Table 2. Association of PhIP-DNA Adduct Levels with Prostate Cancer.

Sample  PhIP-DNA Adduct Level	ORa	95% CI	P value
Whole Sample (n=534 case-control pairs)
2nd Quartile	1.20	0.83-1.72	0.34
3rd Quartile	1.29	0.87-1.92	0.20
4th Quartile	1.25	0.76-2.07	0.38
Trend Test			0.36
High PhIP levela	1.16	0.84-1.59	0.37
African Americans (n=213 case-control pairs)
2nd Quartile	1.32	0.75-2.32	0.33
3rd Quartile	0.96	0.49-1.86	0.90
4th Quartile	0.73	0.32-1.63	0.44
Trend Test			0.35
High PhIP levela	0.76	0.44-1.32	0.33
Whites (n= 321 case-control pairs)
2nd Quartile	1.12	0.69-1.81	0.65
3rd Quartile	1.48	0.90-2.44	0.13
4th Quartile	1.73	0.89-2.34	0.10
Trend Test			0.07
High PhIP levela	1.44	0.97-2.14	0.07

^aall risk estimates use lowest level as referent group

^babove median level in controls