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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