Sex assessment using the proximal tibia

The proximal end of the human tibia is sexually dimorphic. Tibial condyles from 100 individuals in the Hamann-Todd Collection were measured. Regression equations retrodicted known sex with 86-95% accuracy. A test sample of 20 individuals also from the Hamann-Todd Collection was classified with 85-100% accuracy. A sample of 20 prehistoric individuals provisionally sexed by using crania and innominate bones was classified with 85-100% agreement. Thus, the proximal tibia may be useful in determining the sex of a skeleton.