Table 2.

Rates of one-year change in the medial femorotibial compartment (MFTC), according to radiographic strata based on the OAI site and central readings

	Site readings				Central readings (BU)
	n=	MFTC MC			n=	MFTC MC
		(µm)	CI 95%	SRM		(µm)	CI 95%	SRM
Healthy	112	+2	[−10;20]	0.02	101	+2	[−10;20]	0,02
medJSN 0	428	−15	[−25; −5]	−0,14	356	−14	[−30;1]	−0,13
medJSN 1	217	−43	[−60; −26]	−0,34	209	−31	[−50; −13]	−0,25
medJSN 2	(collapsed with gr. 1)				116	−70	[−99; −41]	−0,44
medJSN 3	73	−86	[−121; −51]	−0,57	43	−72	[−108; −35]	−0,59

MC = mean change; CI 95% = [lower bound; upper bound] of the 95 confidence interval; SRM = standardized response mean = mean/SD change; medJSN = OARSI grade of medial radiographic joint space narrowing