Table 1.

Clinical and demographic characteristics of SCD patients.

	Alloimmunized	Non-alloimmunized	P value
	(N = 35)	(N = 40)
Age
Mean age ± SD	35.1 ± 14	30.9 ± 8.7	NS
Range	(21 y–73 y)	(20 y–58 y)
Gender
Male	14	17	NS
Female	21	23
RBC transfusion
<30 unit	25	25	NS
>30 unit	10	15
Hydroxyurea
Yes	11	17	NS
No	24	23