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Table 2 Incidence of triggers in retrospective study N = 200

From: Trigger factors in childhood migraine: a clinic-based study from Eastern India

Trigger

n

%

A. Environmental/climatic

 1. Sunlight

188

94

 2. Hot and humid climate

188

94

 3. Cold (air conditioner)

2

0.5

 4. Noise

  (a) Environmental

156

78

  (b) Loud speakers/loud music

134

67

 5. Smoke

  (a) Auto emission

83

41

  (b) Cigarettes

7

3.5

 6. Crowded place

156

78

B. Visual stimuli

 1. School book reading

105

52.5

 2. Recreational reading

11

5.5

 3. Bright light (other than sun)

58

29

 4. TV watching

17

8.5

C. Stresses

 1. School stress

157

78.5

 2. Extracurricular activity related

37

18.5

 3. Family stress

29

14.5

 4. Bereavement

2

1

D. Physical exercise

27

13.5

E. Dietary

 1. Missing meals

63

31.5

 2. Religious fasting*

11

13.4

 3. Dark chocolate

3

1.5

 4. Pizza

2

1

 5. Chinese food

7

3.5

 6. Caffeinated drinks

0

0

F. Car/bus journeys (other than school)

33

16.5

G. Behavioral

 1. Shouting

29

14.5

 2. Being scolded

13

6.5

H. Hormonal

 1. Menstruation*

3

3.7

I. Others

(Perfumes, head trauma, GI upset)

9

4.5

J No trigger

12

12

  1. * In girls (n = 82; menstruating = 36)