Apoptosis of endplate chondrocytes in cervical kyphosis is associated with chronic forward flexed neck: an in vivo rat bipedal walking model

Table 1 Radiological outcomes of the normal group, bipedal rat group, and forward flexed neck group

Cervical curvature	Pre-experiment	2 weeks	4 weeks	6 weeks	P value*
Bipedal rat group	− 7.3 ± 0.4	− 7.5 ± 0.5	− 7.3 ± 0.5	− 7.5 ± 0.6
Normal group	− 7.4 ± 0.4	− 7.3 ± 0.4	− 7.4 ± 0.5	− 7.4 ± 0.5
Forward flexed neck group	− 7.6 ± 0.5	− 3.9 ± 0.8	10.7 ± 1.0	20.5 ± 2.1	< 0.001
P value^#		< 0.001	< 0.001	< 0.001

Values are presented as the mean ± standard deviation (SD)
“−” indicates lordosis and “+” indicates kyphosis
*Pre-experiment and final follow-up in the same group
^#Between groups (between the forward flexed neck group and normal group, between the forward flexed neck group, and bipedal rat group)

ISSN: 1749-799X