Psychotic-like experiences and multimorbid psychopathology: The relationship between the 16-item prodromal questionnaire and DSM-IV classifications in a help-seeking population.

Aim: Identifying multimorbid psychopathology is necessary to offer more adequate treatment and ultimately reduce the prevalence of persistent mental illnesses. Psychotic symptoms are increasingly seen as a transdiagnostic indicator of multimorbidity, severity and complexity of non-psychotic psychopathology. This study aims to investigate whether psychotic-like experiences and subclinical psychotic symptoms as measured by the 16-item Prodromal Questionnaire are also associated with multimorbid psychopathology.