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 4

Pearson correlation matrix between roentgenographic parameters and the subfusion angle 3 months postoperatively and in the last follow-up, in 20 operated patients.

Parameters	Subfusion lordosis 3 months postoperatively	Subfusion lordosis in the last follow-up
C2-C7 lordosis	r = 0.705,  = 0.0022	r = 0.816,  = 0.0001
SCA	r = −0.333,  = 0.208	r = −0.083,  = 0.761
T1-slope	r = −0.325,  = 0.219	r = −0.521,  = 0.038
C2-C7 SVA	r = 0.369,  = 0.160	r = 0.174,  = 0.519
NT	r = −0.341,  = 0.197	r = −0.070,  = 0.797
TIA	r = −0.495,  = 0.122	r = −0.364,  = 0.271
CT	r = −0.698,  = 0.016	r = −0.693,  = 0.018
CrT	r = 0.223,  = 0.406	r = 0.050,  = 0.854
C0-C2 angle	r = 0.78,  = 0.019	r = 0.559,  = 0.024

The results in bold present statistical significance with ; SCA: spinocranial angle; NT: neck tilt; TIA: thorax inlet angle; CT: cervical tilt; CrT: cranial tilt; r = Pearson correlation coefficient; P = probability value.