Table 3. Comparison of the lumbar VAS scores between the 2 groups.

Items	N (%)	Preoperative	7 days post operation
Group A	103 (48.36)	5.74±1.41	3.50±1.20
Group B	110 (51.64)	5.48±1.56	3.12±1.28
t		1.255	2.226
P value		0.211	0.027

Data are represented as mean ± SD or n (%). Group A: underwent conventional C-arm fluoroscopy-assisted system alone intervertebral foraminoscopic surgery; Group B: underwent 3D CT navigation-assisted intervertebral foraminoscopic surgery. VAS, visual analogue scale; t, t-test; SD, standard deviation; 3D CT, 3-dimensional computed tomography.