Table 2.

Treatment prior to THR for the 132 hips with a confirmed DDH in the Norwegian Arthroplasty Register

Hips	n (%)	n (% of 88)
Hip preserving treatment	88 (67)
Frejka pillow		10 (11)
Hip spica cast		51 (58)
Traction		41 (47)
Orthosis		4 (5)
Hip-preserving surgery		81 (92)
No treatment prior to THR	34 (26)
No information on prior treatment	10 (8)
Total	132 (100)