TABLE 4.

Intraobserver Consensus Agreement^a

Adjudication Questions	Surgeons			Radiologists
	ICC	95% CI		ICC	95% CI
		Lower	Upper		Lower	Upper
Findings consistent with FAI?	0.41	−0.03	0.67	0.25	−0.32	0.57
Cam lesion?	0.86	0.76	0.92	0.72	0.50	0.84
Pistol-grip abnormality?	0.01	−0.73	0.44	0.68	0.44	0.82
Alpha angle >50.5?	0.19	−0.43	0.54	0.42	−0.01	0.67
Size of alpha angle?	0.84	0.72	0.91	0.91	0.84	0.95
Offset ratio of <0.17?	0.40	−0.06	0.66	0.71	0.49	0.83
Size of offset ratio?	0.82	0.68	0.90	−0.04	−0.82	0.41
Pincer lesion?	0.70	0.48	0.83	−0.13	−0.98	0.36
Crossover sign abnormality?	0.29	−0.25	0.59	0.26	−0.30	0.58
Posterior wall sign abnormality?	0.20	−0.40	0.54	0.48	0.08	0.70
Ischial spine sign abnormality?	0.55	0.20	0.74	0.80	0.65	0.89
Coxa profunda abnormality?	0.02	−0.72	0.44	0.52	0.16	0.73
Acetabular protrusio abnormality?	0.10	−0.57	0.49	−0.03	−0.81	0.41
Mixed FAI?	0.15	−0.49	0.52	0.45	0.04	0.69
Radiographic view most helpful?	0.00	−0.75	0.43	0.20	−0.40	0.54

^aBoldfaced values indicate an intraclass correlation coefficient (ICC) ≥0.61, suggesting at least good agreement. FAI, femoroacetabular impingement.