Table 1.

Clinical characteristics with respect to gene expression profile classification

Variable (Mean ± Standard Deviation)	Class 1 (n=83)	Class 2 (n=55)	Class 1 versus Class 2 (P-Value)
Age at Diagnosis (yrs)	60.9 ± 13.4	68.1 ± 12.5	0.002
Sex:
Female	36	32	0.1
Male	47	23
Initial Tumor Largest Diameter (mm)	13.0 ± 2.9	14.1 ± 2.7	0.02
Initial Tumor Thickness (mm)	5.2 ± 2.2	6.1 ± 2.7	0.047
Tumor thickness at 3 months post-treatment (mm)	3.9 ± 1.9	5.0 ± 2.3	0.002
Absolute decrease in tumor thickness at 3 months post-treatment (mm)	1.4 ± 1.4	1.2 ± 1.7	0.6
Percent reduction in tumor thickness at 3 months post-treatment	26.5 ± 27.2	16.7 ± 24.6	0.03