The Italian version of the 92-item Prodromal Questionnaire: Concurrent validity with the SIPS and factor analysis in a sample of 258 outpatients aged 11-36Â years

Psychometric properties of Italian PQ-92 were satisfactory. Optimal cut-offs were confirmed at ≥ 18 on the positive subscale, but at ≥ 36 on the total scale was able to identify more SIPS-positive cases.