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Table 2 Comparation within-groups and differences group-by-time interaction for primary outcomes

From: Neck-specific strengthening exercise compared with placebo sham ultrasound in patients with migraine: a randomized controlled trial

  

Baseline

Final assessment

Baseline

Follow-up 1

Baseline

Follow-up 2

Baseline

Follow-up 3

Interaction group*time

  

Mean change (95%CI)

p value

Mean change (95%CI)

p value

Mean change (95%CI)

p value

Mean change (95%CI)

p value

F; df; p value

Primary outcomes

Groups

         

Frequency of headachea

IG

SUG

1.13 (-2.29; 4.57)

1.16 (-2.06; 4.38)

0.513

0.477

1.19 (-2.23; 4.62)

1.01 (-2.21; 4.23)

0.492

0.536

2.07 (-1.35; 5.51)

0.41 (-2.81; 3.63)

0.233

0.801

2.43 (-1.00; 5.86)

0.01 (-3.21; 3.23)

0.163

0.994

0.44; 4; 0.782

Intensity of pain (NRS)

IG

SUG

2.96 (2.03; 3.90)

3.73 (2.85; 4.62)

0.001*CR

0.001*CR

3.31 (2.38;4.25)

2.78 (1.90; 3.67)

0.001*CR

0.001*CR

3.96 (3.03; 4.90)

3.53 (2.65; 4.42)

0.001*CR

0.001*CR

4.02 (3.08;4.96)

3.38 (2.50; 4.27)

0.001*CR

0.001*CR

1.51; 4; 0.202

  1. 95%CI 95% confidence interval, IG intervention group, SUG sham ultrasound group, NRS numerical rating scale
  2. arepresented in days with headache per month
  3. *p < 0.005
  4. CRclinically relevant