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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
  Boys Girls   
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)
  1. 25th and 75th percentiles are shown in parentheses.