Table 3.

Crude and adjusted models of Black race as an independent predictor of cancer grade on initial biopsy at the DVAMC, 2001–2009 with complete data for all variables (n = 887)

Cancer outcome: low grade (< 7)	Model 1: adjusted			Model 2: unadjusted
	RRR	95 % CI	p	RRR	95 % CI	p
Black racea	1.29	0.92–1.80	0.14	1.35	0.98–1.87	0.06
Age (years)	0.99	0.97–1.01	0.26
BMI (kg/m2), relative to < 25 kg/m2			0.02#
25–29.99	0.58	0.38–0.90
30–34.99	0.63	0.40–1.01
≥35	0.62	0.34–1.12
Total number of cores taken	0.92	0.86–0.99	0.02
Abnormal DRE	1.45	0.97–2.16	0.07
PSA (ng/ml)	1.37	1.04–1.80	0.02

Cancer outcome: high grade ( ≥ 7)	Model 1: adjusted			Model 2: unadjusted
	RRR	95 % CI	p	RRR	95 % CI	p
Black racea	1.84	1.28–2.66	0.001	1.82	1.32–2.50	< 0.001
Age (years)	1.01	0.99–1.04	0.30
BMI (kg/m2), relative to < 25 kg/m2
25–29.99	0.55	0.34–0.86	0.02#
30–34.99	0.53	0.32–0.88
≥35	0.77	0.42–1.41
Total number of cores taken	0.97	0.90–1.05	0.52
Abnormal DRE	3.41	2.29–5.07	< 0.001
PSA (ng/ml)	2.91	2.21–3.83	< 0.001

Statistical analysis: multinomial logistic regression for cancer grade on biopsy

Models adjusted for age, log-PSA, BMI, DRE, and total number of cores taken

RRR relative risk ratio for no cancer versus low grade versus high grade, CI confidence interval, p p value

^# Likelihood ratio test

^aReference group was white race