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Table 7 Number of respondents from different regions of the world who find these causes of CSU as most common (n = 1098)a

From: Management of chronic spontaneous urticaria: a worldwide perspective

CSU causes

Geographical regions

Total

% (n/total)

NA

% (n/total)

LA

% (n/total)

EU

% (n/total)

AME

% (n/total)

AP

% (n/total)

Idiopathic CSU

97.5 (315/323)

80.6 (150/186)

88 (323/367)

93.3 (56/60)

89.5 (145/162)

90.1 (989/1098)

Type-I-allergy

27.5 (77/280)

27.1 (46/170)

17.9 (60/336)

19.6 (11/56)

39.6 (59/149)

25.5 (253/991)

Autoimmune CSU

64.4 (201/312)

44.8 (81/181)

46.8 (166/355)

32.8 (19/58)

54.1 (80/148)

51.9 (547/1054)

Systemic disorders

26.7 (79/296)

29.1 (50/172)

18.2 (62/340)

12.3 (7/57)

20.8 (31/149)

22.6 (229/1014)

Malignancy

2.4 (7/288)

6.1 (10/165)

6.6 (22/334)

0 (0/56)

3.6 (5/139)

4.5 (44/982)

Chronic infection

11.7 (34/290)

32.8 (58/177)

27.4 (95/347)

13.6 (8/59)

22.3 (33/148)

22.3 (228/1021)

Food intolerance

8.0 (23/289)

19.7 (35/178)

16.3 (56/343)

22.4 (13/58)

26.6 (41/154)

16.4 (168/1022)

  1. AME Africa/Middle-East, AP Asia-Pacific, EU Europe, LA Latin America, NA North America. athe respondents could choose more than one answer