Table 1 Characteristics of the patients
| Patients with an acute episode of anaphylaxis (n = 49) | |
|---|---|
| Sex, n (%) |
24 female (49.0) 25 male (51.0) |
| Age years, average (range) | 50 (19–82) |
| Trigger, n (%) | |
| Hymenoptera venom | 26 (53.1) |
| Medication | 14 (28.6) |
| Food | 5 (10.2) |
| Other | 4 (8.2) |
| Time from the onset of anaphylactic symptoms to sample collection at presentation to the emergency department, median (IQR) in minutes | 100 (69) |
| Convalescent sampling after anaphylactic episode, median (IQR) in days | 80 (93) |
| Emergency treatment, n (%) | |
| Epinephrine | 25 (51.0) |
| Corticosteroids | 43 (87.8) |
| Grade of reaction, n (%) | |
| Mueller I | 6 (12.2) |
| Mueller II | 6 (14.6) |
| Mueller III | 16 (32.7) |
| Mueller IV | 21 (42.9) |
| Symptoms, n (%) | |
| Any skin feature | 44 (89.8) |
| Any gastrointestinal feature | 15 (30.6) |
| Any respiratory feature | 26 (53.1) |
| Hypoxemia (SpO2 ≤ 92%) | 7 (14.3) |
| Any cardiovascular feature | 24 (49.0) |
| Hypotension (SBP < 90 mmHg) | 19 (38.8) |
| Acute tryptase > 11.4 µg/l, n (%) | 32 (65.3) |