Table 2 Headache intensity presented as VAS (primary outcome)

-Post-intervention

-Headache-free 30 min

14/30

24/30

0.248

-Number of case percent

45.5%

62.5%

-Baseline VAS

7.7 (1.6)

7.9 (1.9)

0.703

-2 weeks VAS

3.69 (2.22)

2.49 (2.09)

0.001

-Mean reduction in VAS after 2 weeks

3.048 (2.60)

4.33 (1.9)

95% CI − 1.85 (− 2.83 to − 0.86)

-4 weeks VAS

4.44 (2.23)

3.79 (2.57)

0.020

-Mean reduction in VAS after 4 weeks

3.095 (2.70)

3.27 (2.36)

95% CI − 1.23 (− 2.26 to − 0.020)