Comparative assessment of flatfoot in preschool children.

Background: The increase or reduction of the medial longitudinal arch (MLA) can affect essential functions in the foot biomechanics with long-term health consequences. The aim of the present study was to determine the height of the MLA in children from 3 to 6 years of age through five methods of footprint analysis for the diagnosis of flat foot.

Methods: A cross-sectional observational study was conducted with 367 children aged 3 to 6 years in a municipality of the State of Mexico.