Functional Activation and Effective Connectivity Differences in Adolescent Marijuana Users Performing a Simulated Gambling Task

Table 2

Marijuana and drug use summary.

	Controls	Users
Weekly drug use (mean ± SD)
Marijuana (uses/week)	0	6.7 ± 1.5
Cigarettes (cigarettes/week)	0	5.4 ± 9.1
Alcohol (drinks/week)	0	3.7 ± 5.6
Lifetime drug use (# ever used)
Marijuana (# ever used)	0	14
Stimulants	0	2
Opiates	0	3
Benzodiazepines	0	2
Hallucinogens	0	3