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Friedberg and Adamowicz1 make several interesting observations in their review of recovery rates reported in White et al.2 However, we disagree with them that a previous trial of an active behavioural intervention, Deale et al, which reported very similar recovery rates to White et al, ‘used similar recovery criteria’.1–3
The White et al2 recovery criteria were: Chalder Fatigue Questionnaire (CFQ; Likert scoring) and Short Form (SF)-36 physical functioning (PF) scores in normal range (ie, ≤18 and ≥60, respectively); Oxford CFS criteria not met; and …
Competing interests TK works in an unpaid capacity with the Irish ME/CFS Association.
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