Comment on Sewell and Eastwood: Screening and treatment in developmental dysplasia of the hip—where do we go from here?

Dear Sir,

After reading the article by Sewell and Eastwood entitled “Screening and treatment in developmental dysplasia of the hip—where do we go from here?” [1], I found there may be an error. To make the classification more clear, the table should read:

Graf 2b: 50°≦α-angle<60° [2] instead of Graf 2b: 43°≦α-angle<60°.

Besides, the β angle also has a typing error in the table when describing Graf 2c and 2d hips. The table should read:

Graf 2c: 43°≦α-angle≦49°, β-angle<77°

Graf 2d: 43°≦α-angle≦49°, β-angle>77°