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Criteria used by providers to start hydroxyurea
| Criteria | Proportion (%) |
|---|---|
| Acute Chest Syndrome | 88 |
| ≥3 painful episodes/year | 86 |
| Requiring hospitalization only | 42 |
| At home or requiring hospitalization | 44 |
| Chronic pain requiring frequent narcotic use | 70 |
| Priapism | 48 |
| Pulmonary Hypertension | 43 |
| Symptomatic Anemia | 40 |
| Stroke | 36 |
| Renal Failure | 15 |
| Ankle Ulcers | 12 |
| Low hemoglobin F levels | 9 |
| Elevated white cell count without evidence of infection | 6 |
