Table 2.

Bivariate correlations between the lumbar IMAT infiltration and gender, age, physical activity, NPRS mean, disc degeneration and fear-avoidance beliefs

		LMM IMAT	ES IMAT
Gender	r pb	−0.103	0.088
	p	0.630	0.683
Age	r	0.678	0.472
	p	< 0.001	0.020
Physical activity	r	−0.205	−0.350
	p	0.337	0.094
NPRS mean	r	0.075	−0.188
	p	0.728	0.379
Disc degeneration L4-L5	r	0.515	0.480
	p	0.010	0.018
Disc degeneration L5-S1	r	0.477	0.336
	p	0.018	0.109
FABQ-PA	r	0.228	0.484
	p	0.284	0.017

Abbreviations: NPRS Numeric Pain Rating Scale, FABQ-PA Fear-Avoidance Beliefs Questionnaire subdomain Physical Activity, IMAT intramuscular adipose tissue, LMM Lumbar Multifidus, ES Erector Spinae

r_pb = Point biserial coefficient