Effectiveness of Low-Level Laser Therapy in Patients with Discogenic Lumbar Radiculopathy: A Double-Blind Randomized Controlled Trial

Table 4

Correlation analysis among pain intensity, functional disability, and lumbar ROM outcomes of both groups.

Both groups	Pain intensity			Functional disability			Lumbar flexion			Lumbar extension
Outcomes	r	Sig. (two-tailed)	R-squared linear	r	Sig. (two-tailed)	R-squared linear	r	Sig. (two-tailed)	R-squared linear	r	Sig. (two-tailed)	R-squared linear
Pain intensity	1			0.26	0.006	0.067	−0.423	0.000	0.179	−0.422	0.00	0.178
Functional disability	0.26	0.006	0.067	1			−0.247	0.009	0.061	−0.571	0.00	0.326

Pearson correlation coefficient: r < 0.4, weak or no relationship; 0.5 < r < 0.7, moderate relationship; and r > 0.7, strong relationship.