Table 6.

Changes over time in combined acetabular and femoral dGEMRIC indices after hip arthroscopy and surgical hip dislocation

Region	Group	Time point	Mean dGEMRIC index (ms)*	p value
				Baseline versus followup	Groups at baseline	Groups at followup	Change between groups	Change between region
Acetabulum	Hip arthroscopy	Baseline	520 ± 167	< 0.001	0.576	0.006	0.143	0.15
		Followup	448 ± 145
		Change	−72 ± 81
	Surgical hip dislocation	Baseline	521 ± 216	< 0.001				0.679
		Followup	408 ± 177
		Change	−113 ± 127
Femur	Hip arthroscopy	Baseline	478 ± 157	< 0.001	0.834	0.008	0.002
		Followup	417 ± 135
		Change	−61 ± 89
	Surgical hip dislocation	Baseline	495 ± 185	< 0.001
		Followup.	375 ± 115
		Change	−120 ± 137

^*Values are mean ± SD; means of peripheral and central regions of interest per hour position were used for calculation; for comparing changes over time between the acetabular and femoral cartilage, the difference between baseline and followup dGEMRIC indices was calculated at each clockface position; dGEMRIC = delayed gadolinium-enhanced MRI of cartilage.