Aim: Disorders usually first diagnosed in infancy, childhood or adolescence (DUFD-ICA) may have preceded the onset of psychosis by several years and share some co-morbidity with psychotic disorders, but only a few studies have investigated this aspect. We looked for past or current DUFD-ICA in a sample of first adult psychiatric service users assessed for the presence of an at-risk mental state with the Structured Interview for Psychosis-risk Syndromes (SIPS).
Methods: We interviewed with the SIPS 159 first-time help seekers (age range 13-30 years) at adult psychiatric services who volunteered to participate in the study. For psychiatric diagnoses, we used the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition-Text Revision. We also assessed retrospectively the presence of DUFD-ICA and administered the Brief Psychiatric Rating Scale (BPRS) and the Global Assessment of Functioning. The sample has been subdivided diagnostically into first-episode psychosis, multiple episode psychosis, ultra-high risk (UHR) and other diagnoses.
Results: The risk for having one of first-episode psychosis, multiple episode psychosis or UHR was over 3.45 higher in the DUFD-ICA-positive history group than in the non-DUFD-ICA. Grouping the UHR with the not full-blown psychosis cases resulted in a further increase of the risk to 4.71. DUFD-ICA-positive participants scored higher than non-DUFD-ICA on the Positive, Negative and Disorganization scales of the SIPS and on several core-psychotic BPRS items.
Conclusions: A positive history of DUFD-ICA increases the risk of a diagnosis of prodromal or current psychosis at help seeking. Impaired neurodevelopment may be shared among the psychoses and DUFD-ICA.
© 2012 Wiley Publishing Asia Pty Ltd.