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Patterns of daytime physical activity in patients with chronic fatigue syndrome, 2020, Chalder, Sharpe, White et al

Discussion in 'PsychoSocial ME/CFS Research' started by Andy, May 28, 2020.

  1. Andy

    Andy Committee Member & Outreach

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    Not sure if this deserves it's own thread or should be folded into the PACE thread as it's based on PACE trial data.
    Paywall, https://www.sciencedirect.com/science/article/abs/pii/S0022399919310323
    Sci hub, https://sci-hub.tw/10.1016/j.jpsychores.2020.110154
     
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  2. MSEsperanza

    MSEsperanza Senior Member (Voting Rights)

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    So the biggest group (38%) showed an "indeterminate pattern".

    Couldn't they have done something useful with accelerometer data, e.g. if they had let particpants wear the devices at some time points during and after treatment?

    Or if they at least had included PEM as a hypothesis in their analysis instead of "boom-bust"?
     
    Last edited: May 28, 2020
  3. MEMarge

    MEMarge Senior Member (Voting Rights)

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    Something to flick thro later and make me angry.

    This type of trash increase my energy to fight against the BPSers.

    "We used the mean of the entire sample to define the reference value and regarded any daily activity score falling below this as relatively inactive. We defined a participant as being pervasively inactive if their daily mean activity score fell below the reference value on every day, since Journal Pre-proof Journal Pre-proof we only recorded actigraphy for up to 7 days, rather than the 12 days of the previous study"

    "Pervasively Active (PA): Participants were defined as being pervasively active if their mean daily activity level was above the mean reference value on every day"

    Then for BOOM and BUST:
    "1. Lowest activity levels on the first complete day – The participant had come to the hospital to have their Actiwatch fitted on the previous day making this a high activity day. A participant showing a boom and bust pattern of activity might follow this by a day of low activity, making the first completed day of actigraphy data particularly low.

    2. Range larger than average – Because these participants were likely to exhibit more extreme activity levels, the range between their highest and lowest days of activity were likely to be higher than average.

    3. Most active day followed by least active day – This assumed that if a BB participant had a day of high activity, the following day the participant would be inactive as they had exhausted their energy.

    4. Most active day followed by day of <50% that activity – This simply assumes that following a day of highest activity, a BB participant’s activity levels would drop dramatically."

    They are trying to psychologise any activity levels it seems!
     
  4. Trish

    Trish Moderator Staff Member

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    They were supposed to wear them again at the end of the trial, but the researchers made up nonsensical reasons not to do this (too much of a burden for patients). It seems pretty clear they changed their minds when they saw from other trials that step counts didn't improve.
     
  5. strategist

    strategist Senior Member (Voting Rights)

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    They measure steps per day for "up to 7 days" and talk about activity patterns. This is far too short.
     
  6. Tom Kindlon

    Tom Kindlon Senior Member (Voting Rights)

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    There is no control group.

    Here are some research studies that found no difference in variations in activity patterns when a control group was used:
    "The heterogeneity in the physical activity pattern between subjects within the CFS and control group did not differ." https://pubmed.ncbi.nlm.nih.gov/21843746/

    "There is no difference in variation of physical activity levels between patients with chronic fatigue syndrome and healthy control subjects" https://pubmed.ncbi.nlm.nih.gov/20943713/

    "No between-group differences were found in the pattern or amount of sleep, activity, or cortisol secretion."
    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3079947/

    "the present study was not able to confirm the hypothesis of a more fluctuating activity pattern in patients with CFS, nor during the day, nor during the registration period." https://www.sciencedirect.com/science/article/abs/pii/S0003999311004175

    "there were no significant group, gender or interaction effects for the number of absolute large or relatively large day-to-day fluctuations (Table 2 and Table 3)." https://pubmed.ncbi.nlm.nih.gov/11164063/
     
  7. rvallee

    rvallee Senior Member (Voting Rights)

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    Selective reporting of data is not an acceptable practice. The plan was to measure activity at the beginning and end of the trial, not do some BS analysis trying to cherry-pick random correlations from only one initial measure. This is infantile in its incompetence. Mythbusters were more rigorous in their experiments.

    So why is it accepted here? Why the exemptions that allow BPS research to violate all rules and norms? Why do the editors play favorites with this ideology?

