Table 1.

Agreement of osteophyte scoring based on the OARSI grading between the experienced reader and the inexperienced reader

Grades by the experienced reader	Grades by the inexperienced reader
	0	1	2	3	Total
0	142	4	6	1	153
1	31	12	5	1	49
2	10	16	12	2	40
3	10	5	30	33	78
Total	193	37	53	37	320

Eighty knees were observed at four locations (lateral femur, medial femur, lateral tibia, medial tibia) per knee, totaling 320 observations per reader. One score was assigned for each location. In case of a single osteophyte in a location, the score is based on that osteophyte. In case of multiple osteophytes in a location, only the score of the largest osteophyte was recorded.