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Invited Commentary

MJ Mueller, PhD, PT, is Assistant Professor, Program in Physical Therapy, Washington University School of Medicine, 509 S Euclid Ave, St Louis, MO 63110

This excerpt was created in the absence of an abstract.

Before addressing the important clinical implications this study provides, I will comment on selected methodological issues.

Inclusion criteria required subjects in this study to have a forefoot varus deformity of at least 8 degrees. Several authors^1,2 have reported poor reliability for foot and ankle goniometric measurements. These studies, however, were conducted with testers having limited training with the measures. The reliability estimates obtained by Johanson et al, and my own experience,^3,4 indicate that with adequate training, the measures can be performed reliably. Although the measures are important for describing the study population, the clinical usefulness of the measures is questionable and will be discussed later in this commentary.

I think the authors adequately describe the limitations of using two-dimensional motion analysis to study three-dimensional rear-foot kinematics. Several questions arise, however, about the methods for obtaining rear-foot kinematic measurements....

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