Table 5.

Summary of Japanese Orthopaedic Association and Neck Disability Index Scores in Patients Treated Nonoperatively Versus Surgically: Results Derived From Li et al.⁹

	Nonoperativea	Surgerya	P
Pretreatment JOA score	14.37 ± 0.97	14.23 ± 1.07	.365
Posttreatment JOA score	15.45 ± 0.92	15.60 ± 0.91	.891
JOA recovery ratio (%)b	43.86 ± 29.55	52.83 ± 27.44	.646
Pretreatment NDI (%)	20.82 ± 4.24	21.15 ± 4.98	.303
Posttreatment NDI (%)	18.73 ± 4.54	18.03 ± 4.76	.991

Abbreviations: JOA, Japanese Orthopaedic Association; NDI, Neck Disability Index.

^aValues shown are mean ± standard deviation.

^b(Posttreatment JOA score − pretreatment JOA score)/(17 − pretreatment JOA score) × 100%.