Table 2.

Correlations between patient groups.

	NDI		PCS
	NP	CCFP	NP	CCFP
PCS	0.54∗∗	0.48∗	—	—
NDI	—	—	0.540∗∗	0.480∗
Flexion	−0.204	−0.382	−0.452∗	−0.219
Extension	−0.229	−0.145	−0.334	0.079
Lateroflexion	−0.327	−0.186	−0.507∗	0.168
Rotation	−0.256	−0.507∗	−0.386	−0.137
MMO	−0.117	0.194	0.122	−0.055

NDI, neck disability index; PCS, Pain Catastrophizing Scale; MMO, maximal mouth opening; NP, neck pain group; CCFP, cervico-craniofacial pain group.

  ^∗ P < 0.05.

  ^∗∗ P < 0.01.