Gallo MC, Tucker DW, Reddy A, et al. - In this study, individual bilateral differences (IBDs) in tibial torsion in a diverse population were ascertained. Researchers used CT scans of uninjured bilateral tibiae to ascertain tibial torsion and IBDs in torsion using 4 measurement methods. They also recorded age, gender, and self-identified race/ethnicity for each subject. They compared the mean tibial torsion and IBDs in torsion in the overall cohort and when stratified by gender and race/ethnicity. They applied simple and multiple linear regression models to correlate demographic variables with tibial torsion and IBDs in torsion. A total of 195 patients were included in this study. The data demonstrate that tibial torsion varies considerably and individual side-to-side differences are common. It was shown that race/ethnicity was correlated with differences in the magnitude of tibial torsion, but no factors were associated with bilateral differences in torsion. The outcomes of this research may be clinically significant in the context of using the uninjured contralateral limb to help establish rotational alignment during medullary nail stabilization of diaphyseal tibia fractures. In addition, these outcomes should be considered in the assessment of tibia rotational malalignment.