Table 1.

Patterns of cannabis use at baseline and psychotic symptoms at follow up. Figures are numbers (percentages) of participants

	Any psychotic symptom at follow up		At least two psychotic symptoms at follow up
Cannabis use at baseline	Yes (n=424)	No (n=2013)	Yes (n=174)	No (n=2263)
Any use (≥5 times)	82 (19.3)	238 (11.8)	44 (25.3)	276 (12.2)
Cumulative frequency*:
None	342 (80.7)	1775 (88.2)	130 (74.7)	1987 (87.8)
<1 times/month	13 (3.1)	69 (3.4)	5 (2.9)	77 (3.4)
3-4 times/month	18 (4.2)	62 (3.1)	10 (5.7)	70 (3.1)
1-2 times/week	17 (4.0)	40 (2.0)	7 (4.0)	50 (2.2)
3-4 times/week	12 (2.8)	21 (1.0)	8 (4.6)	25 (1.1)
Almost daily	22 (5.2)	46 (2.3)	14 (8.0)	54 (2.4)

^*Some percentages do not total 100 because of rounding.