Fig. 4

Multiple line, color-coded, diagram illustrating the intra-operative, radiographic and true operative cup inclination values for each hip arthroplasty performed with the use of an inclinometer. Data provided can be used to identify underlying cause for inclination being out of target for each of the 100 cases in the group. Identifying the difference in value for each of the cases in the study. By assessing the angular differences between TOI (orange line) and IOI (blue line) (i.e. measure of ΔPelvicPosition) and the differences between RI (green line) and TOI (orange line) (i.e. measure of ΔDefinition), one can determine what was the underlying cause for each of the outliers seen in this study