Posterior Occipitocervical Fusion for Unstable Upper Cervical Trauma in Old and Elderly Population, Although Decreases Upper Cervical Rotation, Does Not Significantly Increase Neck Disability Index

Table 3

Correlation matrix between age, gender, and final follow-up roentgenographic parameters in 20 operated patients.

Parameters	Age	C2-C7 lordosis	Spinocranial angle	T1-slope	C2-C7 SVA	Neck tilt	Thorax inlet angle	Cervical tilt	Cranial tilt	C0-C2 angle
Gender	r = 0.340, = 0.182	r = 0.131,  = 0.616	r = 0.179,  = 0.492	r = −0.026,  = 0.921	r = −0.148,  = 0.572	r = −0.178,  = 0.493	r = -0.163,  = 0.533	r = 0.124, P = −0.636	r = −0.230,  = 0.374	r = −0.111,  = 0.672
Age	1	r = −0.107,  = 0.682	r = −0.022,  = 0.933	r = 0.284,  = 0.270	r = 0.070,  = 0.791	r = 0.020,  = 0.940	r = 0.304,  = 0.236	r = 0.291,  = 0.256	r = −0.014,  = 0.957	r = 0.263,  = 0.307
C2-C7 lordosis		1	r = −0.77,  = 0.770	r = −0.638,  = 0.006	r = 0.468,  = 0.058	r = 0.213,  = 0.412	r = −0.487,  = 0.047	r = −0.663,  = 0.004	r = 0.044,  = 0.866	r = 0.555,  = 0.021
Spinocranial angle			1	r = −0.412,  = 0.101	r = −0.068,  = 0.796	r = 0.383,  = 0.130	r = −0.127,  = 0.626	r = 0.051,  = 0.847	r = −0.708,  = 0.001	r = −0.231,  = 0.372
T1-slope				1	r = 0.016,  = 0.950	r = −0.398,  = 0.114	r = 0.714,  = 0.001	r = 0.788,  ≤ 0.001	r = 0.319,  = 0.213	r = −0.265,  = 0.304
C2-C7 SVA					1	r = −0.123,  = 0.637	r = −0.077,  = 0.768	r = −0.255,  = 0.238	r = 0.414,  = 0.099	r = 0.123,  = 0.637
Neck tilt						1	r = 0.357,  = 0.159	r = −0.106,  = 0.686	r = −0.447,  = 0.072	r = 0.247, = 0.339
Thorax inlet angle							1	r = 0.766,  ≤ 0.001	r = −0.16,  = 0.951	r = −0.081,  = 0.757
Cervical tilt								1	r = −0.333,  = 0.192	r = −0.336,  = 0.187
Cranial tilt									1	r = 0.112,  = 0.668

The results in bold present statistical significance with ; r = Pearson correlation coefficient; P = probability value.