Table 1.

Demographics and clinical features in the CHR cohort

	Recent cannabis use	No recent cannabis use
Mean age (SD)	20.9 (3.8)	21.2(3.78)
Gender (% male)	75%	78%
Ethnicity (% Caucasian)	46%	48%
Medication (%)	29%	33%
Positive symptoms (range 0 – 30)	12.8(4.4)	13.1(4.7)
Anhedonia (range 0 – 61)	20.7(10.0)	25.8(8.8)
Anxiety (range 0 – 63)	18.0(12.9)	16.3(12.7)

Positive symptoms were assessed using the Structured Interview for Prodromal Syndromes/Scale of Prodromal Symptoms (Miller et al., 2003); physical anhedonia was assessed using the Chapman Physical Anhedonia Scale (Chapman et al., 1976); and anxiety was assessed using the Beck Anxiety Inventory (Beck et al., 1988).