Table 2.

Interobserver reliability as related to the different radiologic parameters analyzed in the footballers’ hips

Observer 1 vs. Observer 2	Inter-rater reliability	95% Confidence interval
		Minimum Level	Maximum Level
Lateral center edge angle	0.91	0.90	0.92
Acetabular index	0.89	0.87	0.91
Extrusion index	0.85	0.83	0.88
Cross over sign	0.85	0.82	0.87
Posterior wall sign	0.86	0.84	0.88
Depth of acetabular fossa	0.93	0.90	0.98
Ischial spine sign	0.92	0.89	0.94
Femoral head-neck defomity	0.89	0.87	0.92
Herniation pit	0.97	0.96	0.98
Os acetabuli	0.90	0.86	0.93