Table 2.

Comparison of postoperative recovery-related indexes in each group ($\overline{x}$ ± s).

Indexes	Mild group (n = 54)	Moderate group (n = 42)	Severe group (n = 18)	F	P
Recovery time (min)	6.23 ± 2.15	8.96 ± 1.85a	11.24 ± 2.37ab	45.800	<0.001
Preoperative JOA score	11.26 ± 1.25	10.66 ± 1.03a	9.88 ± 1.08ab	10.420	<0.001
Postoperative JOA score	15.26 ± 2.25	14.83 ± 1.68	13.96 ± 3.01	1.550	0.216
Improvement rate	69.99 ± 22.85	65.77 ± 23.46	57.30 ± 20.15	2.140	0.122

Note. ^aP  <  0.05 compared with the mild group; ^bP  <  0.05 compared with the moderate group.