Cluster Cluster 1 (50 patients) Cluster 2 (49 patients) Cluster 3 (30 patients)
Sex F F M
Age Any age Younger Older
History of Atopy Yes Does not affect No
Radiological Explorations most involved Urography CT Vascular Exploration
Involved ICM Uknown Iohexol Iodixanol
Previous Contact to ICM No Yes Yes
Type of reaction Anaphylaxis (I) Cutaneous (I or D) Cutaneous (D)
Delay until allergy study Long Short Short
Probability of Positive ST Low Low Higher
Renal Risk Low Low High