Study Cohort Characteristics
| Characteristic | n = 245 |
| Mean age ± SD (y) | 33 ± 10.5 |
| Male | 141/245 (57.5%) |
| Hemoglobin type | |
| Sickle S | 182 (74.3%) |
| Sickle C | 40 (16.3%) |
| S-β-Thalassemia | 21 (8.6%) |
| Sickle, other* | 2 (0.8%) |
| Patient location | |
| Emergency department | 60/245 (24.5%) |
| Inpatient | 104/245 (42.4%) |
| Unknown | 81/245 (33%) |
↵* 1 patient with HgSE, 1 patient with HgS-O Arab.