Table 3.

Comparison of means between pre- and postoperative vertebral parameters

Time point	N	Mean ± SD	Comparison		Difference between means		95% CI
							Min.	Max.
Anterior vertebral height (AVH) (mm)
Pre-op	37	17.6 ± 4.2	–		∆	p value*
Imm PO	37	18.6 ± 4.3	Pre-op		0.9919	0.001	− 1.3058	3.2896
12 M PO	32	17.7 ± 4.0	Pre-op		0.0968	0.009	− 2.2889	2.4825
Middle vertebral height (MVH) (mm)
Pre-op	37	13.6 ± 3.6	–		∆	p value
Imm PO	37	15.2 ± 3.5	Pre-op		1.6111	0.001	− 0.3441	3.5663
12 M PO	32	14.9 ± 3.5	Pre-op		1.2555	0.001	− 0.7746	3.2856
Posterior vertebral height PVH (mm)
Pre-op	37	21.1 ± 3.5			∆	p value
Imm PO	37	22.1 ± 3.8	Pre-op		1.0405	0.001	− 1.0193	3.1004
12 M PO	32	21.5 ± 3.8	Pre-op		0.4476	0.001	− 1.6912	2.5864
Vertebral volume (VVOL) (cm3)
Pre-op	37	21.6 ± 2.3			∆	p value
Imm PO	37	23.1 ± 2.4	Pre-op		1.4612	0.001	0.0073	2.9151
12 M PO	32	22.3 ± 3.1	Pre-op		0.7081	0.012	− 0.8015	2.2177
Local kyphosis (LK) (°)
Pre-op	37	12.2 ± 4.7			∆	p value
Imm PO	37	10.0 ± 4.1		Pre-op	− 2.228	0.001	− 4.699	0.243
12 M PO	32	10.8 ± 4.5		Pre-op	− 1.457	0.005	− 4.023	1.109
Vertebral kyphosis (VK) (°)
Pre-op	37	19.0 ± 11.3			∆	p value
Imm PO	37	13.9 ± 4.4		Pre-op	− 5.133	0.001	− 9.430	− 0.837
12 M PO	32	14.6 ± 5.4		Pre-op	− 4.448	0.001	− 8.909	0.013

^*p values from Wilcoxon analysis