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→Measurements in children: +Reimer's
*(D) The '''acetabular index''' measures the acetabular roof slope. It is the most useful measure of acetabular dysplasia until 6 years of age. It is formed between Hilgenreiner line and the acetabular roof. In newborns, values of '''30° ±4° in females''' and '''26° ±5° in males''' are considered normal. Gradually this angle becomes smaller, with a mean value of '''20° ±3° in females''' and '''18° ±4° in males''' at 1 year of age.
*(E) The '''medial articular joint space''' is measured between the medial border of the femoral head or neck (when epiphysis is not ossified) and the acetabular platform. Normal values range between 5 and 12 mm. Differences greater than 1.5 mm between the two sides are considered abnormal.
{|class="wikitable"
| [[File:Reimer's migration index (crop).png|300px]] || Also, Reimer's migration index can be used to indicate hip dislocation. The migration index (MI) is normally less than 33%.<ref>{{cite web|url=http://www.actaorthopaedica.be/acta/download/2008-5/06-Persiani%20et%20al.pdf|title=Hip subluxation and dislocation in cerebral palsy: Outcome of bone surgery in 21 hips|author1=Pietro PERSIANI|author2=Iakov MOLAYEM|year=2008|author3=Alessandro CALISTRI|author4=Stefano ROSI|author5=Marco BOVE|author6=Ciro VILLANI|journal=Acta Orthop. Belg.}}</ref>
|}
==Measurements in adults==
