TABLE 4:

MRI Detection of Postoperative Abnormalities by Surgical Reference Standard

Type of Surgery (n = 43)	Sensitivity	Specificity	Positive Predictive Value	Negative Predictive Value
Femur débridement	98 (42/43)	NA	100 (42/42)	NA
Acetabular débridement	83 (15/18)	75 (15/20)	75 (15/20)	87 (20/23)
Chondral treatment	75 (6/8)	54 (19/35)	27 (6/22)	90 (19/21)
Labral surgery	100 (42/42)	100 (1/1)	100 (42/42)	100 (1/1)

Note—Data are percentage of abnormalities detected (number of abnormalities detected/total number of hips evaluated). NA = not applicable.