. Author manuscript; available in PMC: 2010 Jun 4.

Published in final edited form as: J Am Stat Assoc. 2008 Dec 1;103(484):1392–1404. doi: 10.1198/016214508000000706

Table 5.

Characteristics of participants with prostate cancer who had a prostatectomy

	No Prostatectomy (N=1484)	Prostatectomy (N=531)	P-value^a
Finasteride Arm	596 (40.2%)	225 (42.4%)	0.42
Baseline PSA	1.5 (0.9, 2.1)^b	1.6 (1.0, 2.3)	0.002
Baseline Age	65 (60, 69)	61 (58, 64)	< 0.0001
Race			0.10
White	1372 (92.5%)	496 (93.4%)
African American	79 (5.3%)	18 (3.3%)
Other	33 (2.2%)	17 (3.2%)
Family History of Prostate Cancer	312 (21.0%)	122 (22.9%)	0.38
Referred to Biopsy because of PSA	336 (22.6%)	171 (32.2%)	< 0.0001
Referred to Biopsy because of DRE	265 (17.9%)	139 (26.2%)	< 0.0001
Prior Negative Biopsy	205 (13.8%)	68 (12.8%)	0.61
High Grade Cancer from Biopsy	395 (26.6%)	168 (31.6%)	0.03

Chi-square test for categorical variables, Wilcoxon rank sum test for continuous covariates (baseline PSA and age).

Median (1st quartile, 3rd quartile) reported for continuous covariates.