Table 1.

Baseline characteristics

Baseline characteristics		Subjects eligible at baseline (n=1380)		Subjects with MRI reading (n=201)
		CC+	CC−	CC+	CC−
Subject level, n		114	1266	84	82
Age, mean (SD), year		70.1 (5.4)	68.3 (5.3)	68.8 (5.4)	69.0 (5.2)
BMI, mean (SD), kg/m2		28.0 (3.9)	28.9 (4.5)
Female, N(%)		65 (57.0)	803 (63.4)	47 (56.0)	46 (56.1)
Knee level, n		162	2030	102	99
KL grade, N(%)	0	26 (16.1)	379 (18.7)	13 (12.7)	12 (12.1)
	1	29 (17.9)	438 (21.6)	28 (27.5)	28 (28.3)
	2	107 (66.1)	1213 (59.8)	61 (59.8)	59 (59.6)