First rank symptoms in first episode psychosis and their relationship to the duration of untreated illness.
Most studies of First Rank Symptoms (FRS) are based on cross-sectional inpatient samples of people with schizophrenia at various stages of illness. We sought to examine the prevalence of FRS in a representative sample of first episode psychosis patients and compare those with and without FRS clinically and in terms of duration of untreated illness. Information was gathered from 158 consecutive cases of first episode psychosis presenting in a defined geographical region through semi-structured interview tools. Of this sample, 40.5% of cases received a diagnosis of schizophrenia. The prevalence of FRS among the entire group was 52.5%. After controlling for multiple testing, no FRS contributed significantly to predicting a diagnosis of schizophrenia. There was no significant relationship between the duration of untreated illness and FRS.
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