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Chalder fatigue scale
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=== Likert or bimodal scoring === The Chalder fatigue has two scoring system. In the bimodal scoring system, respondents answer each question with a 1 or a 0 to indicate the questions apply to them or not. In the Likert scoring system, respondents can give a score of 0 to 3 to indicate how each statement applies to them, from “less than usual” to “much more than usual”.<ref name=":16">[http://www.goodmedicine.org.uk/files/assessment,%20chalder%20fatigue%20scale.pdf goodmedicine.org.uk. Chalder Fatigue Scale.]</ref> {| class="wikitable" | colspan="3" |'''Scoring schemes for the Chalder Fatigue Scale''' |- | |Bimodal score |Likert score |- |Less than usual |0 |0 |- |No more than usual |0 |1 |- |More than usual |1 |2 |- |Much more than usual |1 |3 |} While the first version counts the number of symptoms, the other weights the intensity of the symptoms. Some have argued that these changes should not be seen as merely different scoring schemes, but as different versions of the same scale.<ref name=":2" /> In the PACE trial both scoring schemes of the Chalder fatigue scale were recorded. The data showed that 22 participants showed improvement at the primary trial endpoint based on one scoring method, while the other scoring method showed a decline.<ref>Dataset available at <nowiki>https://sites.google.com/site/pacefoir/pace-ipd_foia-qmul-2014-f73.xlsx?attredirects=0</nowiki>, ‘readme’ file <nowiki>https://sites.google.com/site/pacefoir/pace-ipd-readme.txt?attredirects=0</nowiki></ref>
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