Table 2.

Correlation of T-cell density with age and prostate specific antigen (PSA) in matched race tissue microarrays and combined African-American set

Matched race tissue microarrays	CD3 Density			CD8 Density			FOXP3 Density
	N	r*	p	N	r*	p	N	r*	p
Overall
Age	224	−0.07	0.3	227	−0.10	0.1	227	−0.07	0.3
PSA	224	−0.02	0.8	227	−0.13	0.05	227	−0.01	0.9
European-American
Age	127	0.02	0.8	127	−0.08	0.3	127	0.004	0.9
PSA	127	−0.08	0.4	127	−0.13	0.2	127	0.0001	0.9
African-American
Age	97	−0.22	0.03	100	−0.15	0.1	100	−0.17	0.1
PSA	97	0.09	0.4	100	−0.09	0.4	100	0.01	0.9
Combined African American **
Overall
Age	181	−0.08	0.3	182	−0.08	0.3	185	−0.05	0.5
PSA	181	0.01	0.9	182	−0.03	0.7	185	−0.02	−.8

^*Spearman correlation coefficient

^**African-Americans from matched race tissue microarrays (above) and high grade African-American tissue microarray (see Supplementary Table S3)