Halo traction combined with posterior-only approach correction for cervical kyphosis with Neurofibromatosis-1: minimum 2 years follow-up

Table 3 Improvement of JOA score and statistical results

Parameters	Mean ± SD	T value	P value
Pre-Tc vs. Post-Op	13.3 ± 1.6 vs. 16.2 ± 0.7	−11.02	<0.01
Post-Op vs. Follow-up	16.2 ± 0.7 vs. 16.5 ± 0.6	−1.895	0.07

ISSN: 1471-2474