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. 2014 Mar 28;9:44. doi: 10.1186/1750-1172-9-44

Table 4.

The distribution of the attacks induced by various trigger factors, by location

Trigger factor Subcutaneous episodes Abdominal episodes Upper airway episodes
Menstruation
11
21
6
Mental stress
35
12
6
Physical exertion
38
3
0
Weather changes
49
8
1
Infection
14
10
4
Mechanical trauma
5
0
0
Fatigue
15
1
0
Foodstuffs
0
7
0
Non-explorable trigger factor 67 52 0

The values presented in the table are percentages (%).