From:  Management of Netherton syndrome and hereditary angioedema with concurrent biologic therapy: a case report

 Monthly frequency of angioedema attacks from 2016 to present.

Observation periodT0T1T2Difference between T0 and T1 (%)Difference between T0 and T2 (%)
Frequency of attacks (per month)6.504.000.7538.5088.50

Attack rates are shown across three clinical management phases: T0 (2016–September 2019, no prophylaxis), T1 (September 2019–April 2021, long-term prophylaxis with plasma-derived C1-INH), and T2 (April 2021–present, long-term prophylaxis with lanadelumab). Variations were −38.50% from T0 to T1 and −88.50% from T0 to T2. Data before T2 were retrospectively collected from the patient’s clinical history and medical records. C1-INH: C1 inhibitor.