Two studies in the February 1 issue of the Journal of the National Cancer Institute examine whether hospital volume, surgeon experience, or surgeon specialty affect the treatment received and the risk of death following treatment among women with ovarian cancer.
Past studies have suggested that patients treated at hospitals with higher case loads or by more experienced surgeons have higher survival rates after surgery for certain types of cancer, including colorectal cancer and lung cancer. Patients may take such factors into account when making decisions about where and from whom to seek medical care.
Ovarian cancer ranks fourth in cancer death in U.S. women and was expected to have claimed more than 16,000 lives in 2004. It is typically a disease of women in their sixth or seventh decade. To examine the association between hospital case volume and procedure-specific experience of surgeons on outcomes after ovarian cancer surgery, Deborah Schrag, M.D., of the Memorial-Sloan Kettering Cancer Center in New York City, and colleagues used the Surveillance, Epidemiology, and End Results (SEER)–Medicare linked database to identify 2952 patients age 65 or older who had surgery for primary ovarian cancer between 1992 and 1999. They looked at both short-term (60-day) and longer term (2-year) mortality rates and overall survival.
Ariel Whitworth | EurekAlert!
Amputees can learn to control a robotic arm with their minds
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MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
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