Table 4. Hazard ratio estimates for factors associated with disengagement by race.

	Model for White participants (n=27,588)		Model for Black participants (n=4161)
	Hazard ratio (95% Confidence interval)	p-value	Hazard ratio (95% Confidence interval	p-value
DEMOGRAPHICS
Age
50-54 years			1.58 (1.31, 1.89)	<.0001
55-59 years	1.07 (0.98, 1.16)	0.1494	1.41 (1.15, 1.73)	0.0012
60-64 years	0.94 (0.86, 1.04)	0.2273	1.04 (0.84, 1.28)	0.7426
65 years and older	1.00 (reference)		1.00 (reference)
Hispanic ethnicity vs. not	1.83 (1.34, 2.50)	0.0001	1.37 (0.82, 2.28)	0.2332
Living alone vs. not	1.35 (1.20, 1.50)	<.0001	1.27 (1.12, 1.45)	0.0003
College degree vs. not	0.81 (0.75, 0.88)	<.0001	0.88 (0.75, 1.03)	0.1150
COMORBIDITIES
Family history of prostate cancer	0.91 (0.84, 0.99)	0.0302	0.76 (0.64, 0.90)	0.0017
Current smoker vs. former or never smoker	1.51 (1.33, 1.71)	<.0001	1.47 (1.27, 1.70)	<.0001
WHY PARTICIPATING IN SELECT
"It makes me proud to be part of a study” vs. not	0.85 (0.79, 0.91)	<.0001	1.03 (0.91, 1.16)	0.6619
“It may help others in the future” vs. not	0.84 (0.74, 0.94)	0.0035	0.90 (0.78, 1.03)	0.1276
“My wife or others in my family want me to join” vs. not	1.00 (0.90, 1.11)	0.9417	0.76 (0.63, 0.92)	0.0040
SITE CHARACTERISTICS
Received an R&A grant vs. not	0.66 (0.45, 0.97)	0.0355	0.76 (0.57, 1.00)	0.0532
Number of training meetings missed
5 or more	1.92 (1.38, 2.67)	0.0001	2.00 (1.20, 3.35)	0.0079
3 or 4	1.40 (0.94, 2.08)	0.0954	1.74 (1.17, 2.57)	0.0056
0, 1 or 2	1.00 (reference)		1.00 (reference)
Type of site
CCOP	0.67 (0.52, 0.86)	0.0014	0.70 (0.51, 0.96)	0.0277
VA	1.99 (1.26, 3.15)	0.0032	0.87 (0.65, 1.16)	0.3523
Other	1.00 (reference)		1.00 (reference)

Covariates are adjusted for all other covariates presented in the table.

Abbreviations: R&A = Retention and Adherence. CCOP=Community Clinical Oncology Program. VA=Veterans Affairs