Prior hypersensitivity reaction characteristics
| Characteristic | n=186 |
| Prior HSR grade, n (%) | |
| 1 | 8 (4%) |
| 2 | 67 (36%) |
| 3 | 73 (39%) |
| 4 | 19 (10%) |
| Unknown | 19 (10%) |
| Prior HSR symptoms and signs, n (%) | |
| Erythema | 71 (38%) |
| Urticaria | 57 (31%) |
| Flushing | 49 (26%) |
| Pruritus | 45 (24%) |
| Dyspnea | 39 (21%) |
| Prior epinephrine use, n (%) | 19 (10%) |
HSR, hypersensitivity reaction.