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| Reasons parameters | Overall |
| (n=103) | |
| N (%) | |
| Vaso-occlusive crisis | 94 (91.3%) |
| Acute chest syndrome | 32 (31.1%) |
| Hemolytic crisis | 27 (26.2%) |
| Splenomegaly | 16 (15.5%) |
| Hip avascular necrosis | 9 (8.7%) |
| Hypersplenism | 8 (7.8%) |
| Splenic sequestration crisis | 8 (7.8%) |
| Gall stones | 7 (6.8%) |
| Pneumonia | 7 (6.8%) |
