Table 1.

Demographic Information

Group/Diagnosis	N	Median Age (yr) (range)	No. of Females	No. of Males
All patients	123	12.1 (0.6-75.7)	67	56
<18 yr	75	7.2 (0.6-17.9)	34	41
<6 yr	31	2.2 (0.6-5.6)	14	17
A	63	11.3 (1.1-69.1)	34	29
Idiopathic	22	28.5 (2.1-69.1)	16	6
Cyclic	10	10.7 (2.5-47.2)	5	5
Congenital*	31	7.7 (1.1-32.9)	13	18
Kostmann’s syndrome	20	7.6 (1.1-19.1)	7	13
B	60	14.0 (0.6-75.7)	33	27
Idiopathic	20	30.8 (1.3-75.7)	12	8
Cyclic	11	27.4 (10.5-59.1)	8	3
Congenital*	29	8.0 (0.6-33.8)	13	16
Kostmann’s syndrome	16	5.3 (0.6-33.8)	6	10

^*Congenital neutropenia includes patients with Shwachmann-Diamond syndrome (3). myelokathexis (4). glycogen storage disease type lb (1). possible autoimmune neutropenia (1), and neutropenia with dysgammaglobulinemia (1).