An Epidemiological Model for Examining Marijuana Use over the Life Course

Table 2

Average person-years of marijuana use predicted by RAND Marijuana Microsimulation Model.

			Highest marijuana use proclivity level:
	Overall (for ever users)		Occasional		Regular		Heavy
	Mean	95% interval	Mean	95% interval	Mean	95% interval	Mean	95% interval
Everyone	8.8	(7.7, 9.9)	5.4	(4.8, 6.0)	8.3	(7.4, 9.2)	11.8	(10.5, 13.1)
Race/ethnicity
White	9.1	(8.0, 10.2)	5.4	(4.8, 6.0)	8.4	(7.5, 9.3)	12.1	(10.7, 13.4)
Black	8.2	(7.2, 9.2)	5.1	(4.6, 5.7)	7.9	(7.0, 8.8)	11.3	(10.1, 12.6)
Hispanic	8.2	(7.1, 9.3)	5.3	(4.7, 6.0)	8.1	(7.1, 9.0)	11.3	(9.9, 12.7)
Male	9.1	(8.1, 10.1)	5.4	(4.8, 5.9)	8.4	(7.5, 9.2)	12.1	(10.8, 13.3)
Female	8.5	(7.4, 9.6)	5.4	(4.8, 6.0)	8.2	(7.2, 9.1)	11.5	(10.1, 12.9)