Table 1 Correlations between the individual radiographic features by vertebral level.

	Osteophytes				Sclerosis				Vertebral Narrowing
	L1/2	L2/3	L3/4	L4/5	L1/2	L2/3	L3/4	L4/5	L1/2	L2/3	L3/4	L4/5
Osteophytes
L1/2	–	–	–	–	–	–	–	–	–	–	–	–
L2/3	0.45*	–	–	–	–	–	–	–	–	–	–	–
L3/4	0.38*	0.59*	–	–	–	–	–	–	–	–	–	–
L4/5	0.27*	0.36*	0.45*	–	–	–	–	–	–	–	–	–
Sclerosis
L1/2	0.51*	0.33*	0.28*	0.16*	–	–	–	–	–	–	–	–
L2/3	0.34*	0.53*	0.36*	0.20*	0.51*	–	–	–	–	–	–	–
L3/4	0.22*	0.38*	0.48*	0.26*	0.33*	0.50*	–	–	–	–	–	–
L4/5	0.19*	0.17*	0.20*	0.44*	0.23*	0.27*	0.36*	–	–	–	–	–
Vertebral narrowing
L1/2	0.36*	0.17*	0.09	0.02	0.47*	0.34*	0.20*	0.21*	–	–	–	–
L2/3	0.24*	0.34*	0.18*	0.03	0.32*	0.48*	0.31*	0.19*	0.62*	–	–	–
L3/4	0.18*	0.28*	0.27*	0.08*	0.22*	0.35*	0.44*	0.22*	0.46*	0.66*	–	–
L4/5	0.17*	0.16*	0.15*	0.28*	0.16*	0.17*	0.21*	0.44*	0.34*	0.38*	0.53*	–

*p<0.05.