Table 2.

Comparison of VAS, ODI, and RR.

Parameters	PKP group	PF+VP group	P value
VAS scores
Preoperative	9.0 ± 0.8	9.1 ± 0.7	0.775
Postoperative 3 days	4.0 ± 1.0	6.5 ± 0.9	<0.001
Postoperative 3 months	1.8 ± 1.1	4.1 ± 0.9	<0.001
Final follow-up	1.5 ± 1.0	1.4 ± 1.0	0.742
ODI scores
Preoperative	77.0 ± 9.7	76.9 ± 9.9	0.964
Postoperative 3 days	47.9 ± 9.6	67.3 ± 8.7	<0.001
Postoperative 3 months	31.3 ± 6.4	47.9 ± 8.2	<0.001
Final follow-up	30.3 ± 5.4	29.5 ± 4.0	0.448
RR (%)
Postoperative 3 days	36.8 ± 13.8	11.5 ± 14.4	<0.001
Postoperative 3 months	58.4 ± 11.2	37.1 ± 11.0	<0.001
Final follow-up	60.1 ± 9.3	61.2 ± 6.5	0.508

VAS: visual analogue scale; ODI: Oswestry Disability Index. RR = (preoperative ODI − postoperative ODI)/(preoperative ODI score)∗100%.