Table 3.

Differential expression of EPHB6, EFNB2, EFNB3, and TrkA in NB subsets defined by age at diagnosis or tumor stage

Variable	Age at diagnosis			Tumor stage
	<1 year (n = 17) Median	>1 year (n = 33) Median	P	1, 2, 4S (n = 23) Median	3, 4 (n = 27) Median	P
EPHB6	0.81	0.69	0.1546	0.90	0.52	0.0004
EFNB2	2.01	1.38	0.0022	2.01	1.31	0.0003
EFNB3	0.65	0.46	0.3621	0.77	0.43	0.0216
TrkA	2.18	1.09	0.0001	1.79	0.91	0.0005

The Wilcoxon rank-sum test was used to assess differential expression of EPHB6, EFNB2, EFNB3, and TrkA in subsets of NB indicated.