Table 4.

Comparison of clinical characteristics for JMML patients with and without c-Cbl mutation

Variable	With c-Cbl mutation, n = 5	Without c-Cbl mutation, n = 44	P
Median age at diagnosis, mo (range)	12 (8-15)	29 (1-75)	.037
Median HbF, % (range)	3.5 (2.0-7.6)	24.9 (1.0-62.0)	.02

Other variables studied (sex, hemoglobin level, white blood cell count, platelet count, monocyte percentage in peripheral blood, and metaphase cytogenetic abnormalities) do not show statistical significance.

HbF indicates hemoglobin F.