Bone cement distribution is a potential predictor to the reconstructive effects of unilateral percutaneous kyphoplasty in OVCFs: a retrospective study

Table 4 VAS and ODI changes

Parameters	Group I	Group II	Group III
Pre-op VAS	8.06 ± 1.03	7.68 ± .839	7.77 ± .751
Post-op VAS	2.41 ± .507	2.45 ± .858	2.30 ± .708
VAS at following-up	1.65 ± .702	1.41 ± .503	1.47 ± .550
Pre-op/post-op VAS (P value)	.000*	.000*	.000*
Post-op VAS/following up VAS (P value)	.001*	.000*	.000*
Pre-op ODI	48.94 ± 3.15	49.14 ± 3.76	49.58 ± 3.40
Post-op ODI	21.47 ± 1.94	20.82 ± 3.89	20.63 ± 3.11
ODI at following up	7.88 ± 1.62	7.45 ± 1.26	8.26 ± 1.94
Pre-op/post-op ODI (P value)	.000*	.000*	.000*
Post-op ODI/following up ODI (P value)	.000*	.000*	.000*

VAS and ODI scores improved significantly after surgery and at following up. However, there was no significant difference of the changes among the three groups
Pre-op preoperative, Post-op postoperative, VAS visual analogue score, ODI Oswestry Disability Index
*P value by Wilcoxon matched-pair signed-rank test

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