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Ovarian Cancer: Obese And Non-obese Patients Have Same Overall Survival

Date:
January 14, 2009
Source:
University of Alabama at Birmingham
Summary:
A new study showed that when actual body weight was used in chemo dosing for epithelial ovarian cancer, the overall survival is 40 months for non-obese patients and 47 months for obese patients, not a significant difference. Similar outcomes are seen in obese and non-obese cancer survivors being monitored for recurrence of their ovarian cancer, the study authors said. Earlier studies found obesity as a negative indicator.

Obesity affects health in several ways, but new research shows obesity can have minimal impact on ovarian cancer survival. A study by researchers at the University of Alabama at Birmingham (UAB) Comprehensive Cancer Center found ovarian cancer survival rates are the same for obese and non-obese women if their chemotherapy doses are closely matched to individual weight.

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The findings contradict earlier research that shows obese women have lower ovarian cancer survival rates compared to non-obese patients. In the UAB study, such survival disparity disappeared when chemo doses were calculated by actual body weight rather than a different dosing standard, said Kellie Matthews, M.D., a UAB gynecologic oncologist and lead author on the new study.

"Often chemotherapy dosing is calculated using 'ideal' body weight as a guide. We found using actual body weight works best, and it wipes away much of the difference in survival rates between obese and non-obese patients," Matthews said.

The results are published online in the journal Gynecologic Oncology.

Researchers reviewed the medical records of 304 patients diagnosed with an aggressive form of the disease called epithelial ovarian cancer. Patients were of similar cancer stage and grade, and all had surgery followed by chemo.

The analysis showed that when actual body weight was used in chemo dosing the overall survival is 40 months for non-obese patients and 47 months for obese patients, not a significant difference, Matthews said. Similar outcomes are seen in obese and non-obese cancer survivors being monitored for recurrence of their ovarian cancer.

UAB's chemo dosing formula includes actual weight, body mass index (BMI) and other factors, Mathews said. Obesity is defined as a BMI (BMI: kg/m2) of 30 or more.

The study authors acknowledged that while it was possible to follow this formula and remove obesity as a negative indicator for ovarian cancer survival, obesity still puts women at increased risk for complications related to cancer surgery, such as greater blood loss and stubborn-to-heal incisions. Also, research shows obese women are more likely to have other health problems such as diabetes and cardiovascular disease that may impact cancer treatment.


Story Source:

The above story is based on materials provided by University of Alabama at Birmingham. Note: Materials may be edited for content and length.


Cite This Page:

University of Alabama at Birmingham. "Ovarian Cancer: Obese And Non-obese Patients Have Same Overall Survival." ScienceDaily. ScienceDaily, 14 January 2009. <www.sciencedaily.com/releases/2008/12/081229104706.htm>.
University of Alabama at Birmingham. (2009, January 14). Ovarian Cancer: Obese And Non-obese Patients Have Same Overall Survival. ScienceDaily. Retrieved March 28, 2015 from www.sciencedaily.com/releases/2008/12/081229104706.htm
University of Alabama at Birmingham. "Ovarian Cancer: Obese And Non-obese Patients Have Same Overall Survival." ScienceDaily. www.sciencedaily.com/releases/2008/12/081229104706.htm (accessed March 28, 2015).

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