Table 1.

Partial correlations^* between erythrocyte metals and proteasomal CT-like activity in prostate cancer cases and controls

	Cases n=61					Controls n=61
r p-value	As	Cd	Cu	Pb	Zn	As	Cd	Cu	Pb	Zn
As	1.0	.486	−.061	.264	.350	1.0	.013	.220	.031	.125
		<.001	.65	.04	.006		.92	.10	.81	.34
Cd			−.104	.53	.029			−.044	.130	−.057
			.43	<.001	.83			.74	.32	.66
Cu				−.19	.027				−.008	.122
				.16	.84				.95	.36
Pb					−.012					−.139
					.93					.29
Zn					1.0					1.0
CT-like	−.016	−.10	.20	−.026	−.05	−.082	−.182	−.38	.29	−.018
activity	.90	.44	.13	.84	.68	.54	.17	.003	.026	.89

Abbreviations: Arsenic, As; Cadmium, Cd; Copper, Cu; Lead, Pb; Zinc, Zn; Chymotrypsin-like, CT-like.

^*Metal-metal Pearson correlations controlled for race. Metal-proteasome activity correlations controlled for race and CT-batch.

Significance level p < 0.05.