Table 1. Type of sickle cell crisis and procedures performed.

Type of sickle cell crisis (ICD-9-CM Code)	N (%)
Sickle-cell thalassemia with crisis (282.42)	1029 (4.2%)
Hb-SS disease with crisis (282.62)	20814 (84.3%)
Sickle-cell/HB-C disease with crisis (282.64)	629 (2.5%)
Other sickle-cell disease with crisis (282.69)	2415 (9.8%)
Procedures (ICD-9-CM procedure code)
Continuous invasive mechanical ventilation for less than 96 consecutive hours (96.71)	665 (2.7%)
Continuous invasive mechanical ventilation for 96 consecutive hours or more (96.72)	468 (1.9%)
Exchange transfusion (99.01)	1489 (6%)

(N = 24699).