NY Times Article: "Researchers report that a woman’s regular
use of aspirin may decrease her risk for melanoma, the most serious kind
of skin cancer.
The study, published online in the journal Cancer,
included 59,806 women ages 50 to 79. Researchers gathered health and
lifestyle data at the start of the study, and the women reported their
health in yearly questionnaires over an average 12 years of follow-up.
The women brought in their medicine bottles for the researchers to
examine and record.
There were 548 incidents of melanoma during the period. After
controlling for sun exposure, sunscreen use, a history of skin cancer
and many other factors, the researchers found that women who reported
using aspirin had an average 21 percent lower risk of melanoma compared
with nonusers, and the longer they used aspirin, the lower their risk.
The reasons for the effect are unclear, but the authors suggest that
aspirin’s known effect in promoting cell death and activating tumor
suppressor genes may be factors.
The senior author, Dr. Jean Y. Tang, an assistant professor of
dermatology at Stanford, pointed out that the study was observational
and not a clinical trial, and correlation does not equal causation.
“It’s an important finding for high-risk women to discuss with their
doctors,” she said, “but it’s way too early to recommend that everyone
go take aspirin to prevent melanoma.”
Comment: It is discouraging that the Cancer (Journal) article is not free open access, considering that federal funds were probably used for the study. The question is whether the relative risk reduction outweighs aspirin's known side-effects.
Reference:
Aspirin
is associated with lower melanoma risk among postmenopausal Caucasian women:
The Women's Health Initiative. Gamba CA, et. al. Cancer. 2013 Mar 11. doi:
10.1002/cncr.27817.
Source: Stanford University
School of Medicine and Cancer Institute, Stanford, California.
One needs to understand the difference between Relative Risk and Absolute Risk to judge the value of this finding. See: RR vs. AR article.