Severity
The mean severity of the abdominal attacks was higher than in other clusters. Additionally, significant differences were found between the abdominal and three other clusters (urogenital, facial, oropharyngeal), and between the extremities to other clusters.
Limitation
The differences between the five clusters in the patient’s perceived degree of limitation follow a similar pattern. Significant differences were found between the limitation casused by abdominal attacks and other clusters, the extremities and other clusters, and between facial to the other clusters. The limitation caused by oropharyngeal attacks was evaluated as very significant as compared to the abdominal and the extremities.