Table 5.

Significant factors identified by the linear regression analyses.

Factor		Unstandardized beta	SE	Standardized beta	t	P value
Healthy
	(Constant)	301.32	10.20	—	7.50	<.001
	Erector spinae MPFa	140.21	45.17	.45	3.10	.01
	Biceps femoris MPF	130.24	44.74	.40	2.91	.01
	Trunk mass	−1.12	0.49	−.32	−2.30	.03
Low back pain
	(Constant)	342.21	61.68	—	5.55	<.001
	Trunk mass	−2.08	0.48	−.67	−4.34	<.001
	Kinesiophobia	−3.56	1.27	−.43	−2.81	.01
	Self-efficacy	1.15	0.49	.35	2.34	.03

^aMPF: median power frequency.