5. Study characteristics.

Study Details	First author, year, publication status, country, aim of study
Patient characteristics and setting	Number of participants included in study and number in analysis Description of participants in the study (age, gender, ethnicity, comorbid disorders, duration of symptoms, and concurrent medications used) Predefined inclusion and exclusion criteria Study aim Previous treatment for schizophrenia Clinical setting Country
Index test	Description of FRS used Professionals performing test Resolution of discrepancies How FRS used in study
Target condition and reference standard(s)	Reference standard Target condition(s) Professionals performing test Resolution of discrepancies
Flow and timing	Study process Follow‐up

FRS: first rank symptoms