Predicted Versus Measured Thoracic Gas Volume for the Bod Pod® Air Displacement Plethysmography System
Date of Award:
Master of Science (MS)
Kinesiology and Health Science
Department name when degree awarded
Health, Physical Education, and Recreation
Dale R. Wagner
John M. Kras
The purpose of this study was to determine whether there is a significant difference between measured values of thoracic gas volume (MTGV) and predicted values of thoracic gas volume (PTGV) using the Bod Pod®. One hundred and thirteen college freshmen, both males and females, were tested using the Bod Pod® by first measuring thoracic gas volume with the Bod Pod® technique, then by using pre-determined values based on height, weight, and age that predict thoracic gas volume. Results of a paired t test showed that measured thoracic gas volume and predicted thoracic gas volume were significantly different. A Pearson’s product-moment correlation coefficient was calculated to be r = .60 which is significant at the p ≤ .05 level. A Bland and Altman plot was used to reveal any variability about the mean for individual participants MTGV and PTGV and the averages of each. A Pearson’s product-moment correlation coefficient was calculated for the data in the Bland and Altman plot. The correlation was calculated as .56, which is significant at the p ≤ .001 level. It was concluded that within the limitations of this study, there is a significant difference between MTGV and PTGV when using the Bod Pod® air displacement plethysmography system.
Blaney, Phil A., "Predicted Versus Measured Thoracic Gas Volume for the Bod Pod® Air Displacement Plethysmography System" (2008). All Graduate Theses and Dissertations. 113.
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