In a recent review article in the British Journal of Psychiatry (BJPsych (2013) 203, 327-333) P.A. Garety and D. Freeman argue that the focus of intervention and research in delusional disorders should rather be on the individual experience of psychosis than on diagnostic categories. They also identified mediating or modiying factors for distress of the individual’s delusion, e.g. poor self-esteem, worry, insomnia, feelings of pwerlessness, poor belief-flexibility and jumping to conclusions. In regard to Cognitive Behaviour Therapy (CBT) for psychosis, the existence of a carer was associated with a better outcome.
