Table 2.

Mean DNA base lesion concentrations with P values for differences between histologically normal prostates from men ages 16–27 and men ages 55–66

Base lesion	Younger normal (n = 8)		Older normal (n = 11)		P value
	Mean	Variance	Mean	Variance	Mean*	Variance†
8-OH-Gua/105 Gua	233	1,087	310	12,251	0.05	0.02
FapyGua/105 Gua	58	271	101	1,584	<0.01	0.02
8-OH-Ade/105 Ade	73	226	118	2,305	0.01	0.05
FapyAde/105 Ade	40	135	43	165	0.58	0.98

The data for the 36- and 80-year-olds were not used in these groups because the base lesion concentrations were >3 SDs from the mean. 

^*t test. 

^† Levene test.