Table 4

Comparision of changes of the interspace angle between patients with LIV located at one vertebra above the lower end vertebra(group 1) and those with LIV located at lower end vertebra(group 2) (X ± S)

interspace angle

Group 1(n = 10)

Group 2(n = 20)

t value

P value

preoperative

3.1° ± 3.0°

3.3° ± 3.3°

0.161

0.873

postoperative

4.5° ± 3.8°

0.4° ± 6.7°

2.129

0.042

at final follow-up

9.3° ± 6.4°

2.6° ± 7.9°

2.316

0.028

Loss

4.8° ± 3.3°

1.2° ± 4.9°

2.073

0.047

Wang et al. Journal of Orthopaedic Surgery and Research 2007 2:17   doi:10.1186/1749-799X-2-17