Table 3 Means (SDs within parenthesis) for weekly total headache activity (headache sum), number of headache days, intensity and duration for the 3-week diary recording period by student sex, grade, school location and assessment point

8.5 (10.1)

2.5 (2.1)

1.7 (0.7)

1.6 (0.6)

6.8 (8.7)

2.0 (1.9)

1.7 (0.7)

1.6 (0.7)

10.3 (11.2)

3.0 (2.1)

1.8 (0.7)

1.6 (0.6)

6.9 (7.8)

2.2 (1.9)

1.7 (0.6)

1.5 (0.6)

9.9 (12.2)

2.5 (2.2)

1.9 (0.8)

1.7 (0.6)

7.4 (9.0)

2.4 (2.2)

1.8 (0.8)

1.6 (0.7)

9.1 (11.8)

2.6 (2.0)

1.6 (0.5)

1.7 (0.7)

9.5 (7.5)

3.2 (1.8)

1.6 (0.4)

1.7 (0.5)

8.8 (9.8)

2.8 (2.1)

1.6 (0.5)

1.6 (0.6)

8.0 (10.6)

2.0 (1.9)

1.9 (0.8)

1.7 (0.7)

8.7 (12.2)

2.6 (2.4)

1.6 (0.6)

1.6 (0.7)

8.2 (11.6)

2.4 (2.3)

1.7 (0.7)

1.6 (0.8)

8.4 (12.2)

2.4 (2.4)

1.7 (0.8)

1.7 (0.8)