measurement. And for Diastolic Blood Pressure was relatively the same in the reliability and validity. Conclusion: reliability and validity of smartwatches use, especially for healthcare still less of accuracy for the clinical standard because the icc was lower than <0.9. but for everyday use, it is good reliability and validity. For future work, the accuracy of sensor reading of smartwatches needs to im-prove to reach the clinical standard.