I don't know whether Sarah Tyson will continue to read this thread, or anyone from the MEA or BACME who is involved in and has some influence on this project. In the hope of being heard, I offer the following:
I think this is key. If we are to have useful PROMS for ME/CFS they need include the disease specific phenomenon of PEM openly and clearly, eliciting first whether the person actually experiences PEM. Checking whether they experience PEF (post exercise/exertion fatigue), DOMS (delayed onset muscle soreness), EI (exertion intolerance), fatiguability, should be part of this, all of which we are likely to experience in addition to PEM, but without PEM it's not ME/CFS, in which case the person is likely to need different diagnosis and management.
And then secondly, for clinical and personal care, some information on the occurence of PEM eplsodes - frequency, duration, severity, changes in and new symptoms, changes in function - are likely to be useful, so better focused pacing advice and assistance and symptomatic treatments can be provided.
In my email comment on this questionnaire quoted in an earlier post, I suggested that questions on immediate effects of any activity be separated from those specifically on PEM, and that PEM be defined and explained before going on to ask questions about whether the pwME experiences it.
It seems that the opposite approach is being used here, with the term PEM being avoided altogether and vaguer 'post activity symptoms' being used instead. Yet the term 'baseline' is used, even though many aren't able to operate with a known and consistent baseline, leaving pwME in a quandary about which effects they are being asked to include.
The name seems designed to muddle PEM with other effects of exertion:
Post Activity Symptom Scale (PASS) gives no clue that it's about PEM, and even the acronym PASS has the unfortunate association with pass/fail as if it were a test which will be judged. But more importantly, why not PEMQ, post-exertional malalse questionnaire.
I can see some value in asking in general terms things like have you noticed whether particular types of exertion - physical activity, thinking and remembering, social activity or emotional or stressful events - have a more significant effect on triggering episodes of PEM. That might lead to some discussion about what the pwME might be able to change or get assistance with in order to reduce deleterious effects on their health.
On the subject of whether this is a scale or a questionnaire, I think there is an important distinction, in my mind at least.
A questionnaire has questions on different aspects of a subject, in clinical care terms presumably intended to ensure different aspects of the patient's condition are conveyed succinctly to the clinician as a starting point for the consultation, to enable efficient transfer of key bit of information that will affect clinical care.
So for a PEM questionnaire, the aim is presumably to check whether the person is experiencing PEM according to a clear definition, and any particular features of it, such as new or particularly troubling symptoms that might be helped by medication, and whether new assistance is needed with pacing advice and aids, sick leave or adjustments if still in employment or education, provision of mobility aids and care etc.
A few tick boxes, and short spaces for writing a few words, might be useful for this purpose that enable the patient to convey which aspects are particularly important to them in this consultation, the aim being to conserve the patient's energy and help with their concentration and memory problems at the start of the consultation. It could even be done by the patient in advance to help pacing and shorten the consultation.
A scale, on the other hand, seems to be an information/data gathering exercise for clinic evaluation, or for assessing progress with a treatment or both. Since there is no treatment for ME/CFS, any calculation of a figure that's supposed to represent progress is inappropriate, and liable to pressure both on the patient to show 'progress' and on the therapist to demonstrate effectiveness.
This is where misinformation and potential for harm to patients is a real risk.
If i fill in the questionnaire indicating that very slight activity causes an increase in symptoms every day, which is true, but not PEM, then the therapist after a few sessions convinces me that I should rate activity that causes PEM as strenuous activity, my 'score' on the scale will show marked improvement, and the service, which may be as useful to me as a chocolate teapot, will fly through its service evaluation and its therapy approach written up as exemplary.
If I start off by understanding PEM and rate activity that triggers it as very strenuous, even though it is just a 20 minute walk, and then my ME deteriorates and tottering to the bathroom triggers PEM, there is no way of indicating on the questionnaire that I am able to do far less than before. 'Very strenuous' has morphed from 20 minutes to ten seconds of walking, but the score is the same. It may even be better, if I'm crashing less often because instead of trying to maintain a job, I'm lying in bed all day being cared for by a family member. My deterioration will pass unnoticed in my PEM score, so I will be recorded in the clinics data as stable or even improving and successfully pacing.
The NICE guidelines were based on evidence of usefulness. I don't see that here. PEM is important because it flags up a particular disease dynamic - feeling illi with an aberrant time relation to exertion. That aberrant time relation is what makes it a useful concept to me.
