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 2

Correlation matrix between age, gender, and roentgenographic parameters in 29 asymptomatic individuals.

Parameters	Gender	C2-C7 lordosis	T1-slope	Spinocranial angle	C2-C7 SVA	Neck tilt	Thorax inlet angle	Cervical tilt	Cranial tilt	C0-C2 angle
Age	r = −0.169,	r = −0.470,	r = 0.452,	r = −0.174,	r = 0.244,  = 0.201	r = 0.077,  = 0.693	r = 0.450,  = 0.014	r = 0.357,  = 0.057	r = 0.293,  = 0.122	r = 0.021,  = 0.914
Gender	1	r = 0.435,	r = 0.094,	r = −0.441,	r = 0.453, = 0.014	r = 0.109,  = 0.575	r = 0.158,  = 0.412	r = −163,  = 0.399	r = 0.354,  = 0.059	r = 0.258,  = 0.177
C2-C7 lordosis		1	r = −0.481,	r = −0.12,  = 0.269	r = 0.161,  = 0.403	r = 0.215,  = 0.264	r = −0.271,  = 0.155	r = −667,  ≤ 0.001	r = 0.043,  = 0.823	r = 0.482,  = 0.008
T1-slope			1	r = −0.348,  = 0.06	r = 0.468,  = 0.011	r = −0.210,  = 0.273	r = 0.728,  ≤ 0.001	r = 0.790,  ≤ 0.001	r = 0.649,  ≤ 0.001	r = −0.059,  = 0.762
Spinocranial angle				1	r = −0.663,  ≤ 0.001	r = −0.172,  = 0.372	r = −0.426,  = 0.021	r = 0.102,  = 0.6	r = −0.693,  ≤ 0.001	r = −0.407,  = 0.029
C2-C7 SVA					1	r = 0.230,  = 0.229	r = 0.571,  = 0.001	r = −0.114,  = 0.557	r = 0.902,  ≤ 0.001	r = 0.204,  = 0.288
Neck tilt						1	r = 0.517,  = 0.04	r = −0.361,  = 0.055	r = 0.104,  = 0.591	r = 0.173,  = 0.368
Thorax inlet angle							1	r = 0.439,  = 0.017	r = 0.642,  ≤ 0.001	r = 0.173,  = 0.368
Cervical tilt								1	r = 0.046,  = 0.82	r = −0.294,  = 0.121
Cranial tilt									1	r = 0.269,  = 0.269

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