Validation of a Novel Physical Activity Assessment Device in Morbidly Obese Females
Mixed effect models for predicted speed by the IDEEA monitor are shown in cases (a) and in controls (b). The graphs show how the IDEEA monitor readings of speed during walking predict the actual speed measured by a treadmill (meters/min). The 45 degree line on the figure is where all the predicted dots should be in a perfect world. The IDEEA monitor does as well as the treadmill in measuring walking speed with greater than 95% correlation. Although we observe a tendency for the IDEEA monitor to underestimate speed in morbidly obese cases, this difference is not statistically significant.