An Epidemiological Model for Examining Marijuana Use over the Life Course

Table 3

Percent of population cohort ever becoming a regular or heavy marijuana user.

	Regular marijuana use		Heavy marijuana use
	Mean	95% interval	Mean	95% interval
Overall	41.8%	(39.3%, 44.3%)	24.4%	(22.2%, 26.5%)
Race/ethnicity
White	44.9%	(42.3%, 47.4%)	26.9%	(24.6%, 29.2%)
Black	35.9%	(33.1%, 38.8%)	20.0%	(17.7%, 22.3%)
Hispanic	35.8%	(32.7%, 38.8%)	19.2%	(16.8%, 21.7%)
Gender
Male	45.4%	(42.8%, 48.1%)	27.6%	(25.2%, 29.9%)
Female	38.3%	(35.7%, 41.0%)	21.3%	(19.2%, 23.5%)