Jagar Omar Doski

Duhok Emergency Teaching Hospital , Iraq

Title: An upgrade of the international hip dysplasia institute classification for the developmental dysplasia of the hip


Background and Objectives: The purpose of the current study was to upgrade the International Hip Dysplasia Institute (IHDI) classification for Developmental Dysplasia of the Hip (DDH).

Methods: The upgrading was suggested by adding the state of the acetabulum (Type A for the normal acetabulum and Type B for the dysplastic one). The pelvic radiographic films of 110 children suspected to have DDH were used by three observers to sort out the hips into grades according to the original form and the suggested upgraded one subsequently. 

Results: The interobserver reliability between the observers improved from a good level (ICC 0.885, 95% CI 0.856-0.909) with the original form to an excellent one (ICC 0.919, 95% CI  0.898-0.936) when the upgraded form was used. When the upgraded form was used, only the hips of Grade 1 were distributed into Types A and B. While those hips assessed as Grade 2, 3, and 4 were all graded as Type B only.

Conclusion: The IHDI classification for DDH can be upgraded into Grade 1A, Grade 1B, Grade 2, Grade 3, and Grade 4.


Jagar Omar Doski was graduated from the College of Medicine, University of Mosel at 1996. He fulfilled the requirements for the Fellowship of the Iraqi Commission for Medical Specialization in Baghdad and awarded Ph.D. degree in Orthopedic surgery at 2004. He became a Consultant Orthopedic Surgeon at 2017. He achieved the Assistant Professor promotion degree from the College of Medicine, University of Duhok at 2021. He is working as an Orthopedic Surgeon in the Orthopedic Department, Duhok Emergency Teaching Hospital since 2004 till now. He is one of the teaching staff in the Department of Surgery, College of Medicine, University of Duhok since 2004 till now for the Orthopedics subject. He published 10 articles in peer reviewed medical journals.