Pay Attention To The Data Set
Thu Jan 07 04:52:29 GMT 2010
by Mary M. Schweitzer, Ph. D.
There is an old saying in computerized statistics:
GIGO. It means garbage in-garbage out - the study is only as good as the data set.
In this case, the data set came from patients diagnosed with a version of CFS that is entirely
Simon Wessely, one of the co-authors, has stated numerous times that he believes the disease to be a type of neurosis once called "neurasthenia" ("the vapors," a "nervous condition," a "nervous breakdown").
Two more of the seven authors on this study work with Wessely at Kings College, London.
Wessely once told a patient with neurally mediated hypotension (suggested as a cause or contributing factor in JAMA, fall 1995) that she could not possibly have CFS because all patients with physically explainable symptoms would have been weeded out
before they reached his clinic for diagnosis.
Makes for a tautology, then, if there are no physical abnormalities in his patients.
Kings College, London, follows the theory that
patients with CFS hold "inappropriate illness beliefs,"
and they have to re-learn that (1) they are well,
through cognitive behaviour therapy (CBT), and (2)
they can be reconditioned, through graded exercise
therapy (GET) - and then they can happily go back to
work and family.
These theories have sent children and even adults to
foster care or psychiatric hospitals for the sin of
having "chronic fatigue syndrome."
The Kings College picture of CFS can be viewed on
their website, at:
If you are pressed for time, read the section called
"Letting go of support," at:
The fact of the matter is that patients so
diagnosed do not have the disease that was
studied at the Whittemore-Peterson Institute.
Most likely, they have a form of depression.
A great deal of useful resarch into biomedical
markers and viruses has been conducted using the
Fukuda definition for CFS (CDC, 1994).
Wessely, White, Sharpe, Cleare, Chalder, et al,
however, origionally rejected the Fukuda definition,
substituting instead a definition that did not include
any physical symptoms but allowed depression.
The result, not unsurprisingly, is that most of their
patients suffer from some form of depression.
(Ironically, the jury is still out on whether CBT/GET
even helps the depressed patients.)
In this article, however, the researchers claimed to
have used the U.S. CDC Fukuda definition. The
definition requires six months of debilitating fatigue
plus four our of eight possible physical symptoms.
If the correct symptoms are chosen, particularly
if interpreted more generally, it is possible to
make depressed patients look like they fit the
Note what happens if you use the following:
- Six months of fatigue
- Sleep abnormalities
- General aches and pains
- Distraction or confusion
Who needs a retrovirus when "CFS" can be so easily
"cured"? According to Kings College, "Our routine
treatment is cognitive behaviour therapy ... Some
individuals receive CBT over the telephone if they
live a long way from the unit or find travelling
The patients who have tested positive for XMRV in
the Mikovits et al studies have very different medical
Most have other diagnosed medical conditions -
including, but not limited to, Coxsackie B, Adenovirus
4, HHV-6 (Variant A), recurring EBV, HHV-7,
cytomegalovirus, chlamydia pneumonae,
Many of them have a nonexistent natural killer cell
function, a viral antibody truncated in half (the
37kDa Rnase-L), and/or inverted T-cell ratios. Some
who have been sick for decades have developed
myocarditis, stem cell cancer, Burkett's lymphoma -
and of these, too many have already died.
What on earth do the King's College clinic's
patients have in common with those of Dan
Peterson at Incline Village, NV?
Only the name "chronic fatigue syndrome."
There is no shared meaning.
For a true evaluation of the XMRV research, it's
necessary not only to follow the process precisely,
but also to use a comparable data set. This data set
has absolutely nothing in common with the one used
by the WPI, NCI, and Cleveland.
And that is what is meant by the old saying, GIGO.
Reviewers of research for publication must pay more
attention to the data sets being used. The results
mean nothing if you are comparing apples to
It is also well past time that political entities
charged with the health and well-being of the public
ALSO pay attention to the way research has been
constructed, not just the abstract or the final
Without consistency, there is no science. Only
Mary M. Schweitzer, Ph.D.