Effects of Linear-Polarized Near-Infrared Light Irradiation on Chronic Pain

Table 3

Means of differences between pre- and immediately post-therapy.

Group	Differences (treatment effects) (mean ± SE)
I	6.23±0.45
II	4.92±0.42 *

* 𝑃<0.05 as compared with Group I; SE: standard error.