Table 5 Multiple linear regression analysis

Criterion variable	Predictor variables	Regression coefficient (B)	Standardized coefficient (β)	Significance (p)	VIF	Adjusted R ²
Moderate neck disability
VAFS24	PCS	0.84	0.44	0.004	1.00	0.17
VAS24	HIT-6	0.93	0.48	0.001	1.00	0.22
MMO24	NDI	−0.35	−0.40	0.01	1.12	0.14
Mild neck disability
VAFS24	PCS	0.98	0.38	0.013	1.00	0.12
VAS24	PCS	0.67	0.40	0.009	1.00	0.14
MMO24	NDI	−0.53	−0.49	0.001	1.00	0.21

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, 24 24 hours after of tests.

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