Table 2. Significance of KIF14 and E2F3 mRNA expression levels compared to phenotype of tumors.

Phenotype	Significant variation in fold
	KIF14	E2F3
Age at diagnosis (median 24 months)	0.01*	0.67
Duration (median 1.5 months)	0.34	0.55
Laterality	0.04*	0.28
Differentiation	0.31	0.91
Familial	0.63	0.19
Invasion	0.81	0.51

*There was a statistical increase in KIF14 expression with older age at diagnosis (p=0.01) and in unilateral RB patients (p=0.04).