Table 1 Year of Chingford study and duration of follow up for the x rays available, by anatomical site.

Site of x ray		Reader		No of x rays		Year of study		Duration of follow up (y)		Score	κ Values
Lumbar spine		GH*		796		1, 9		9		OS, DSN	κ = 0.89 κ = 0.78
Hand		GH*		704		1, 11		11		OS, JSN	κ >0.70
Hip		GH*		800		2, 8		7		OS, JSN	κ >0.70
Knee		DH†		914		1, 10		10		OS, JSN	κ = 0.79 κ = 0.70

*G Hassett; †D J Hart.

DSN, disc space narrowing; JSN, joint space narrowing; OS, osteophytes; y, years.