The development of tibiofibular torsion.

We studied the angle of torsion of the leg in both lower limbs of 1607 schoolchildren of both sexes (1010 girls and 597 boys) aged between 3 and 17 years. Statistical differences were observed between one lower limb and the other in girls at the ages of 3, 8, 9, 10, 12, and 13 years but in boys no differences were observed. No statistical differences were found between the angle of torsion from one age to the next, except between the angles of 11 years and 12 years old boys. The torsional angle varies from approximately 5 degrees at 3 years to 17 degrees at 17 years, with a slight, inconsistent increase in both sexes.