Relationship between Cervical Spine and Skeletal Class II in Subjects with and without Temporomandibular Disorders

Table 9

Pearson’s and Spearman’s correlation analysis between craniocervical angle and ANB scores.

TMD	Pearson’s correlation index	Student’s t test ()	Spearman’s correlation index	Student’s t test ()
Absent	−0.085 (L)	−0.475 (NS)	−0.169 (L)	−0.954 (NS)
Present	−0.547 (M)	−3.198 (S)	−0.212 (L)	NS according to critical values table for the nonparametric test

L: low correlation; M: moderate correlation; NS: nonsignificant. Student’s t test is used for the evaluation of significance, with a value <0.005.