Clinical effect evaluation and correlation between preoperative imaging parameters and clinical effect of endoscopic Transforaminal decompression for lumbar spinal stenosis

Table 5 Correlation analysis between CT/MRI parameters and therapeutic effects

	VAS		ODI		Walking distance
	r	P	r	P	r	P
Bony vertebral canal area by CT measurement	0.166	0.124	0.167	0.122	0.136	0.210
Cross-sectional area of the dural sac by MRI measurement	0.112	0.304	0.024	0.826	0.195	0.071
Nerve root canal bony area by CT measurement	−0.119	0.272	0.035	0.750	0.001	0.992
Yellow ligament thickness by MRI measurement	0.162	0.133	0.012	0.909	0.122	0.260
Real spinal canal area by CT measurement	−0.041	0.705	−0.102	0.348	0.044	0.687
Nerve root canal real area by CT measurement	−0.179	0.098	−0.103	0.344	0.008	0.943
Vertebral canal sagittal diameter by CT measurement	0.139	0.198	0.050	0.643	0.055	0.613
Distance between the articular joints by CT measurement	0.366	< 0.001	0.222	0.039	0.377	< 0.001
Soft tissue invasion ratio of the vertebral canal	0.228	0.021	0.213	0.047	0.261	0.024
Invasion ratio of the nerve root canal	0.262	0.014	0.290	0.006	0.350	0.001

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