Mortality rate after cancer surgery drops, but gap persists between Black and white patients

Mortality rates after cancer surgery declined for Black as well as white patients during a recent ten-year period, although the mortality gap between the two groups did not narrow, according to new research by Dana-Farber Cancer Institute, Brigham and Women's Hospital, and Harvard University investigators.

The findings, published online today by JAMA Network Open, present a mixed picture for healthcare policymakers: While postsurgical mortality rates have fallen for patients generally, more targeted efforts are needed to reduce disparities between Black and white patients undergoing such surgery, study authors say.

"Black Americans are likely to be diagnosed with more advanced cancer than whites and, historically, have had higher mortality rates following cancer surgery," says lead author Miranda Lam, MD, MBA, of Dana-Farber, Brigham and Women's Hospital, Harvard T.H. Chan School of Public Health, and Harvard Medical School. "Hospitals have put a variety of policies in place to improve surgical cancer care over the past 15 years. This study provided an opportunity to gauge the effects of those measures for patients in general and for Blacks and whites specifically."

Investigators used national Medicare data to examine the trends in mortality rates for the years 2007-2016 in Black and white patients who had undergone surgery for any of nine major types of cancer. (Racial group was determined by patients' self-identification in Medicare documentation.) The data covered 870,929 cancer operations in all.

The researchers found that national mortality trends following cancer surgery improved for Black and white patients by 0.12% and 0.14% per year, respectively. Because mortality rates for Blacks were higher to begin with than for whites, the equal decline in rates for both groups meant the gap between them did not shrink.

"The findings tell us that even though policies designed to improve cancer surgery outcomes are working better for all patients, none of them have been specific enough to close the gap in mortality between Blacks and whites," Lam remarks. "It's possible that part of the gap may be due to upstream and/or downstream issues from the surgery itself, such as late referrals which may lead to late presentation at time of surgery, fragmented follow-up after discharge, and limited resources in the community, and that different policies and interventions may be needed to address disparities in cancer surgery."

Credit: 
Dana-Farber Cancer Institute