Factors affecting postoperative mortality of patients with insufficient union following osteoporotic vertebral fractures and impact of preoperative serum albumin on mortality

Table 2 Pre- and postoperative patient VAS scores (lumbar and leg) and Modified Frankel classification

	Preoperative	1 year after surgery	p-value
VAS score (lumbar)	7.4 ± 3.4	5.8 ± 3.8	< 0.05*
VAS score (leg)	6.7 ± 2.8	3.4 ± 2.1	< 0.05*
Modified Frankel classification (A/B/C/D/E)	0/0/44/39/22	0/0/28/42/31	< 0.05^†

*Mean ± standard deviation, unless otherwise indicated
*P < 0.05 in the comparison between groups
^†p value for Fisher’s exact test for Modified Frankel classification C versus D or E
VAS visual analog scale

ISSN: 1471-2474