Dr Mark Williams and his colleagues from Eli Lilly & Co. in Indianapolis, and Health Process Management, LLC, Pennsylvania used data from six US states to analyze all the hospitalizations in 1999 and estimate the incidence of severe sepsis in cancer patients across the US, and the mortality rate of patients suffering from both conditions.

Almost 5% of the cancer patients that were hospitalized in the six states were found to have severe sepsis. When extrapolated to the rest of the USA, this corresponds to around 126,000 cases every year.

The data also showed that hospitalized patients with cancer and severe sepsis were more than five times as likely to die than cancer patients not suffering from severe sepsis. 37.8% of patients with cancer and severe sepsis died in hospital in comparison to 7.2% of patients with cancer but no severe sepsis. This corresponds to the death of around 46,700 patients every year.

"Our study demonstrates the devastating complication of severe infections in cancer patients. Improvement in infection control, such as early appropriate antibiotics, in this population could have a significant impact on overall cancer survival," said Williams.

Cancer treatments and the presence of tumors can cause patients with cancer to become immunosuppressed. This hinders their ability to fight off infection, and makes them more at risk of severe sepsis than the general population.

In general, cancer patients were nearly four times as likely to be hospitalized with severe sepsis than people without cancer. Patients suffering from lymphoma, leukemia or other blood cancers were even more susceptible to severe sepsis than those suffering from cancer of a solid organ.

Patients with a blood cancer were 15 times more likely than the average person to suffer from severe sepsis. This higher rate corresponds to the fact that these patients are likely to be more severely immunocompromised than patients with other forms of cancer.

"We found that severe sepsis is a common, deadly, and costly complication in cancer patients," write the authors. "This complication was associated with nearly a three-fold increase in the time spent in hospital. We estimate that the annual hospital costs for these patients exceed US$3 billion annually"

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This press release is based on the following article:

Hospitalized cancer patients with severe sepsis: analysis of incidence, mortality, and associated costs of care Mark D Williams, LeeAnn Braun, Lisl M Cooper, Joseph Johnston, Richard V Weiss, Rebecca L Qualy and Walter Linde-Zwirble Critical Care 2004, 8:R291-R298

Upon publication this article will be available free of charge according to Critical Care's Open Access policy at http://ccforum.com/content/8/5/R291

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Critical Care (http://ccforum.com/home) is published by BioMed Central (http://www.biomedcentral.com), an independent online publishing house committed to providing Open Access to peer-reviewed biological and medical research. This commitment is based on the view that immediate free access to research and the ability to freely archive and reuse published information is essential to the rapid and efficient communication of science. BioMed Central currently publishes over 100 journals across biology and medicine. In addition to open-access original research, BioMed Central also publishes reviews, commentaries and other non-original-research content. Depending on the policies of the individual journal, this content may be open access or provided only to subscribers.

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