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Table 6 Trend of the headache days by change in the number of the headache preventative medications

From: OnabotulinumtoxinA in chronic migraine: is the response dose dependent?

 

Number of the headache days

Number of the severe headache days

Patients who were on the same number of the preventative medications (n = 146)

Baseline

25.94 ± 5.77

15.54 ± 8.04

36 weeks before the increase

13.55 ± 11.04

5.66 ± 6.97

24 weeks before the increase

12.67 ± 10.78

5.19 ± 6.86

12 weeks before the increase

13.04 ± 10.73

5.00 ± 6.46

Day of increase to 200 units

12.81 ± 10.66

5.42 ± 6.26

12 weeks after the increase

10.85 ± 10.36 **

3.77 ± 4.71 ***

24 weeks after the increase

11.70 ± 10.45

3.59 ± 4.73 ***

36 weeks after the increase

10.36 ± 10.46 **

3.70 ± 4.73 ***

Patients who were on different number of the preventative medications (n = 29)

Baseline

25.41 ± 5.56

13.52 ± 7.44

36 weeks before the increase

17.55 ± 9.02

7.00 ± 5.85

24 weeks before the increase

18.17 ± 10.51

6.83 ± 6.08

12 weeks before the increase

17.07 ± 9.89

6.90 ± 6.49

Day of increase to 200 units

17.69 ± 10.69

8.21 ± 8.47

12 weeks after the increase

17.07 ± 10.12

7.17 ± 6.74

24 weeks after the increase

15.79 ± 11.42

5.00 ± 5.96 *

36 weeks after the increase

14.34 ± 10.92 *

5.55 ± 5.43 *

  1. Data presented as mean ± SD; * P < 0.05, ** P < 0.01, *** P < 0.001 for the paired t-test compared to the day of increase to 200 units