Table 2.

Comparison of various parameters between the PG group and the OG group

	PG (26)	OG (21)	P value
VAS score (6 months)	2.46 ± 0.91	2.62 ± 0.87	0.475
VAS score (1 year)	1.42 ± 0.58	1.62 ± 0.50	0.249
Improvement rate (%)	80.90 ± 7.51	77.56 ± 7.94	0.204
Cobb angle (6 months)	13.68 ± 10.04	11.75 ± 6.43	0.700
Cobb angle (1 year)	13.45 ± 9.99	11.53 ± 6.38	0.716
Improvement rate	50.05 ± 19.89	52.42 ± 16.34	0.663
SF-Qualiveen score	1.81 ± 1.20	1.67 ± 1.07	0.782
Improvement rate (%)	71.99 ± 14.66	73.55 ± 13.35	0.796
ASIA grade			0.566
D	4	5
E	8	6
No change	14	10
Improvement rate (%)	33.33	66.67	0.486
Recovery rate (%)	45.45	54.55	0.870
Perioperative complications	2	6	0.115
Operative duration (min)	127.27 ± 21.17	153.29 ± 78.10	0.007
Blood loss (ml)	292.15 ± 177.66	409.81 ± 101.47	< 0.001
Bed rest duration (d)	2.52 ± 0.57	3.83 ± 0.64	< 0.001
Modified MacNab score			0.969
Excellent	17	14
Good	7	5
Average	2	2
Poor	0	0
Improvement rate (%)	92.31	90.48	0.610