Center for Disease Control's head of CFS research Dr. Beth Unger is slated to do a
problematic one-day ME exercise study called the Cardiopulmonary-Exercise Testing, instead of the two-day test favored by
most patients and ME-educated researchers. What’s wrong with Unger's
study?
The problem is that studies show that defects in ME patients' exercise capacity aren't evident until the second day of testing. With one-day testing, ME
patients resemble deconditioned controls, a fancy phrase for couch potatoes.
In a letter discussing her reasons
for favoring the one-day study, Unger says two days would be an “unnecessary
burden” for patients. Would most patients prefer a difficult one-day study that
makes ME sufferers out to be indolent grumblers or a grueling two-day study
that shows just how sick ME patients are? Do I really have to answer that
question? Besides, the very sick patients who can't handle the second-day
exercise test provide helpful data for researchers. The fact that they can't do
a second day would become part of the study's findings.
Could Unger just not know about second-day
crashing in ME patients? Dr. Chris Snell, an expert in the field of
exercise testing for ME patients and a proponent of two-day testing, served as
president of the Chronic Fatigue Syndrome Advisory Committee (CFSAC). Unger
attends its meetings, so she's aware of his work.
In citing other reasons for her decision to go ahead with one-day testing,
Unger said more patients could be tested in a one-day study. To which I say:
Quality, Dr. Unger. Not quantity.
Exercise Not Negotiable
When the one-day study shows most ME patient to
be just deconditioned—not sick—the phony prescription will be, of course,
exercise. Patient advocate Mary Schweitzer, in a terrific post on Unger's proposed study, calls it a set-up; I call it
rigged.
Unger believes in graded exercise for ME
patients the way Republicans believe in the late Ronald Reagan. In fact, Mary
Schweitzer makes this trenchant point about Unger:
"The only time I ever saw Dr. Unger get
angry in a CFSAC meeting was when we were all calling for a change in the CDC's
recommendation of graded exercise. We asked not only that they quit
recommending it, but also that they openly WARN physicians about the dangers.
She was furious. She said that the emphasis on graded exercise was supported by
scientists and was 'not negotiable.' Those very words. 'Not negotiable.' "
Patients need a CDC researcher who
understands how dangerous exercise can be. How does Beth Unger get off
telling patients that she knows best, that graded
exercise is good for them, when it's the patients—not she—who understand
this disease, who've been suffering for years if not decades?
Patient advocate Cort Johnson has also written
an in-depth piece arguing for a two-day
exercise study. He points out that instead of enlisting the experts in the
field to conduct the study—Snell and Stevens—CDC is calling upon Connie Sol,
who, he writes, has done only one study.
Chris Snell's Studies
The way I see it, it's clear to most patients,
advocates and ME-educated researchers that a two-day exercise test is
necessary. In a letter, Unger explained that she had consulted Snell on which
he thought was the better approach—one-day or two-day exercise testing. Snell
said two-day testing.
When asked to comment on Unger's proposed study, Snell wrote in an email to CFS
Central: "Unfortunately
I do not feel able to comment on the proposed CDC study at this point. I am not
involved in the study and do not know much about the design, measures, or any
hypotheses they intend to test. My views on exercise testing for ME/CFS are
well-documented, including a number of presentations available on the WWW. The
most recent is the FDA ME/CFS drug development workshop earlier this year.
Please feel free to cite any of our work or public comments."
"The objectives for this study was to determine the
discriminative validity of objective measurements obtained during CPET to
distinguish individuals with CFS from non-disabled sedentary
individuals. Methods Gas exchange data, workloads and related physiological
parameters were compared between 51 individuals with CFS and 10
control subjects, all females, for two maximal exercise tests
separated by 24 hours. Results Multivariate analysis showed no
significant differences between controls and CFS for Test 1.
However, for Test 2 the individuals with CFS achieved
significantly lower values for oxygen consumption and workload at
peak exercise and at the ventilatory/anaerobic threshold. Follow-up
classification analysis differentiated between groups with an overall accuracy
of 95.1%. Conclusions The lack of any significant differences between
groups for the first exercise test would appear to support a
deconditioning hypothesis for CFS symptoms. However, results from the
second test indicate the presence of a CFS related post-exertional
fatigue. It might be concluded that a single exercise test is
insufficient to reliably demonstrate functional impairment in individuals
with CFS. A second test may be necessary to document the atypical recovery
response and protracted fatigue possibly unique to CFS, which can severely
limit productivity in the home and workplace."
In other words, according to Snell's study, it takes two days of testing to see the poor
recovery response—post-exertional malaise—in patients.
Tom Hennessy
On another note, Tom Hennessy, a ME patient
I’ve know for 19 years who lived with debilitating pain, committed suicide on
September 9th. If Beth Unger, CDC and HHS spent more time doing
legitimate research, perhaps patients like Tom
wouldn’t feel the need to end their lives.
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