Access Type

Open Access Dissertation

Date of Award

January 2016

Degree Type


Degree Name



Education Evaluation and Research

First Advisor

Shlomo S. Sawilowski


The prevailing method for biomedical device interchangeability is a scatterplot of means and differences bounded by levels of agreement (Bland-Altman Plot) which results in subjective judgments made in the discernment of differences in data distribution and fit. The purpose of this study was to test four statistics - the Kolmogorov-Smirnov test, and three fit indices (NFI, GFI, & CFI) in order to identify a more objective statistic for device interchangeability. The Kolmogorov-Smirnov test proved incompatible with the data structure. The Normed Fit Index (NFI) proved most sensitive to correlation shifts where the Goodness of Fit Index (GFI) and Comparative Fit Index (CFI) would be useful for starting values. The result is the recommendation to report all three indexes in conjunction with the construction of a Bland-Altman plot.