Table 2.

Multilevel cox proportional hazards model for the associations of census tract residential racial composition, participant race, and breast cancer specific mortality

	Baseline/crudea			Partially adjustedb			Full modelc
	HR	95% CI		HR	95% CI		HR	95% CI
Percent Blackd	1.07	1.05	1.08				1.03	1.00	1.05
Race (1 = Black, 0 = White)	1.51	1.35	1.69	1.35	1.20	1.53	1.22	1.06	1.42
Log (poverty rate)	1.23	1.15	1.32	1.15	1.07	1.24	1.10	1.01	1.20

HR hazard ratio, CI confidence interval

^aBaseline/crude models for each predictor are the independent association with mortality controlling only for age, age-squared, cancer stage at diagnosis, and surgery status

^bThe partially adjusted model includes both race and the log of tract poverty rate as well as age, age-squared, cancer stage at diagnosis, and surgery status

^cThe full model adds tract percent Black to the partially adjusted model

^dTract percent Black is transformed such that a one-unit change is equivalent to a 10% change in tract proportion Black