Table 1

Linear pair correlation coefficients of spinal stenosis’ radiological criteria

Criteria	Total cross-sectional area	Cross-sectional area of dural sac	Cross-sectional area of left lateral canal	Cross-sectional area of right lateral canal	Total cross-sectional area of lateral canals	Anterio-posterior diameter of dural sac	Transverse diameter of dural sac	Ligamentous interfacet distance	Depth of the right lateral recess	Depth of the left lateral recess	Angle of the right lateral recess	Angle of the left lateral recess	Level of measuring
Total cross-sectional area	1	0.97	0.75	0.71	0.84	0.69	0.57	0.64	0.54	0.65	0.07	0.02	-0.51
Cross-sectional area of dural sac	0.97	1	0.64	0.62	0.73	0.73	0.53	0.64	0.53	0.62	0.1	0.01	-0.52
Cross-sectional area of left lateral channel	0.75	0.64	1	0.51	0.89	0.4	0.48	0.36	0.33	0.61	-0.1	0.18	-0.27
Cross-sectional area of right lateral channel	0.71	0.62	0.51	1	0.84	0.34	0.48	0.48	0.53	0.4	0.01	-0.1	-0.28
Total cross-sectional area of lateral canals	0.84	0.73	0.89	0.84	1	0.43	0.55	0.48	0.48	0.59	0	0.03	-0.32
Anterio-posterior diameter of dural sac	0.69	0.73	0.4	0.34	0.43	1	0.21	0.42	0.14	0.23	0.07	-0.1	-0.28
Transverse diameter of dural sac	0.57	0.53	0.48	0.48	0.55	0.21	1	0.59	0.48	0.53	0.26	0.15	-0.31
Ligamentous interfacet distance	0.64	0.64	0.36	0.48	0.48	0.42	0.59	1	0.3	0.3	0	-0.1	-0.47
Depth of the right lateral recess	0.54	0.53	0.33	0.53	0.48	0.14	0.48	0.3	1	0.72	0.4	0.13	-0.15
Depth of the left lateral recess	0.65	0.62	0.61	0.4	0.59	0.23	0.53	0.35	0.72	1	0.2	0.14	-0.37
Angle of the right lateral recess	0.07	0.1	-0.1	0.01	0	0.07	0.26	0	0.4	0.2	1	0.25	-0.12
Angle of the left lateral recess	0.02	0.01	0.18	-0.2	0.03	-0.1	0.15	-0.1	0.13	0.14	0.25	1	-0.14
Level of measuring	-0.51	-0.52	-0.27	-0.28	-0.32	-0.28	-0.31	-0.48	-0.15	-0.37	-0.12	-0.14	1