Free full text can be found in her PhD: http://dare.ubn.kun.nl/handle/2066/19294 or http://repository.ubn.ru.nl/handle/2066/19294 Cognitive behaviour therapy for chronic fatigue syndrome: predictors of treatment outcome. Prins, J.B.; Bazelmans, E.; van der Werf, S.; van der Meer, J.W.M.; Bleijenberg, G. International Congress Series vol. 1241 September, 2002. p. 131-135 Although cognitive behaviour therapy (CBT) for chronic fatigue syndrome (CFS) is effective in several RCTs, little is known about predictors of treatment outcome. With the data of our RCT, where CBT for CFS was significantly more effective in improving fatigue severity and functional impairment than guided support groups and natural course, the predictive value of activity pattern, disability claims and psychiatric comorbidity was tested for outcome of CBT. Patients with a passive activity pattern and patients who were engaged in a legal procedure concerning financial benefits had a worse outcome. Psychiatric comorbidity was not a predictor. For patients with a passive activity pattern, another type of CBT has to be offered. CBT should not be offered to patients during their engagement in legal procedures of disability claims. Keywords: Cognitive behaviour therapy; Predictors; Randomised controlled trial ISSN: 0531-5131.