Gou 2021.

Study characteristics
Methods	Design: retrospective Unit of randomization: baby
Participants	Location/Setting: single; China Sample size: 134 babies (100 unilateral, 68 = bilateral) Number of withdrawals/dropouts: not stated Sex: 149 girls, 19 boys (hips not babies) Mean age: 0‐3 months (n = 66), 4‐6 months (n = 102) hips not babies Graf: not reported at baseline Inclusion criteria: 0 to 6‐month‐old babies who underwent either Pavlik harness or human position brace for developmental dislocation of the hip, as confirmed by x‐ray imaging or ultrasound. Exclusion criteria: diagnosis of DDH (Graf IIa, IIb, IIc, IId), other deformities (joint contracture, scoliosis, cerebral palsy), or if with incomplete clinical data
Interventions	Intervention (sample size): human brace (n = 87; 106 hips) Intervention 2 (sample size): Pavlik harness (n = 47; 62 hips)
Outcomes	Primary outcome(s): reduction success rate Secondary outcome(s): acetabular index, upper space, inner space Timing of outcome assessment: unclear
Notes	Study start date: 2016 Study end date: 2020 Funding source: none Conflicts of interest: the authors declare no conflicts of interest. Comment(s): none