Scalability of the Positive and Negative Syndrome Scale in first-episode schizophrenia assessed by Rasch models.
Lone BaandrupPeter AllerupMette Ødegaard NielsenSigne Wegmann DüringKirsten B BojesenStefan LeuchtSilvana GalderisiArmida MucciPaola BucciCelso ArangoCovadonga Martinez Diaz-CanejaPaola DazzanPhilip McGuireArsime DemjahaBjørn H EbdrupWolfgang W FleischhackerRené S KahnBirte Y GlenthøjPublished in: Acta psychiatrica Scandinavica (2022)
The results demonstrate the operational consequences of a lack of statistical fit of the Rasch model and suggest that the calculated measure of uncertainty needs to be considered when using the PANSS-30 total score.