Table 2.

Frequency of cartilage lesions and osteophytes of the patella

		Patella medial margin		Patella [crista]		Patella [lateral margin]
		N	%	n	%	n	%
ICRS grade	0	560	46.7	598	49.9	534	44.5
	1	176	14.7	138	11.5	172	14.3
	2	294	24.5	267	22.3	244	20.4
	3	143	11.9	173	14.4	178	14.8
	4	17	1.4	23	1.9	68	5.7
Osteophytes	5	9	0.8			3	0.3