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Sir.—In 1984, 125,000 American high school seniors (5.0%) smoked marijuana daily. Currently, "street pot" in the United States is 300% more potent than marijuana specimens analyzed during the mid-1970s and sinsemilla (seedless marijuana) is 600% more potent. Daily marijuana use has been shown to correlate positively with the use of other psychoactive drugs and with school truancy. There has been a negative correlation with school grades. We studied 15 male and ten female (N = 25) middle-class young adolescent (median age, 16 years) daily marijuana smokers (used marijuana two to four times per day; 1.75 oz of marijuana, usually sinsemilla, used per month; $22 spent per week on marijuana; and median duration of daily use, 1.25 years [range, four months to three years]).
This group of daily marijuana smokers used other illicit drugs less than 25 times each per lifetime of use and drank alcohol no more and usually less
SCHWARTZ RH, PEARY P. Middle-class Adolescent Daily Marijuana Users: Demographic Behavioral and Scholastic Characteristics. Am J Dis Child. 1986;140(4):326-327. doi:10.1001/archpedi.1986.02140180060015