Demographic and baseline clinical characteristics of the total sample and by cannabis misuse group.

Note: DUP, Duration of Untreated Psychosis; FSIQ, Full Scale IQ (see the text for tests abbreviations).at-test reported with correction for unequal group variancesb Due to missing data, DUP n = 68 (35 & 33 per group); premorbid IQ n = 73 (38 & 35 per group); PAS n = 64 (36 & 28 per group);ct-test based on logarithmic-transformed data due to the skewness of the raw data.d Estimated on the basis of time between onset of symptoms and entry into the service.e Estimated by the Wechsler Test of Adult Reading.Demographic and baseline clinical characteristics of the total sample and by cannabis misuse group.