	Operated hips at 12 weeks		Operated hips at 18 weeks		p
Angle	Median	Interquartile range (C25-C75)	Median	Interquartile range (C25-C75)	p
AI	22.43˚	22 - 23	24.50˚	31.125 - 31.9	0.001
CE	28.0˚	27 - 29.5	25˚	23˚ - 26.5˚	0.002
AS	56.0˚	55˚ - 57.5˚	59˚	58˚ - 61.5˚	0.002
ADI	31.5%	30% - 32.5%	28.8%	27% - 29.5%	0.002
Acetabular anteversion (AA)	12.5˚	11.5˚ - 13˚	11˚	10˚ - 11.5˚	0.002