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Table 2 Comparison of the treated groups pre- and post-treatment and the control group for the evaluation and re-evaluation

From: Comparison of the effects of low-level laser and pulsed and continuous ultrasound on pain and physical disability in chronic non-specific low back pain: a randomized controlled clinical trial

Variables

Pulsed laser (n = 26)

Median (25–75%)

Pulsed ultrasound (n = 24)

Median (25–75%)

Continuous ultrasound (n = 26)

Median (25–75%)

Control (n = 24)

Median (25–75%)

p

Pain (VAS) (0–10 cm)

 Pre

5.7 (4.8–7)

6 (4.2–6.9)

5.9 (4.9–6,7)

6 (5–7)

0.791

 Post

0.5 (0.1–8) *+#

1.4 (0.8–3) *¥€

1.1 (0.4–7) +¥£

6.3 (5–7.2) #€£

0.001

 Difference between groups

4.8 (1.3) *

3.7 (2.0) +

3.7 (2.0) #

−0.2 (1.7) *+#

0.001

Pain (McGill – total) (0–67)

 Pre

23.5 (18–33)

28.5 (24–34.5)

24 (20–29)

24 (20–30.5)

0.213

 Post

9.5 (3–23) *

13.5 (2.5–24.5) +

12 (5–20) #

34 (16.5–42.5) *+#

0.005

 Difference between groups

10.76 (14.32) *

12.41 (14.52) +

11.03 (16.26) #

−26.54 (16.22) *+#

0.001

Sensory (0–34)

 Pre

13.5 (10–19)

16.5 (10–20)

15 (12–22)

15.5 (13–19)

0.84

 Post

6.5 (0–12) *

7 (2–15) +

9 (3–13) #

19 (10.5–23.5) *+#

0.002

 Difference between groups

6.1 (8.0)

6.0 (8.1)

7.1 (11.3) #

−0.5 (8.4) #

0.026

Affective (0–17)

 Pre

6 (4–7)

5 (4–6.5)

5 (3–8)

5 (3–6)

0.794

 Post

2 (0–6) *

2.5 (0–5.5) +

2 (1–5) #

7 (2–9.5) *+#

0.013

 Difference between groups

2.3 (3.8) *

2.2 (3.4) +

2.6 (4.2) #

−1.3 (4.2) *+#

0.003

Functional disability (0–24)

 Pre

4 (4–7)

6 (3–8.5)

4 (3–7)

4 (3–8)

0.83

 Post

1.5 (1–4) *

1 (0–4.5) +

2 (1–4) #

5.5 (3–8) *+#

0.001

 Difference between groups

2.9 (2.3) *

2.9 (2.8) +

2.4 (3.0) #

−0.04 (2.3) *+#

0.001

  1. * No statistically significant difference in Kruskal–Wallis non-parametric ANOVA for p < 0.05. Statistically different group from the others in the post hoc Dunn’s test (*p < 0.05; +p < 0.05; #p < 0.05; ¥p < 0.05; €p < 0.05; £p < 0.05)