Table I.

Subject characteristics.

	Healthy controls	Cancer patients	p-value
Number	49	49	NS
Age, mean ± SD (years)	41.4±12.4	54.8±11.2	<0.0001a
Race			0.0116b
Caucasian (including Hispanic)	25 (51%)	39 (80%)
Black	11 (22%)	4 (8%)
Asian	13 (27%)	6 (12%)
Tobacco use	2	3	NS
Diabetes	2	2	NS
Hepatitis	0	2	NS
HIV	0	0	NS

^aWilcoxon test,

^bχ² test; NS, not significant.