I think this is key. If we are to have useful PROMS for ME/CFS they need include the disease specific phenomenon of PEM openly and clearly, eliciting first whether the person actually experiences PEM. Checking whether they experience PEF (post exercise/exertion fatigue), DOMS (delayed onset muscle soreness), EI (exertion intolerance), fatiguability, should be part of this, all of which we are likely to experience in addition to PEM, but without PEM it's not ME/CFS, in which case the person is likely to need different diagnosis and management.
And then secondly, for clinical and personal care, some information on the occurence of PEM eplsodes - frequency, duration, severity, changes in and new symptoms, changes in function - are likely to be useful, so better focused pacing advice and assistance and symptomatic treatments can be provided.
In my email comment on this questionnaire quoted in an earlier post, I suggested that questions on immediate effects of any activity be separated from those specifically on PEM, and that PEM be defined and explained before going on to ask questions about whether the pwME experiences it.
It seems that the opposite approach is being used here, with the term PEM being avoided altogether and vaguer 'post activity symptoms' being used instead. Yet the term 'baseline' is used, even though many aren't able to operate with a known and consistent baseline, leaving pwME in a quandary about which effects they are being asked to include.
The name seems designed to muddle PEM with other effects of exertion:
This the second PROM – a questionnaire to measure the increase in symptoms after you exceed your baseline activity level. It is called the Post Activity Symptom Scale (PASS) has been co-produced with PwME/CFS and clinicians to ensure the questions capture the issues that are important to PwME/CFS, and it is easy to complete.
Post Activity Symptom Scale (PASS) gives no clue that it's about PEM, and even the acronym PASS has the unfortunate association with pass/fail as if it were a test which will be judged. But more importantly, why not PEMQ, post-exertional malalse questionnaire.
I can see some value in asking in general terms things like have you noticed whether particular types of exertion - physical activity, thinking and remembering, social activity or emotional or stressful events - have a more significant effect on triggering episodes of PEM. That might lead to some discussion about what the pwME might be able to change or get assistance with in order to reduce deleterious effects on their health.
On the subject of whether this is a scale or a questionnaire, I think there is an important distinction, in my mind at least.
A questionnaire has questions on different aspects of a subject, in clinical care terms presumably intended to ensure different aspects of the patient's condition are conveyed succinctly to the clinician as a starting point for the consultation, to enable efficient transfer of key bit of information that will affect clinical care.
So for a PEM questionnaire, the aim is presumably to check whether the person is experiencing PEM according to a clear definition, and any particular features of it, such as new or particularly troubling symptoms that might be helped by medication, and whether new assistance is needed with pacing advice and aids, sick leave or adjustments if still in employment or education, provision of mobility aids and care etc.
A few tick boxes, and short spaces for writing a few words, might be useful for this purpose that enable the patient to convey which aspects are particularly important to them in this consultation, the aim being to conserve the patient's energy and help with their concentration and memory problems at the start of the consultation. It could even be done by the patient in advance to help pacing and shorten the consultation.
A scale, on the other hand, seems to be an information/data gathering exercise for clinic evaluation, or for assessing progress with a treatment or both. Since there is no treatment for ME/CFS, any calculation of a figure that's supposed to represent progress is inappropriate, and liable to pressure both on the patient to show 'progress' and on the therapist to demonstrate effectiveness.
This is where misinformation and potential for harm to patients is a real risk.
If i fill in the questionnaire indicating that very slight activity causes an increase in symptoms every day, which is true, but not PEM, then the therapist after a few sessions convinces me that I should rate activity that causes PEM as strenuous activity, my 'score' on the scale will show marked improvement, and the service, which may be as useful to me as a chocolate teapot, will fly through its service evaluation and its therapy approach written up as exemplary.
If I start off by understanding PEM and rate activity that triggers it as very strenuous, even though it is just a 20 minute walk, and then my ME deteriorates and tottering to the bathroom triggers PEM, there is no way of indicating on the questionnaire that I am able to do far less than before. 'Very strenuous' has morphed from 20 minutes to ten seconds of walking, but the score is the same. It may even be better, if I'm crashing less often because instead of trying to maintain a job, I'm lying in bed all day being cared for by a family member. My deterioration will pass unnoticed in my PEM score, so I will be recorded in the clinics data as stable or even improving and successfully pacing.
Last edited: