. 2018 May 1;12:657–666. doi: 10.2147/PPA.S162702

Table 3.

Regression model for SF-12 total in each neck pain group

Criterion variable: SF-12
Group
CNP	Overall model
	R² = 0.5, adjusted R² = 0.489, F = 44.943
	Predictor variables	Regression coefficient (B)	Standardized coefficient (β)	P-value	VIF
	NDI	−2.343	−0.707	<0.001^**	1.00
	Excluded variables
	BECK	–	−0.188	0.186	1.806
	STAI	–	−0.019	0.861	1.064
	VAS	–	−0.038	0.728	1.021
WHIP	Overall model
	R² = 0.33, adjusted R² = 0.317, F = 25.145
	Predictor variables	Regression coefficient (B)	Standardized coefficient (β)	P-value	VIF
	BECK	−1.182	−0.236	<0.001^**	1.00
	Excluded variables
	NDI	–	−0.226	0.096	1.396
	STAI	–	−0.184	0.108	1.00
	VAS	–	0.97	0.426	1.098
NP-HP	Overall model
	R² = 0.781, adjusted R² = 0.751, F = 26.187
	Predictor variables	Regression coefficient (B)	Standardized coefficient (β)	P-value	VIF
	BECK	−1.758	−0.907	<0.001^**	1.084
	STAI	−0.85	−0.253	0.02^*	1.017
	VAS	0.321	0.243	0.028^*	1.077
	Excluded variables
	NDI	–	0.118	0.366	1.633
NP-TMD	Overall model
	R² = 0.505, adjusted R² = 0.484, F = 23.495
	Predictor variables	Regression coefficient (B)	Standardized coefficient (β)	P-value	VIF
	NDI	−2.573	−0.711	<0.001^**	1.00
	Excluded variables
	BECK	–	-0.158	0.302	1.048
	STAI	–	0.238	0.108	1.012
	VAS	–	-0.130	0.462	1.375

Notes:

P < 0.05;

^**

P < 0.01.

Abbreviations: VIF, variance inflation factor; CNP, chronic neck pain; WHIP, neck pain associated with acute whiplash; NP-PH, neck pain associated with chronic primary headache; NP-TMD, neck pain associated with temporomandibular dysfunction; NDI, Neck Disability Index; VAS, visual analog scale; BECK, Beck Depression Inventory; STAI, State-Trait Anxiety Inventory; SF-12, Short Form-12 Health Survey.