Hip MRI in flexion abduction external rotation for assessment of the ischiofemoral interval in patients with hip pain—a feasibility study

Insights into Imaging

Table 3 Diagnostic thresholds and associated parameters for predicting quadratus femoris muscle edema

	Threshold	Sensitivity (%)	Specificity (%)	AUC	95% CI
Proximal intertrochanteric distance
In FABER position	≤ 7 mm	100	81	.89	.82–.94
In neutral position	≤ 38 mm	88	58	.80	.72–.87
Distance intertrochanteric distance
In FABER position	≤ 15 mm	88	71	.81	.73–.88
In neutral position	≤ 28 mm	100	49	.81	.73–.88
Ischiofemoral space
In neutral position	≤ 20 mm	88	77	.87	.73–.92

AUC Area und the curve, CI Confidence interval, FABER Flexion-abduction-external rotation