Expansive open-door laminoplasty secured with titanium miniplates is a good surgical method for multiple-level cervical stenosis

Table 4 Preoperative/Postoperative function status and their correlation to recovery rate ( N = 104)

Items	Preop	Postop	Postop-preop	Postop-preop		Preop vs. RR
Items	Mean (SD)	Mean (SD)	Mean (SD)	t	P	r	P
Nurick score	3.2 ± 1.1	0.9 ± 1.3	−2.3 ± 0.9	26.18	<0.001	−0.50	<0.001
VAS	5.1 ± 1.8	2.3 ± 2.2	−2.9 ± 2.4	12.38	<0.001	−0.41	<0.001
JOA score	10.3 ± 2.9	15.0 ± 2.1	4.7 ± 2.0	−24.04	<0.001	0.50	<0.001
JOA upper extremities motor function	2.1 ± 1.0	3.5 ± 0.8	1.5 ± 0.8	−17.50	<0.001	0.43	<0.001
JOA lower extremities motor function	1.9 ± 1.2	3.4 ± 0.9	1.5 ± 0.9	−16.47	<0.001	0.37	<0.001
JOA upper extremities sensory function	0.6 ± 0.6	1.4 ± 0.5	0.9 ± 0.4	−20.57	<0.001	0.45	<0.001
JOA lower extremities sensory function	1.2 ± 0.7	1.7 ± 0.5	0.5 ± 0.5	−9.40	<0.001	0.22	0.026
JOA trunk sensory function	1.8 ± 0.5	1.9 ± 0.2	0.2 ± 0.4	−4.36	<0.001	−0.03	0.784
JOA bladder function	2.7 ± 0.7	2.9 ± 0.2	0.2 ± 0.6	−3.58	0.001	0.11	0.267

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