    All of this on the backside of having invented the most BS excuse possible, that it was too much of a burden. Clearly not. I guess that excuse really needs to be revisited since it is such BS that they actually completed an initial record. On top of the absurdity of claiming wearing a small device is too much of a burden in an experiment that aims to get people to do as much physical activity as they possibly can. This is Soviet-level of political BS and the fact that it is defended, actually defended, in medical research is absolutely bonkers.
    But they literally weren't. This is complete BS, wishful thinking.
    Coming from the people who have been selling for decades their belief system in which they "explain" the aetiology. Literally most of their "treatments" consists of "explaining" the aetiology. Which they admit here is BS. How is that acceptable??!
    Chalder has been selling that particular BS for years. She constantly refers to it as being validated and here, again, they admit it's completely made up. How are these people allowed to spew complete BS unopposed, even elevated by the very gatekeepers of science who simply choose not to do their job for inexplicable reasons?
    Based on the experiment's entry criterion of an SF-36 below 65 this is literally contradictory. It's like an experiment of very tall people where some are hypothesized to actually be short. Makes zero sense.

    The "patterns of activity" are completely arbitrary, they just hacked square pegs so a few of them would fit in round holes. The definition of "boom and bust" is just laughable. Whoever approves and publishes this is an embarrassment to science..
     
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  8. Snowdrop

    Snowdrop Senior Member (Voting Rights)

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    Is this the final paper to be expected from this trial (i have a dim memory of FoI requests being denied because further papers were still to be written on the trial)?

    Was this paper expected or have the authors decided to publish all out of the blue?
     
    Last edited: May 28, 2020
  9. Snow Leopard

    Snow Leopard Senior Member (Voting Rights)

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    They think PEM is Boom-bust! ;)

    Also note the boom-bust categorisation was post-hoc.
     
  10. Dolphin

    Dolphin Senior Member (Voting Rights)

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    One thing they mentioned they planned doing was a predictors paper where they looked at how baseline factors influenced outcomes. This doesn’t do that. So it's unclear whether that paper will ever come out and if it doesn’t, whether that was because the results didn’t suit them (we have no idea whether they do or not; they still consider CBT and GET worked based mainly on subjective measures at 6 and 12 months).
     
    Last edited: May 29, 2020
  11. MSEsperanza

    MSEsperanza Senior Member (Voting Rights)

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  12. Cheshire

    Cheshire Moderator Staff Member

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    Sharpe et al. are pervasively unsurprising...
     
  13. dave30th

    dave30th Senior Member (Voting Rights)

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    Exactly right. They interpret the payback people experience after activity in psychological terms that fit their hypothesis.
     
  14. Barry

    Barry Senior Member (Voting Rights)

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    Yes it is well understood that pwME's physiology responds abnormally to exercise. And yet even as these folk now feel they need to embrace the notion of exercise intolerance, is it just me, or does the above phraseology make it almost sound like mere laziness, rather than a physical intolerance?

    And this very post hoc claim that GET aims to reduce exercise intolerance ... who is kidding who here? It never aimed to do anything of the sort before, so why suddenly invent a new claim retrospectively for it? Surely not some desperate attempt to legitimise the illegitimate?
     
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  15. Sarah94

    Sarah94 Senior Member (Voting Rights)

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    I thought Sharpe had retired from me research...
     
  16. Ravn

    Ravn Senior Member (Voting Rights)

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    There've been some who have likened our exercise intolerance to the sort of allergy that you treat with desensitisation therapy - so GET would be a sort of desensitisation therapy for us. Once again I can't remember who said that - can somebody please give me my memory back! - but likely it was someone who subscribes to the central sensitisation idea.
    Just another case of it doesn't matter what the problem is, the answer's always GET.
     
  17. Obermann

    Obermann Senior Member (Voting Rights)

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    Doesn't this undermine the cognitive behavioural model for ME/CFS? The model proposes that inactivity is part of the problem, and the PACE authors have also sometimes claimed that "boom and bust" is part of the problem. If many different kinds of activity patterns can be identified in the patient group, it seems implausible that the illness can be reversed by adhering to a specific activity pattern.
     
  18. EzzieD

    EzzieD Senior Member (Voting Rights)

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    It was the Mayo Clinic https://www.mayoclinic.org/diseases...gue-syndrome/diagnosis-treatment/drc-20360510
    That whole page is just dreadful.
     
  19. Barry

    Barry Senior Member (Voting Rights)

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    [my bold]

    Don't these truth-weavers love their use of the word 'may'. Like, a miracle may happen tomorrow. Seems to be a much-favoured get-out-jail-free word for them. (Basically covering themselves in that they may be talking a lot of bullocks, but did not make a definitive statement on it!).
     
  20. EzzieD

    EzzieD Senior Member (Voting Rights)

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    Yes, BPS folks really LOVE 'may', and also 'suggests', 'it is assumed', 'it is thought', and other words/phrases along those lines, to make the results suit their own biases/personal beliefs. Science and, y'know, actual evidence, are unnecessary!
     

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