BMC Psychiatry. 2025 Aug 28;25(1):831. doi: 10.1186/s12888-025-07282-5.
ABSTRACT
BACKGROUND: The first aim of the study was to assess the validity of non-affective psychosis diagnoses, including schizophrenia, for migrants and Swedish-born to determine if the registered diagnoses were of sufficient quality for epidemiological research. If the validity was insufficient, the second aim was to find out what the non-valid cases have in common to see if there was a feasible way to handle these cases in future studies.
STUDY DESIGN: We validated the register-diagnoses of 179 randomly selected patients aged 18-48 living in municipalities with a high proportion of migrants, diagnosed with non-affective psychotic disorder (F20-F29 according to ICD-10), drawn from the Region of Stockholm’s medical records database by comparing them to their case notes to see if they fulfilled the DSM-5 criteria.
RESULTS: We found acceptable validity for non-affective psychotic disorder for migrant men (70.5%), low for Swedish-born men (60.0%), and even lower for women (50.0% for Swedish-born and 40.0% for migrants). There was no statistically significant difference between Swedish-born and migrants. The case notes revealed that by excluding cases with an additional diagnosis equivalent of psychotic disorder due to psychoactive substance (ICD10: F11X.5 and F11X.7) the validity was good for both Swedish-born and migrant men.
CONCLUSIONS: This study supports continued use of the register-diagnoses but only after taking appropriate measures to avoid that patients with additional psychotic disorder due to psychoactive substance are not violating the validity. It also suggests caution when studying non-affective psychosis diagnoses among migrant women as the validity is low, possibly due to difficulties in separating non-affective psychosis from symptoms of other disorders with psychotic features.
PMID:40877884 | DOI:10.1186/s12888-025-07282-5