Snus use is not associated
with pancreatic cancer, according to a study published in the International Journal of Cancer (abstract
here).
Researchers combined data from nine cohort studies that involved 400,000 men in
Sweden. Compared with never users, the
risk for current snus users, after adjustment for smoking, was 0.96 (95%
confidence interval = 0.83 – 1.11).
The new work was conducted by
the Swedish Collaboration on Health Effects of Snus Use, which includes
researchers from several Swedish universities.
(In the past, snus research was largely performed by the Karolinska
Institute, whose flawed studies I have previously documented here, here, here, and here.) Their
results are almost identical to those in a large study of smokeless use in North
America and Europe published six years ago (discussed here), and
to findings in another analysis published eight years ago (here).
Focus on a purported smokeless
tobacco-pancreatic cancer link began after publication of a cherry-picked
meta-analysis by Paolo Boffetta in 2008 (discussed here). Dr. Boffetta contradicted his own finding in
a later study (here), and
epidemiologist Peter Lee refuted it in his comprehensive analysis in 2009 (here). The fact is that there is no credible evidence
that American or Swedish smokeless tobacco is linked to pancreatic cancer.
Remarkably, the National
Cancer Institute persists in asserting a pancreatic cancer link in its
smokeless tobacco “fact sheet” (here). That document also asks what should be a
rhetorical question: “Is using smokeless tobacco less hazardous than smoking
cigarettes?”
The NCI’s answer is grossly misleading:
“all tobacco products are harmful and cause cancer…There is no safe level of
tobacco use.” The agency’s source for
this obfuscation is a 31-year-old Surgeon General report that has been eclipsed
by three decades of epidemiologic studies.
It should be noted that the
U.S. Food & Drug Administration is equally culpable. That agency used the bogus
smokeless-pancreatic cancer link as a talking point in last year’s $36 million
campaign against smokeless tobacco (here).
We already knew that moist
snuff and chewing tobacco have no measurable risk for mouth cancer (here). Now there is scientific evidence that smokeless
isn’t linked to pancreatic cancer.
