Table 1. Summary statistics for clinical and demographic variables characterizing the schizophrenia and control cohort.

Demographic/clinical variable	Summary statistics
Diagnosis: SZ/CTRL	112/76
Mean age	39.4
Gender: M/F	101/82
Mean age at the onset of illness	24.2
Family history of schizophrenia (cases): present/none	41/55
Family history of other psychosis (cases): present/none	49/47
Mean duration of illness	16.4
Mean RQI	9.3

Abbreviations: CTRL, non-psychiatric control; F, female; M, male; RQI, RNA quality indicator; SZ, schizophrenia. Family history of other psychosis, reports any other psychiatric mental illness in any first- or second-degree relative.