Volume 48 | Number 5 | October 2013

Abstract List

Rachel A. Freedman M.D., M.P.H., Yulei He Ph.D., Eric P. Winer, Nancy L. Keating M.D., M.P.H.


To examine whether hospitals where patients obtain care explain racial/ethnic differences in treatment delay.

Data Source

Surveillance, Epidemiology, and End Results data linked with Medicare claims.

Study Design

We examined delays in adjuvant chemotherapy or radiation for women diagnosed with stage I–III breast cancer during 1992–2007. We used multivariable logistic regression to assess the probability of delay by race/ethnicity and included hospital fixed effects to assess whether hospitals explained disparities.

Principal Findings

Among 54,592 women, black (11.9 percent) and Hispanic (9.9 percent) women had more delays than whites (7.8 percent,  < .0001). After adjustment, black (vs. white) women had higher odds of delay (odds ratio = 1.25, 95 percent confidence interval = 1.10–1.42), attenuated somewhat by including hospital fixed effects ( = 1.17, 95 percent  = 1.02–1.33).


Hospitals are the important contributors to racial disparities in treatment delay.