Table 2 Headache diary rating scale

0 = No headache

1 = Very mild headache, only noticeable when attending to it

2 = Mild headache, could be ignored at times

3 = Moderate headache, normal activities can be continued

4 = Severe headache, difficult to concentrate, can manage undemanding tasks

5 = Extremely intense headache, incapacitated, cannot do anything