Table 5.

Baseline chondrocalcinosis and synovitis at year 0 and year 4

CC at baseline	Hoffa synovitis (0–3)		Effusion-synovitis (mm)
	mean (95% CI)	p-value	mean (95% CI)	p-value
All KL grades
at year 0
CC− (n=99)	0.7 (0.6, 0.8)	0.30	3.4 (2.9, 3.9)	0.67
CC+ (n=102)	0.8 (0.7, 0.9)		3.7 (3.2, 4.3)
at year 4
CC− (n=99)	0.9 (0.8, 1.0)	0.37	3.7 (3.2, 4.2)	0.94
CC+ (n=102)	0.9 (0.8, 1.0)		3.6 (3.1, 4.1)
KL grade 0
at year 0
CC− (n=12)	0.4 (0.1, 0.7)	0.22	3.1 (1.3, 4.8)	0.44
CC+ (n=13)	0.6 (0.2, 1.0)		2.9 (1.6, 4.2)
at year 4
CC− (n=12)	0.7 (0.3, 1.1)	0.49	2.5 (1.3, 3.5)	0.97
CC+ (n=13)	0.8 (0.4, 1.1)		3.0 (1.8, 4.3)
KL grade 1
at year 0
CC− (n=28)	0.8 (0.5, 1.0)	0.63	3.1 (2.3, 3.9)	0.12
CC+ (n=28)	0.8 (0.6, 1.0)		3.5 (2.5, 4.4)
at year 4
CC− (n=28)	0.9 (0.6, 1.1)	0.31	3.5 (2.7, 4.4)	0.51
CC+ (n=28)	1.0 (0.8, 1.1)		3.3 (2.4, 4.2)
KL grade 2
at year 0
CC− (n=59)	0.8 (0.6, 0.9)	0.84	3.6 (3.0, 4.3)	0.58
CC+ (n=61)	0.8 (0.6, 0.9)		4.1 (3.4, 4.7)
at year 4
CC− (n=59)	0.9 (0.7, 1.1)	0.99	4.0 (3.4, 4.6)	0.52
CC+ (n=61)	0.9 (0.8, 1.1)		3.9 (3.2, 4.5)