Table 3 Duration and intensity of headache yesterday and its effect on participation

Duration (hours)

mean±SEM, median

9.1±0.5, 4.0

8.9±1.0, 4.0

9.2±0.5, 4.0

p = 0.81

Intensity

p = 0.74

mild (n)

124

33

91

moderate (n)

231

53

178

severe (n)

55

13

42

mean*

1.8

1.8

1.8

What done

p = 0.10

everything (n)

167

45

122

more than half (n)

100

21

79

less than half (n)

100

18

82

nothing (n)

42

15

27