Functionality
The mean in affected functionality was higher in the abdominal attacks as compared to the other clusters. Additionally, significant differences were found between the abdominal and the three other clusters (urogenital, facial, oropharyngeal) and between the extremities to the other clusters. In particular, paired tests showed a difference between the abdomen and extremities and other 3 clusters.
As a rule, attacks experienced in the abdomen were consistently perceived as extremely challenging for the study subjects. The intensity of pain in the attacks was very high and reached a level of 7-8 on a scale of 0-10 (Fig 2). The standard deviations in dimensions of the attacks were relatively small, which indicates a consistency in individual observations across all the clusters.