Also from the referenced paper of Artom et al (2016) that found no correlation with fatigue in general, and no causation:
https://onlinelibrary.wiley.com/doi/full/10.1111/apt.13870
My bolding. Again the impression seems to be (and there is more detail on the other scales but I didn't want to paste too much) very careful consideration of using the measures both specifically to the conditions being studied and for them to be analysed appropriately for the Artem et al (2016) paper.
This [Moulton et al, 2023] paper uses just the CBSQ (it seems to be the same scale from the long form writing out of its title, even though it uses the acronym CBRQ) and for the same CBSQ measure notes:
https://onlinelibrary.wiley.com/doi/full/10.1111/apt.13870
Predictors of the outcome variables
Based on findings in other conditions a decision was made to explore a number of emotional (anxiety and depression, stress and distress), cognitive (illness perceptions and symptom beliefs) and behavioural factors (avoidance and all-or-nothing behaviours, and daytime sleepiness) as potential predictors of the outcome variables.
The Hospital Anxiety and Depression Scale (HADS),60 Cohen Perceived Stress Scale (PSS)61 and the Inflammatory Bowel Disease-Distress Scale (IBD-DS)62 were used to assess potential emotional factors associated with the outcome variables. The HADS was selected for this study as it was originally developed for physically ill patients and no items about somatic symptoms are included.63
Cognitive factors were assessed using The Brief Illness Perceptions Questionnaire (BIPQ)66 and the cognitive subscales of the Cognitive Behavioural Response to Symptoms Questionnaire (CBSQ).33 The study utilised a modified version of the BIPQ consisting of eight items: five assess cognitive illness representations (consequences, timeline, personal control, treatment control and identity); two emotional representations (concern and emotions) and one item assesses illness comprehensibility. The open-ended response item assessing the causal representation of fatigue was excluded from the questionnaire. In line with recommendations from the authors of the scale,67 to make the questionnaire more relevant to the IBD patient group, the word ‘illness’ was replaced with ‘fatigue’. This has been done in other studies68-70 assessing clinical and psychosocial outcomes in patients with long-term conditions to make the questions more specific to their topic of research. Each item is rated on a 0–10 scale. Given the known limitations of assessing content validity with single item measures71 and the increased risk of type 1 errors when using multiple testing,72 a total sum Fatigue perception score (ranging 0–80) was calculated as opposed to calculating scores for the individual subscales. Higher sum scores indicated more negative, unhelpful representations of IBD-fatigue. The CBSQ measures patients’ cognitive and behavioural responses to their symptoms (of fatigue). It contains 40 items measured on a 5-point Likert scale. Items are added to form five cognitive subscales (fear avoidance,embarrassment avoidance, damage beliefs, symptom focus and catastrophising about symptoms). Higher scores indicate more negative cognitive responses to fatigue symptoms.
Behavioural factors associated with fatigue and QoL were assessed with the behavioural subscales of the CBSQ (resting and avoidance of activity and all-or-nothing behaviour) and the Epworth Sleepiness Scale (ESS).73
My bolding. Again the impression seems to be (and there is more detail on the other scales but I didn't want to paste too much) very careful consideration of using the measures both specifically to the conditions being studied and for them to be analysed appropriately for the Artem et al (2016) paper.
This [Moulton et al, 2023] paper uses just the CBSQ (it seems to be the same scale from the long form writing out of its title, even though it uses the acronym CBRQ) and for the same CBSQ measure notes:
Behavioral responses to symptoms were assessed by the 2 behavioral subscales of the Cognitive and Behavioral Responses to Symptoms Questionnaire (CBRQ).7 ......Higher subscale scores indicate more unhelpful behaviors. Internal consistency for each subscale was high (Cronbach’s α ranging from 0.8 to 0.9). ..........Cognitive responses to symptoms were assessed by the 5 cognitive subscales of the CBRQ.
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