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Sonographic surveillance of children with mild stable hip dysplasia reduced the need for active treatment

Statistics from



Randomised controlled trial.


Opaque, sealed and numbered envelopes.


Outcome radiograph assessment was blinded to any therapeutic intervention.


Paediatric radiology and outpatient department in a Norwegian university hospital.


128 infants aged 1–3 days old, with mild stable hip dysplasia defined ultrasonographically and clinically.


Either immediate abduction splinting for at least 6 weeks with subsequent sonography determining further treatment (control group), or active sonographic surveillance at 6 weeks and 3 months determining splinting (investigation group).


Radiographic appearance of the hips at 1 year, with groups being compared using the acetabular index, a measure of acetabular formation.

Follow-up period

1 year.

Patient follow-up

All 128 patients …

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