Table 1 Demographical data of and the circumstances of establishing the diagnosis in the study population.
From: Pediatric hereditary angioedema due to C1-inhibitor deficiency
|  | N° of patients | Age (median) at diagnosis | Age at the onset of symptoms | |
|---|---|---|---|---|
| Â | Boys | Girls | Â | Â |
Symptom-free, identified by family screening (53%) | 13 | 13 | 5 (3-11) | 6 (4-12) |
Symptomatic, identified by family screening undertaken after either parent had been diagnosed with HAE-C1-INH (26%) | 7 | 6 | 7 (5-12) | 5 (3-10) |
Diagnosis established by clinical manifestations (21%) | 3 | 7 | 9 (4-11) | 3 (1-7) |