Table 3. Correlations among CRA, CVA, CRA+CVA, and cervical ROM during flexion and extension

Variables		CRA (°)	CVA (°)	CRA+CVA (°)	Cervical ROM (°)
Flexion	CRA	1.00	–0.13	0.35	0.31
	CVA	–0.13	1.00	0.88**	0.86**
	CRA+CVA	0.35	0.88**	1.00	0.96**
	Cervical ROM	0.31	0.86**	0.96**	1.00
Extension	CRA	1.00	0.09	0.74**	0.54*
	CVA	0.09	1.00	0.73**	0.71**
	CRA+CVA	0.74	0.73	1.00	0.85**
	Cervical ROM	0.54*	0.71*	0.85**	1.00

CRA, cranial rotation angle; CVA, cranial vertical angle; ROM, range of motion; SD, standard deviation.
p<0.05,
p<0.01.