Table 3.

Lateral Femoral Bone Bruise Area Predictive Values for Chondral Wear at the Lateral Femur

Area of Bone Bruise, %	Outerbridge Grade at 5 Years	Probability, %	95% CI	P Value
0	0	56	37 to 75	<.001
	1 or 2	31	16 to 46	<.001
	3 or 4	13	2 to 25	.02
50	0	23	4 to 42	.01
	1 or 2	37	21 to 54	<.001
	3 or 4	40	15 to 65	.002
100	0	6	–8 to 20	.39
	1 or 2	20	–11 to 50	.20
	3 or 4	74	31 to 118	.001
150	0	1	–4 to 7	.61
	1 or 2	6	–14 to 26	.56
	3 or 4	93	68 to 100	<.001