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Table 2 Comparisons between median (IQR) of Numericpain rating scale and Roland-Morris Disability Questionnaire for groups A and B before and after treatment

From: Effectiveness of polarized polychromatic light therapy on myofascial trigger points in chronic non-specific low back pain: a single blinded randomized controlled trial

Variable

Group

Baseline value median (IQR)

Post-intervention median (IQR)

p (inter-group)

NPRS

Group A

7 (5)

2 (2)**

.002*

Group B

7 (3)

4 (3.5)**

RMDQ

Group A

18 (14)

5 (7)**

.055

Group B

14 (11)

8 (8)**

  1. *Significantly different between group A and group B at p < 0.01, **Significantly different between pre- and post-intervention within each group at p <  0.01, IQR inter quartile range, Group A linear polarized polychromatic light therapy, Group B sham linear polarized polychromatic light therapy, NPRS Numeric Pain Rating Scale, RMDQ Roland-Morris Disability Questionnaire