Table III.

Proposed cut-off values of radiological JSW in millimeters used in studies based on predictive validity in hip and knee OA

Author	Year	Location	Cut-off mm	X-rays interval*, weeks	Study Duration†, weeks	End-Point‡
Maillefert	2002	Hip	0.4	104	156	1
Maillefert	2002	Hip	0.4	104	0	2
Bruyere	2005	Knee	0.7	36	60	1

^*X-ray interval = duration in weeks between the two films.

^†Study duration = duration in weeks between the date of the second X-ray and the time the end-point is collected.

^‡End-point: 1 = total articular replacement; 2 = expert opinion.