Bergo 2013.

Study characteristics
Methods	Design: cross‐sectional study Unit of randomization: parent
Participants	Location/Setting: single centre (paediatric radiology outpatient clinic at Haukeland University Hospital); Norway Sample size: 91 parents Number of withdrawals/dropouts: 12 Sex: intervention = 56 women, control = 23 women Mean age: intervention = 0.2 weeks (SD 0.6), control = 9.4 (SD 6.6) Graf: not reported Inclusion criteria: "healthy children; born term at the maternity unit, Haukeland University Hospital; with a diagnosis of uni‐ or bilateral DDH, as diagnosed sonographically in the newborn period; having received abduction treatment at the hospital’s outpatient clinic. Newborns with severe acetabular dysplasia, with or without hip instability, or mild dysplasia with dislocatable/dislocated femoral heads" Exclusion criteria: not stated
Interventions	Intervention (sample size): early splinting (n = 66), with Frejka pillow from birth (n = 63), Frejka and orthosis (n = 3) Control (sample size): late splinting from 5 weeks (n = 25), with Frejka pillow (n = 13), orthosis (n = 7), both (n = 5)
Outcomes	Primary outcome(s): parental concern/satisfaction (custom fitted questionnaire) Secondary outcome(s): psychosocial outcomes; anxiety (measurements not stated) Timing of outcome assessment: 4 weeks, 8 weeks, 1 year
Notes	Study start date: 2010 Study end date: 2011 Funding source: not stated Conflicts of interest: not stated Comment(s): none