Masticatory sensory-motor changes after an experimental chewing test influenced by pain catastrophizing and neck-pain-related disability in patients with headache attributed to temporomandibular disorders

Table 4 Pearson’s correlation coefficient between the different variables analyzed in the study

Groups		VAS 6 min	VAS 24 h	VAFS 6 min	VAFS 24 h	MMO immediately after	MMO 24 h
Moderate neck disability	NDI	0.49**	0.28	0.40**	0.07	−0.54**	−0.40**
Mild neck disability		0.02	0.37*	0.02	0.21	−0.48**	−0.49**
Moderate neck disability	PCS	0.10	0.24	0.17	0.44**	0.03	0.04
Mild neck disability		0.08	0.40**	0.01	0.38*	−0.17	−0.09
Moderate neck disability	HIT-6	0.41**	0.48**	0.27	0.07	−0.12	−0.31*
Mild neck disability		−0.11	−0.03	0.30	−0.04	−0.13	−0.12
Moderate neck disability	VAS	−0.08	0.39*	0.49**	0.16	−0.23	−0.25
Mild neck disability		−0.08	0.17	−0.17	0.11	−0.39*	−0.47**

**p < 0.01; *p < 0.05.
Abbreviations: NDI neck disability index, PCS pain catastrophizing scale, HIT-6 headache impact test-6, VAS visual analog scale, VAFS visual analog fatigue scale, MMO maximal mouth opening.

ISSN: 1129-2377